COPPER TUBE TOOL

RF20SII CORDLESS FLARESTAINLESS FLEXIBLE TUBE TOOL

RT20SII CORDLESS FLANGEOPERATION MANUALORIGINAL INSTRUCTIONS

RF20SII

RT20SIIBe sure to read thisOperation Manual
before using the product.

- Note -- Be sure to hand this Operation Manual to the user.
- To ensure safe and efficient use, read the manual thoroughly
before using the product.
- Be sure to keep the Operation Manual where the operator
can refer to it whenever necessary.

Date of purchase:
Distributor / Dealer:

Year

Month

Thank you for purchasing a REX product.
Our product will give you years of reliable service if you simply follow the instructions in thisOperation Manual carefully. Before using the product, make sure you read the manual from start
to finish, paying particular attention to the Safety Considerations on pages 4 - 6 andPrecautions on pages 7 - 10. To avoid accident and injury, never use the product for any
purposes other than those described in this Operation Manual.
Should you need further advice, contact your distributor, dealer or REX INDUSTRIES CO., LTD.

CONTENTS
General Safety Warnings for Power Tools............................................................................. 1
Safety Considerations........................................................................................................... 4
Precautions for using RF20SII/RT20SII................................................................................ 7
Precautions for using the charger/battery............................................................................. 8
Main Parts, Specifications for RF20SII................................................................................ 11
Main Parts, Specifications for RT20SII................................................................................ 12Standard Accessories, Usage (For RF20SII/RT20SII)......................................................... 13
Operation Guide (For RF20SII/RT20SII).............................................................................. 15
Getting Ready:................................................................................................................ 15
Charging the battery................................................................................................ 15
Operation Guide (Flaring copper tube)................................................................................. 17
1) Cutting and scraping the tube.............................................................................. 172) Clamping the tube............................................................................................... 183) Flaring.................................................................................................................. 20
4) Removing the tube.............................................................................................. 22
RT20SII: Flanging................................................................................................................. 23
1) Cutting flexible tubes........................................................................................... 23
2) Setting the clamp................................................................................................. 24
3) Flanging............................................................................................................... 24
4) Removing the tube.............................................................................................. 25
Operation Guide (Replacing the flaring or flanging cone).................................................... 26
Maintenance and Care ....................................................................................................... 27
Servicing and Repairs......................................................................................................... 28
Before Asking for Repairs or Servicing ............................................................................... 29
Troubleshooting (RF20SII)............................................................................................ 29
Troubleshooting (RT20SII)............................................................................................ 30
Troubleshooting (RF20SII / RT20SII)............................................................................ 31
Troubleshooting (Charger RF20SC).............................................................................. 31
Optional Accessories for RF20SII....................................................................................... 32
Optional Accessories for RT20SII........................................................................................ 34
Optional Accessories for RF20SII & RT20SII...................................................................... 36

Definitions ofandIn this Operation Manual, warnings are divided intoand.
: indicates actions which could possibly result in death or severe injury to the user if
the machine is used incorrectly.
: indicates actions which could possibly result in injury to the user, or physical damage,if the machine is used incorrectly.
Even items labelled
could have serious results under certain conditions.
Be sure to observe these warnings carefully as they greatly affect safety.
- If this Operation Manual is lost or damaged, promptly order a replacement from your distributor,
dealer or link to https://www.rexind.co.jp/e/- Parts and specifications are subject to change without prior notice, due to improvements in quality,
performance or safety standards. In such cases, the contents, photographs, illustrations, etc. in the
Operation Manual may be different to the product you have purchased.

Safetyfor Power Tools
General SafetyGeneral
Warnings
forWarnings
Power Tools
WARNING
Read all safety warnings and all instructions. Failure to follow the warnings andinstructions may result in electric shock, fire and/or serious injury. Save all warnings andinstructions for future reference!
The term “power tool” in the warnings refers to your mains-operated (corded) power toolor battery-operated (cordless) power tool.
1. Work area safety.

- Keep the work area clean and well lit. Cluttered or dark areas invite accidents.
- Do not operate power tools in explosive atmospheres, such as in the presence of flammableliquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
- Keep children and bystanders away while operating a power tool. Distractions can cause
you to lose control.

2. Electrical safety- Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any
adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets
will reduce risk of electric shock.
- Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges andrefrigerators.
There is an increased risk of electric shock if your body is earthed or grounded.
- Do not expose power tools to rain or wet conditions. Water entering a power tool will
increase the risk of electric shock.
- Do not mistreat the cord. Never use the cord for carrying, pulling or unplugging the power
tool. Keep the cord away from heat, oil, sharp edges or moving parts.
Damaged or entangled cords increase the risk of electric shock.
- When operating a power tool outdoors, use an extension cord suitable for outdoor use,which reduces the risk of electric shock.
- If operating a power tool in a damp location is unavoidable, use a residual current device(RCD) protected supply. Use of an RCD reduces the risk of electric shock.

3. Personal safety.

- Always work with great attention to how you handle and operate the tool and to thesurrounding conditions. Carelessness may result in accident or injury.
- Do not operate the tool when concentration is lowered such as when tired, after drinking
alcohol, when sick,affected by medicines, etc. A moment of inattention while operating
power tools may result in serious personal injury.
- Use personal protective equipment. Always wear eye protection. Protective equipment suchas a dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate
conditions will reduce personal injuries.
- Prevent the product from starting up unintentionally or unexpectedly. Ensure the switch isin the off-position before connecting to a power source and/or battery pack, picking up or
carrying the tool. Carrying power tools with your finger on the switch or energising power
tools that have the switch turned on invites accidents.
- Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left
attached to a rotating part of the power tool may result in personal injury.
- Do not overreach. Keep proper footing and balance at all times. This enables better controlof the power tool in unexpected situations.

1General Safety Warnings for Power Tools
WARNING- Dress appropriately. Do not wear loose clothing or accessories such as necklaces, etc.
Keep your hair, clothing and gloves away from moving parts. Loose clothes, accessories orlong hair can be caught in moving parts.
- If devices are provided for the connection of dust extraction and collection equipment,
ensure these are connected and properly used. Use of dust collectors can reduce
dustrelated hazards.
- Do not let familiarity gained from frequent use of tools allow you to become complacent andignore tools safety principles. A careless action can cause severe injury within a fraction of asecond.

4. Power tool use and care.

- Do not force the power tool. Use the correct power tool for your application. The correct
power tool will do the job better and safer at the rate for which it was designed.
- Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot
be controlled with the switch is dangerous and must be repaired.
- Disconnect the plug from the power source and/or the battery pack from the power tool
before making any adjustments, changing accessories, or storing power tools. Such
preventive safety measures reduce the risk of starting the power tool accidentally.
- Store idle power tools out of the reach of children and do not allow persons unfamiliar withthe power tool or these instructions to operate power tool. Power tools are dangerous in thehands of untrained users.
- Maintain power tools regularly. Check for misalignment or jamming of moving parts,
breakage of parts and any other condition that may affect the power tool’s operation. If
damaged, have it repaired before use. Many accidents are caused by poor maintenance.
- Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cuttingedges are less likely to jam and are easier to control.
- Use the power tool, accessories and tool bits etc. in accordance with these instructions,taking into account the working conditions and the work to be performed. Using the productfor anything other than its intended use can result in a hazardous situation.
- Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery
handles and grasping surfaces do not allow for safe handling and control of the tool in
unexpected situations.

5. Battery tool use and care.

- Recharge only with the charger specified by the manufacturer. A charger that is suitable for
one type of battery pack may create a risk of fire when used with another battery pack.
- Use power tools only with specifically designated battery packs. Use of any other battery
packs may create a risk of injury and fire.
- When the battery pack is not in use, keep it away from other metal objects such as paper
clips, coins, keys, nails, screws or other small metal objects that can make a connection
from one terminal to another. Shorting the battery terminals together may cause burns or afire.
- Under extreme conditions, fluid may leak from the battery; avoid contact. If you do
accidentally come into contact with the fluid, flush with water. If battery fluid contacts theeyes, seek medical help immediately. Fluid that leaks from the battery may cause irritationor burn you.
- Do not use a battery pack or tool that is damaged or modified. Damaged or modified
batteries may exhibit unpredictable behaviour resulting in fire, explosion or risk of injury.

2General Safety Warnings for Power Tools
WARNING- Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire ortemperature above 130°C may cause explosion. The temperature 130°C can be replaced by
the temperature 265°F.
- Follow all charging instructions and do not charge the battery pack or tool outside thetemperature range specified in the instructions. Charging improperly or at temperatures
outside the specified range may damage the battery and increase the risk of fire.

6. Servicing- Have your power tool serviced by a qualified repair professional, using only identicalreplacement parts. This will ensure that the safety of the power tool is maintained.
- Never service damaged battery packs. Service of battery packs should only be performedby the manufacturer or authorized service providers.

3Safety
Considerations
SafetyConsiderations
WARNING
1. Ensure you use the correct voltage.

- Be sure to use the voltage indicated on the name plate of the main body or in theoperation manual. Using the product at a voltage different from that indicated can result inoverheating, smoke or fire.

2. Be sure to keep your hands off the trigger switch before inserting the battery into
the main body.

- If you insert the battery into the body while your fingers are on the trigger, the unit may start
operating abruptly.
This is liable to result in an accident, so be sure to keep your hands off the switch.

3. Be sure to avoid electric shock.

- Do not touch the plug with wet hands.
- Do not use the product in rain or in places where moisture can easily get into it.
- Be sure to ground the product to avoid electric shock.

4. Take notice of conditions at the work site.

- Do not use the product in rain, humid or damp places, or places where moisture can easily
get into it. Humidity will lower insulation of the motor and cause electric shock.
- Do not use close to flammable fluids or gases, such as gasoline and thinner. Doing so could
result in fire or explosion.
- Do not install, charge, or use the product in a humid or wet place, nor expose it to rain orsnow. Doing so may cause electric shock or injury.
- Do not install, charge, use or leave the product in a hot place such as near a fire or under
the scorching sun. Doing so may result in overheating, smoke, or fire.

5. Use designated accessories and attachments.

- Do not use accessories and attachments other than those designated in the operation
manual or our catalogues. Doing so may result in accidents or injuries.

6. In the following cases, be sure to remove the battery from the product after
releasing the trigger.

- When the product is not in use or parts are changed, repaired, cleaned or inspected.
- When hazards are expected.

7. If any abnormality is noticed, stop operating the product immediately.

- If the product does not operate smoothly, or abnormalities such as unusual odours, vibration
or noise are detected, stop operating it immediately.
- For safe and efficient operation, maintain the product and keep it at its full potential. Using a
product that is not fully operational may cause injury.
- Check symptoms against the items in the section entitled, “Troubleshooting” at the end of
this manual and observe the corresponding instructions. Using the product continuously
may result in overheating, smoke or fire, causing accident or injury.
- If it overheats or smoke is detected, do not attempt an overhaul yourself but ask for aninspection and repair.
- Be careful not to shake, drop or forcefully impact the body of the tool as it has a built-in
precision mechanism. Doing so may affect the product’s operation.

4

Safety Considerations
WARNING
8. Keep the work site clean.

- Ensure you keep worktables and the work site in good order and well lit. A cluttered site

and work table are liable to cause accidents.

9. Do not let unauthorised personnel near the product.

- Do not let anyone other than authorised personnel touch the product or the power cord.
- Do not let anyone other than authorised personnel enter the work site, especially children.
Doing so may lead to injury.

10. Do not apply excessive force when using the product.

- To ensure safe and efficient operation, use within the capacity of the product. Applying force
may not only damage the product but could also result in accident or injury.
- Do not use the product in any way that could cause the motor to lock, or cause smoke orfire.

11. Use the flaring/flanging tool only for its designated purpose.

- Do not use the product on tubes not specified in this manual. Using the product for any
purpose other than flaring/flanging tubes, such as fastening the tube to a joint etc., will not
only damage the product and/or motor but could also lead to accident or injury.

12. Wear appropriate clothing.

- Do not wear loose or loose-sleeved clothing, ties, accessories such as necklaces, knitted
gloves or scarves. Do up all buttons, fasteners, etc. on the clothing you are wearing before
starting work. Otherwise, you could get caught in the rotating parts, resulting in serious
accident or injury.
- When working outdoors, it is recommended that you wear rubber gloves and non-slip shoes.
Slippery gloves and shoes are liable to cause injuries.
- Wear safety caps, safety shoes, safety glasses, dust masks, protective noise-reduction
equipment etc. according to the working environment.
- Do not wear scarves, and cover long hair with caps or hair nets to prevent them gettingcaught in rotating parts.

13. Do not work in an unnatural posture.

- Keep a firm footing and balance to avoid falling over and injuring yourself.

14. Remove tools used for inspection such as wrenches.

- Before turning the switch ON, check that tools used for inspection and adjustment havebeen removed. Failure to pay attention to this may result in an accident or injury.

15. Operate the product with great care.

- Always pay great attention to how you handle and operate the product and to thesurrounding conditions. Carelessness may result in accident or injury.
- Do not operate the product when concentration is lowered such as when tired, after drinking
alcohol, when sick, or affected by medication, etc.

5

Safety Considerations
WARNING
16. Do not handle the power cord carelessly.

- Do not carry the product by the cord, or pull the plug out of the socket with the cord.
- Do not place the cord near heated objects, fats & oils, or cutters and other objects withsharp edges.
- Take care not to tread on the cord, pull the cord or apply unnecessary force resulting indamage to the cord. Electric shock or short-circuit may occur, causing fire.

17. Perform careful maintenance daily.

- When changing accessories and parts, follow the operation manual carefully.
- Keep parts used for gripping the product dry and clean, and free of oil and grease.
If oil or grease remains on the product, it may slip and cause injury.
- Periodically inspect the power supply cord and plug. If damaged, ask the store where youbought them or a REX distributor or dealer for repairs. If you leave them as is, you may get
an electric shock, or a short circuit may cause a fire.
- If an extension cord is used, inspect the cord periodically and, if damaged, replace it. If you
leave as is, there is a danger of electric shock, short circuit or fire.
- If extension cords are used outdoors, use extension cords designed for outdoor use toprevent electric shock, short-circuit or fire.

18. Check for damaged parts.

- Before using the product, carefully inspect the external appearance of the product and otherparts for damage, and make sure that it operates normally and can perform its intended
functions.
- Inspect the product for any abnormalities such as in adjustment of movable parts, tightening,damage to parts, etc.
- Check the adjustment position of moving parts, tightening, damage to parts, installation andany other abnormalities.
- When replacing or repairing broken parts, follow the operation manual. If no instructions are
specified in the operation manual, ask your distributor or dealer for repairs.
- Do not use the power cord or plug if damaged. If you leave them as is, there is a danger ofelectric shock, short circuit or fire. Ask your distributor or dealer for repairs.
- Do not use if the switch does not work properly.

19. Store carefully when not in use.

- Store in a dry place away from children and locked with a key.

20. For overhaul and repair, ask an appointed REX agent.

- Our products comply with corresponding safety standards. Do not remodel.
- Be sure to ask your distributor or dealer for any repairs. If repairs are carried out by unskilled
or unqualified personnel, the product’s performance will be adversely affected, which may
result in accident or injury.

21. Fix the object to be processed securely.

- Fix the object to be processed securely. If it isn’t, it will not be processed correctly and may
cause an accident or injury.

		

6Precautions
for using RF20SII/RT20SII
Precautions for using
RF20SII/RT20SIIWARNING
1. Hold securely!

- When you switch on and the flare cone starts rotating, the hand you hold the product withmay be jarred; take care not to hit any objects around you.
- NOTE: Do not keep the trigger fixed in position deliberately.

2. Take care when working in high places!

- When working high up, make sure that there is nobody below you. If anything falls down, it
may cause an accident or injury.

3. Avoid letting the product start up unexpectedly!

- Do not carry the product with your finger on the trigger. The product may suddenly start up
causing an injury.

4. Install the battery securely!

- If it is not secure, the storage battery may fall out and cause an injury.

5. Pay attention to the time it takes to process the flare!

- When the flare is processed, the clutch makes a rattling sound. Release the trigger within
2 to 3 seconds after you hear the sound. If the processing time is prolonged, the flare may
become thinner, resulting in insufficient adhesion with the joint, which may cause leakage.
See also page 20 of this Operation Manual.

CAUTION
1. The flanging tool RT20SII is designed exclusively for making flanges on SUS304,
SUS316L flexible stainless steel water tubes. Do not use for any other purpose.
2. Use for water tubes only. Never use for paraffin or gas tubing.
3. Make sure clamps and tubes are mounted securely or else they could come apart,
resulting in accident or injury.

7Precautions
forforusing
the charger/battery
Precautions
using
the charger/battery
WARNING
1. The charger is for exclusive use with REX original products only!

- When charging the battery, use the exclusive battery charger only and none other. Neveruse the charger for any other rechargeable tool or battery. The use of any other combinationof battery and charger can be dangerous. Never do so.

2. When charging, do not use transformers such as a booster or the like!

- Doing so will damage the charger. Use an electrical supply of the specified stated voltage
only.

3. Cannot be used with a generator or with direct current!

- Never use with a generator or with direct current. Doing so may cause a fire, which will
damage the charger.

4. Always charge indoors!

- Take care to prevent the battery and charger from getting wet; always charge indoors.
- Keep away from fire.
- Do not use near inflammable materials.
- When charging, the battery and charger may get fairly hot; keep out of direct sunlight andcharge in a well-ventilated room.

5. Humidity can lead to accidents!

- Do not use in the rain, in humid conditions, or where it is wet. Humidity can result in anelectric shock. Humidity should also be avoided as it can weaken the charger or the motor’s
insulation.

6. When charging is complete, remove the battery and pull out the plug!

- When charging is complete, remove the battery from the charger and remove the plug fromthe mains. Also, be sure to remove the plug if there is a power cut.

7. Charge within a range of 10 to 40ºC!

- The charger has a special circuit for rapid charging - approx. 70 minutes, it should be usedwithin an ambient temperature of between 10 and 40ºC. The battery’s built-in protection
system does not allow charging outside this range.

8. Do not use the same charger continuously!

- Using the same charger continuously can cause it to overheat, resulting in an accident.
After use, remove the plug and allow the charger to cool down for approximately 15 minutes
before using again.
- When charging twice in a row, allow the charger to rest for more than 15 minutes to cool
down before charging again.

When charging 3 or more times consecutively, allow to rest for more than 1 hour
and then charge again when the charger has cooled down.
9. Do not charge the battery straight after a rapid discharge!

- Even after placing in the charger, the red LED may flash on and off slowly indicating that it is
not yet possible to charge, or fully charge, a battery that is still hot after continuous use, etc.
- If the battery is discharged rapidly by continuous use and the battery is hot, wait until thebattery has cooled down before charging again.

8

Precautions for using the charger/battery
WARNING
10. Do not charge for more than 2 hours!

- If the green LED does not start blinking after charging for about 2 hours, stop charging; theLED might possibly be malfunctioning.

11. Charge every 3 to 6 months!

- Even if you do not use the battery for a while, we recommend charging it every 3 to 6
months to prevent over discharge.

12. Do not keep fully charged for long periods of time!

- If you keep the battery for a long period, every 3 to 6 months store it at normal temperatureand 40 to 80% charged. Be sure to remove the battery from the body or the charger.

13. Never insert any foreign object into the battery slot in the charger!

- There are terminals located inside the slot. If you insert metal, water or other foreign objects
into the slot, it will cause a short and cause the charger to break down.

14. Do not disassemble the charger or battery!

- Never disassemble the battery; it contains a special built-in device for rapid charging approx. 70 minutes. You will damage the body if you try to disassemble it.
- The charger has a built-in condenser and other electronic parts; disassembling the body willlead to electrical shock and damage.
- If either the charger or battery body does not function properly do not disassemble toattempt a repair yourself. Always return to the store where you bought them or to a REX
distributor or dealer for repair.

15. Do not short circuit the battery!

- The battery has a very low internal resistance. If it shorts, there will be high current and the
body will overheat resulting in it burning or breaking down.

16. Never throw a battery in a fire!

- If you throw a battery in a fire, it may explode. Do not throw in a fire, incinerator or the like.

17. Do not insert any foreign body into the air vents in the charger!

- If anything metallic or any inflammable material gets into the vents, it can cause an electric
shock and damage the body. Use in as dust-free a location as possible.

18. If any abnormality arises, stop charging at once!

- If you notice any abnormality such as overheating or an unusual smell, stop charging
immediately and send the product for repair.

19. Take care when storing the charger!

- Always store where the ambient temperature is under 40ºC, and out of the reach of children.
- Store in a dry place away from the rain so as to reduce deterioration of the unit’s insulationand to prevent electric shock.

20. Recycling Lithium-ion batteries you no longer need

- Never throw away unwanted lithium-ion batteries together with ordinary household garbage.
Wrap the terminals in insulating tape to prevent a short, and dispose of in accordance withlocal laws and regulations governing such items.

9Precautions for using the charger/battery
WARNING
21. Product Shipping Notice!

- If this product is to be transported by sea as a non-hazardous material, it must comply with
SP188 of the “UN Recommendations on the Transport of Dangerous Goods”. Contact yourshipping company for details.

22. To prevent the charger and battery from emitting smoking, overheating, igniting or
the battery fluid leaking, always comply with the following:a) Do not use the charger or battery if they have been dropped or have undergone a hard
impact.
b) Do not allow metal objects and the like to come into contact with the terminals.
c) When storing the units, keep them away from metal objects (screws, nails, coins etc.).
d) Do not leave, charge or use the charger or battery near a fire, under strong sunlight, or
where the temperature is very high.
e) Do not use a battery if it has visible external damage or has become deformed.
f ) Never place in a microwave oven or high pressure vessel; do not expose to hightemperatures or pressure.

23. If you think something is wrong, stop immediately.

- If the battery fluid is leaking or you notice a bad smell, immediately keep away from any
nearby fire or source of heat.
- While using, charging or even storing the battery, if you notice any bad smell, overheating,change of colour or shape, or any other abnormality you have not seen before, remove itfrom the tool or charger immediately.
- If any leaked battery fluid gets in your eyes, do not rub your eyes with your hands.
Immediately wash with clean tap water, and then go directly to the doctor’s for treatment.
Failure to do so could lead to serious damage to your eyes.
- If any leaked battery fluid gets on your skin or clothing, wash with clean tap water
immediately. Such discharge can cause severe skin irritation.

24. Cautions when charging the battery.

- The battery is not charged when you purchase the product, so you will need to charge it.
Sometimes, it may be difficult to fully charge a new battery, or one that has not been used
for a long time. In such cases, repeat charging and discharging the battery a few times torestore it to its full capacity.
- The battery will be hot immediately after using the tool. Leave it to cool for a little before
recharging.
- If the red LED goes out straight after you start charging, remove the battery from thecharger, wait until the temperature is within a range of 10 to 40ºC and start again. This is therange within which the battery can be charged. If it still doesn’t work after several attempts,
then it means that the battery has reached the end of its life or is out of order.
- If you charge the battery outside the 10 to 40ºC range, the red LED will flash on and
off indicating the battery cannot be charged. However, the charger will start charging
automatically once the battery is within the correct temperature range.

		

10Main Parts, Specifications for RF20SII
Main Parts
Ventilation hole

Main body

Flaring cone

Power cord
Green
lamp

FWD rotation

ChargerRed
lamp

Battery
mounting socket

Trigger
REV rotation
Lithium-ion
battery

Latch

Hex keyStrap

Hex socket
button headscrew
(M4 x 8)Carrying case

COPPER TUBE TOOL

Clamp with liner

RF20SII CORDLESS FLARESTAINLESS FLEXIBLE TUBE TOOL

RT20SII CORDLESS FLANGEOPERATION MANUALORIGINAL INSTRUCTIONS

RF20SII

RT20SIIBe sure to read thisOperation Manual
before using the product.

- Note -- Be sure to hand this Operation Manual to the user.
- To ensure safe and efficient use, read the manual thoroughly
before using the product.
- Be sure to keep the Operation Manual where the operator
can refer to it whenever necessary.

Date of purchase:

Year

Month

Distributor / Dealer:

Liner

Stopper plate

Operation ManualFig. 1

Specifications (Cordless Flare RF20SII)
Applicable tube
Applicable tube size
Flare
Processing method
Switches
Cone speed
Power
Potential No. of flares
Processing time
Vibration*
Uncertainty (K)*

Copper tube (O/OL material) JIS H 3300 C1220T
Nominal diameter
¼″
⅜″
½″
⅝″**
Outer diameter (mm)

6.35

9.52

12.70

15.88

¾″**
19.05

Supports Class 2 refrigerant (Supports R410A, R32)
Complies with shapes described in JIS B 8607. (Referred to elsewhere.)
Eccentric cone (constant-pressure plunge rotation)
Rotate clockwise/Anti-clockwise switch
0 - 290/min-1 (rpm)DC motor½″: Approx. 250 tube ends per fully charged battery.
(May vary depending on usage.)
Approx. 5 sec.
1.15 m/s2
1.5 m/s2* Warning: The vibration emission during actual use of the power tool can differ from thedeclared total value depending on the ways in which the tool is used.
** May be sold separately.

Table 111

Main
Specifications
for RT20SII
MainParts,
Parts,
Specifications
for RT20SII
Main Parts
Flanging cone

Ventilation hole

Main body

Power cord
Green
lamp
FWD rotation

ChargerRed
lamp

Battery
mounting socket

Trigger
REV rotation
Lithium-ion
batteryStrap

Hex key

Clamp with liner
Hex socket
button head screw(M4 x 8)Carrying case

COPPER TUBE TOOL

RF20SII CORDLESS FLARESTAINLESS FLEXIBLE TUBE TOOL

RT20SII CORDLESS FLANGEOPERATION MANUALORIGINAL INSTRUCTIONS

RF20SII

RT20SIIBe sure to read thisOperation Manual
before using the product.

Latch- Note -- Be sure to hand this Operation Manual to the user.
- To ensure safe and efficient use, read the manual thoroughly
before using the product.
- Be sure to keep the Operation Manual where the operator
can refer to it whenever necessary.

Date of purchase:

Liner

Year

Month

Distributor / Dealer:

Operation ManualFig. 2

Specifications (Cordless Flange RT20SII)
Applicable tube
Applicable tube size

Flexible stainless steel water tube
SUS304, SUS316L (for mains water supply)
M-13 (½″) Outer diameter 16.7- 16.8 mm
M-15 (¾″) Outer diameter 20 mm

No. of flange threads

2 or 3 threads

Processing method
Switches
Cone speed (min-1 /rpm)
Power

Eccentric cone (constant-pressure plunge rotation)
Rotate clockwise/Anti-clockwise switch
0 - 290/min-1 (rpm)DC motor¾″ (3 threads): Approx. 200 tube ends per fully charged battery.
(May vary depending on usage.)
Approx. 5 sec.
1.15 m/s2
1.5 m/s2

Potential No. of flares
Processing time
Vibration*
Uncertainty (K)** Warning: The vibration emission during actual use of the power tool can differ from thedeclared total value depending on the ways in which the tool is used.

12

Table 2

Standard Accessories, Usage (For RF20SII/RT20SII)
Sound pressure level (LPA)
81.5 dB (A) / Uncertainty K=3 dB (A)Sound power level (LWA)
92.5 dB (A) / Uncertainty K=3 dB (A)* Wear the Ear Protection/Use a hearing protection.
Table 3

Battery : Model RB20SB
Battery type
Voltage
Capacity

Lithium-ion battery
DC 10.8 Vd.c.
2000 mAh
Approx. 70 minutes (depending on use)
Charging time*Charge is approx. 80% complete in approx. 55 min.
No. of recharges
Approx. 500 times (depending on use)
Chargeable temperature 10 - 40°C
(Discharging stops when any one cell is reduced to 2.5 V)
Circuit protector
Temperature protection(Battery cannot be charged below 10°C or above 40°C.)
Table 4Charger : Model RF20SC
Battery type
Voltage
Charging system
Charging voltage
Charging current
Chargeable temperature
Circuit protector

REX Lithium-ion battery RF20SB (No. 424987)
AC100 - 240 V (50/60 Hz) 30 W
Constant current and constant voltage system
DC 10.8 Vd.c.
2000 mA
10 - 40°C
Overcharge protection (4.25 V/cell)
Overcurrent protection (7 A fuse)

Table 513

Standard Accessories, Usage (For RF20SII/RT20SII)
Standard Accessories (Size / Weight)
Name
1

Main body RF20SII
Main body RT20SII

2 Battery
Charger3(without power supply cord)
4 Power cord
5 Clamp with ¼" (6.35 mm) liner
6 Clamp with ⅜" (9.52 mm) liner
7 Clamp with ½" (12.70 mm) liner
8 Clamp with ½" (16.8 mm) liner
9 Clamp with ¾" (20.0 mm) liner
10 Carrying case
11 Hex key (Diameter: 2.5 mm)
12 Operation Manual

Size (W x D x H mm) Weight (kg) Qty. RF RT
108 × 72 × 225
1,135
1(108 × 72 × 261)**1,320*with a battery inserted
60 × 54 × 85
185
1
146 × 109 × 61

335

12000 (cord length)85

84 × 84 × 45

Approx.
350

440 × 366 × 113
18 × 63 × 3
210 × 148 × 2

1,600
4
30

1
1
1
1
1
1
1
1
1

Table 6

Usage
- RF20SII: Flaring copper tube. Flanging flexible stainless steel tube. (requires flanging
tool set 424980 s old separately; refer to page 33, Fig. 43).
- RT20SII: Flanging flexible stainless steel tube.

14

Operation Guide (For RF20SII/RT20SII)
Getting Ready:
Charging the battery
1. Remove the battery from the main body bypressing the latch on the battery. (Fig. 3)

Main body

CAUTION- Hold the main body firmly and remove thebattery.
- Charge the battery once the tool starts to lose
power.

Latch

Battery

2. Connect the power cord and charger, and theninsert the plug into the power outlet. Check thatthe green lamp is slowly flashing on and off. This
indicates that the charger is ready to charge.
(Fig. 4)

Fig. 3

Plug
Green lamp

CAUTION- Note: The input voltage is AC100 - 240 V(50/60 Hz).
- Do not use a generator to charge the battery.
- Do not carry the charger with the power cord; it
may drop off.
3. Insert the battery as far as it will go into thebattery mounting socket on the charger. (Fig. 5)
The red lamp indicates that charging has started.
After approximately 55 minutes, the green lamp
starts flashing on and off quickly (indicating it is80% charged).
The battery is fully charged when the lamp stops
flashing but remains on. A full charge takes about
70 minutes in total. (Fig. 5)Power cord

ChargerFig. 4

Battery

Green lamp

Battery
Red lamp mounting socket

Fig. 515

Operation Guide (For RF20SII/RT20SII)
You can check the status of the battery and charger from the red and green lamps.
(Table 7)
Mark

80%

Green lamp Red lamp
Charger status
Flashes
Off
Chargeable
slowlyCharges the battery 0 - 80% of its capacity
OffOn(about 55 minutes)
Charges the battery 80 - 100% of its capacity
FlashesOff(about 15 minutes)
quicklyOn
Off
Fully charged
Flashes The temperature of the battery is outside theOffslowlychargeable range (below 10ºC or above 40ºC)
On
On
Unable to charge (Defective battery etc.)
Table 7

CAUTION- Ensure the battery is attached the correct way round.
- Charge in a place where the temperature is within the chargeable range of 10°C to
40°C. If you charge outside this range, it may degrade the performance and life of thebattery and may even cause a leakage or generate excessive heat.
- The battery or the charger may get slightly hot during charging; choose a dry and wellventilated place that is not exposed to direct sunlight.
- If you intend to charge another battery, leave the charger to cool for at least 15 minutes
before charging the next one.
- If the temperature of the battery is below 10°C or above 40°C, you cannot charge it.

4. Remove the battery from the charger, and thenattach it to the main body. (Fig. 6)

Main body

CAUTION
Latch- If the battery cannot be fully charged even after
following the correct procedure, the battery may
be dead. Attempting to charge a dead battery
may damage the charger.
Battery

16

Fig. 6

Operation Guide (Flaring copper tube)
1) Cutting and scraping the tube

1. Place the tube on the cutter, making sure the endof the tube protrudes further than the width of therollers.
Turn the knob until the rollers and cutter wheel
lightly contact the tube. (Fig. 7)* Cut the tube where it is least flat or bent. Tubes
that are flat or have lots of bends will affect theflare.

Cutting

Tube
Cutter wheel
KnobA

Rotate the cutter around the tube

Fig. 7

2. From where the cutter wheel is placed on thetube, turn the knob ¼ of a turn in the direction of
A in the diagram and then rotate the cutter 2 or 3
times back and forth through 90°. (Fig. 8) Then
once more through one complete rotation to
make a cutting guideline. (Fig. 8)

Mark for cutting

2 or 3 rotations
back and forth;then 1 fullrotationA

3. Then turn the grip slowly, (1/8 of a turn for every
3 or 4 rotations of the cutter) and keep rotating
the cutter as you gradually cut deeper into thetube. (Fig. 9)

About ¼ ofa turnFig. 8

Knob: about 1/8thof a turnCutter: three to four rotations

CAUTION- If you turn the knob too quickly, the cutter wheel
go into too deep and tube may be deformed.
As a result, the tube cannot be flared properly.
(Fig. 10)

OK

Proper cut end.

The cut end innerdiameter is thesame as the actual
inner diameter of
the tube.

Fig. 9NG

Deformed cut ends.

The cut end innerdiameter is thicker
than the actual innerdiameter of the tube.

Cut endInner
diameterof the tube

Fig. 1017

Operation Guide (Flaring copper tube)
4. Use a scraper, reamer or file etc. to remove burrs
from the end of the tube. (Fig. 11)

CAUTION- Hold the cut end facing downward so that metal
chips do not fall into the tube.
- If the cut end has not been properly scraped, thetube cannot be flared properly, and a gas leak
may result.
- Do not make any scratches on the inner surfaceof the tube to be flared. Damage or scratches
may remain even after the tube is flared.

Remove burrs
Tube

Hold the scraper
below the tube sothat metal chips
do not fall into it.

ScraperFig. 112) Clamping the tube

1. Slide a flare nut that is compatible with the tube
size over the tube. (Fig. 12)

CAUTIONTube- Before processing, check that the end of thecopper tube is not deformed. If it is deformed,
you will not be able to process the flare properly.
- Before processing, confirm that there are noburrs left on or in the copper tube. If any burrs
remain, the surfaces that are flared may become
dented and cause a gas leak.
- Pay attention to the direction of the flare nut.
2. Choose a clamp that is compatible with the tube
size, and then place the tube so that the end of it
makes contact with the stopper plate. (Fig. 13)

CAUTION- If there is a space between the tube and thestopper plate, the resulting flare diameter will besmaller.
- Remove any metal chips from the liner, the flarecone and the tube.
To open or close the clamp, turn the knob asindicated by the arrow. (Fig. 13)

18

Flare nut

Fig. 12Preparing
the tube
Clamp
Tube

Do not leave a gap
between the tube andthe stopper plate
Opening or
closing theclamp

Stopper plate

Fig. 13

(Flaring copper tube) Operation Guide
3. Check that the tube is placed correctly and thenclamp it. (Figs. 13-14)

Set the tube in the clamp
so that the stopper plate
does not shift easily.

CAUTION- To confirm that the stopper plate is in perfectcontact with the tube, try to raise the stopper
plate slightly with your finger. If the stopper plateis easy to shift, it implies that there is a space
between the stopper plate and the tube, so reset
the tube. (Fig. 14)- Turn the clamp knob until the clamps are closed
firmly. (Fig. 15)- Be careful to avoid gaps in the liner as they willcause protrusions in the flare, which will result inleakages. (Fig. 16)- The distance between the liners is set slightly
smaller than the external diameter of the tube
so that the tube will not become loose or slip.
Therefore, when clamping the tube, the exteriorof the tube will be scratched, but this will notpose any problem.

Stopper plate

Tube

Liner

Fig. 14

TightenClamp knob

Liner

Large gap

Fig. 15

Large protrusionin the flare.

Fig. 16

4. When replacing the liner, fix it using the hex key
included with the product and the bolts attachedto the clamp. Secure the clamp to the liner using
the included 2.5 mm hex key and 2 hex socket
button screws (M4 x 8) on the clamp. (Fig. 17)

When replacing the liner, secure theclamp against the liner.
Hex socket
button headscrew (M4 x 8)

Clamp
Fit
Liner
Fit

Hex socket
button headscrew (M4 x 8)

Clamp

Fig. 17

19

Operation Guide (Flaring copper tube)
CAUTION- If there is a large step in setting the liner thenthere will also be a large step in the flare which
will cause a gas leak. (Fig. 18.)

Large protrusionin the flare.

Large step

Fig. 183) Flaring

1. Attach the clamp, with the tube in it, to the main
body. (Figs. 19-20)- Attach the clamp to the main body by aligning thejoints on the clamp with the recesses in the main
body, and then turn the main body in the directionof the arrow until you hear a click. (Fig. 20)

Recesses

Flaring
cone

CAUTION- You cannot set the clamp unless the flaring cone
is fully retracted.
- When the flaring cone is out, press the lower
part of the switch to retract the cone. Whenthe flaring cone is fully retracted, you will heara click from the clutch; release the switch.
(Fig. 20)
- Remove any foreign matter (metal chips, etc.)from the flaring cone, as these could cause
scratches on the inner surface of the flare or agas leak.

20

Recesses(Protrusion)

Notch

Front: Main body

Clamp

Fig. 19

Attaching the clamp
Tube

Main bodyFig. 20

(Flaring copper tube) Operation Guide
2. Start flaring by pressing and holding the upper
part of the switch while the cone is rotatinganti‑clockwise (as viewed from behind) andmoving forward. Flaring should be completed
within 3 seconds from when you hear a click;release the switch to stop rotating. (Fig. 21)

CAUTION- If the time for idling (from when the clutch starts
operating until you release the trigger) is too
short, it may sometimes result in insufficientflaring.
- If the time for idling is too long, it may cause
a gas leak resulting from a protrusion or steps
in the flare’s exterior (refer to page 22.), or
reduce the thickness of the tube.

Upper:
Rotateanti-clockwise(as viewed frombehind).
Flaring coneadvances.
Lower:
Rotate clockwise(as viewed frombehind).
Flaring coneretracted.

Fig. 21

3. When you press and hold down the lower partof the switch, the flaring cone will be retracted
while rotating clockwise (as viewed from behind).
When the flaring cone is fully retracted, you willhear a click; release the switch.

CAUTION- If you use the tool when the battery is low, it may stop during processing or retracting.
If you feel that the power is getting weaker, charge the battery as soon as possible.

21

Operation Guide (Flaring copper tube)
4) Removing the tube

1. Detach the clamp from the main body byreversing the steps for installation. (Fig. 22)

CAUTION

Removing the clamp
Main body

Clamp- The clamp cannot be removed unless the flaring
cone is fully retracted. Avoid removing it forcibly,
otherwise the main body may be damaged.
2. Removing the tube
(1) Loosen the knob to (2) open the clamp, andthen (3) remove the tube. (Fig. 23)* Check the shape and dimensions of thefinished flare are acceptable. (Fig. 24). For
information on how to deal with each of thesecases, refer to Troubleshooting. (page 29)- Check that there are no foreign bodies suchas chips or oil on the processed tube. If there
are, remove with a clean, dry cloth.

Small flarediameterLarge flarediameterFig. 22
Removing the tube

Clamp
(2)
Knob

(3)
Tube
(1)

Fig. 23

Scratches on inner
Large protrusion on outer Large step on outersurface of flared tube. surface of flared tube.
surface of flared tube.

Fig. 24

Points to note when connecting flare nuts on refrigerant tubes- Note the following when connecting flared nuts.
1. When connecting a flare nut, coat the thread
and taper part of a flare joint with refrigeratingmachine oil and make the first 3 or 4 turns of thenut by hand.
2. Use Table 8 on the right as a guide to the torquethat should be applied when connecting a flarenut.
3. To prevent gas leaks, ensure the nut is tightened
correctly.

22“Tightening torque used forconnecting flare nuts (JIS B 8607) ”
Nominal Actual outer
diameter diameter (mm)
¼"
⅜"
½"
⅝"
¾"

6.35
9.52
12.70
15.88
19.05

Tightening
torque (N/m)
14 - 18
34 - 4249 - 61
68 - 82
100 -120
Table 8

Operation Guide (Flanging)1) Cutting flexible tubes

1. Rotate the grip anticlockwise and retract thecutter wheel to fit the flexible tube to be cut.
2. Turn the grip clockwise so that the cutter wheel
fits into the centre of the recess of the flexible
tube, and feed in the cutter. (Fig. 25)
3. From where it contacts the recess of the flexible
tube ridge, turn the grip approx. 1/6 of a turn tothe right, feed in the wheel, and rotate the cuttera few turns in the direction shown in the figure.
(Fig. 25)
4. After that, cut the tube in the same way (turn thegrip to the right about 1/6 of a turn, then rotate
the cutter 2-3 turns).

Set the cutter wheel
in the centre of therecess of the tube.
RollerCutterwheel
Flexible tube

Cutterwheel

Rotatecutter

Flexible
tube
cutterSupportroller

Grip: 1/6th of a turnFig. 25

5. Check that there are no burrs or deformation
where the tube has been cut. If there are, thenproper flanging will not be possible, which could
result in leakages. (Fig. 26)

OK

NG

Burrs

Fig. 26

23

Operation Guide (Flanging)2) Setting the clamp

1. Set the clamp so that you place the liner over thesecond or third groove from the end of the tube.
(Fig. 27)
2. Lift the knob and tighten by turning in a clockwise
direction. (Fig. 27)

1. Place the 2. Place the clamp in
the 2nd or 3rdnut on thegroove.
tube.
3. Lift up theknob andtighten.

Fig. 27
3. While looking from the side, check that the endof the tube does not protrude from the clamp.
(Fig. 28)

Clamp

Avoid letting the endof the tube protrude
beyond the clamp.

OK

NG

CAUTION- If the end of the tube protrudes beyond theclamp, the clamp cannot be set on the flanging
tool. If the end of the tube protrudes beyond theclamp, the position of the clamp is incorrect.
Correct the position of the clamp.
- If the end of the tube is deformed and protrudes
beyond the clamp, cut off the deformed sectionof the tube and attach the clamp again.

Fig. 283) Flanging

1. Attach the clamp, with the tube in it, to the main
body. (Figs. 29-30)- Attach the clamp to the main body by aligning
the joints on the clamp with the recesses in
the main body, and then turn the main body inthe direction of the arrow until you hear a click.
(Fig. 29)

24

Attaching the clamp
Flexible tube

Main bodyFig. 29

(Flanging) Operation Guide
2. To start flanging, press and hold the upper part ofthe switch while the flanging cone is rotating anticlockwise (as viewed from behind) and moving
forward. Flanging should be completed within 3
seconds from when you hear a click; release theswitch to stop rotating. (Fig. 30)
3. When you press and hold down the lower partof the switch, the flanging cone will be retracted
while rotating clockwise (as viewed from behind).
When the flanging cone is fully retracted, you willhear a click; release the switch. (Fig. 30)

Upper:
Rotateanti-clockwise(as viewed frombehind).
Flare coneadvances.
Lower:
Rotate clockwise(as viewed frombehind).
Flare coneretracted.

Fig. 30

4) Removing the tube

1. Detach the clamp from the main body byreversing the steps for installation. (Fig. 31-A)

Removing the clamp
Flexible tube

Main body

2. Loosen the knob to open the clamp, and thenremove the tube. (Fig. 31-B)

Fig. 31-A

Removing the tube
(3)

Clamp

(2)

Knob
(1)

Fig. 31-B
3. Make sure the tube has been flanged correctly.
- If it hasn’t, it can lead to water leaks orelectrolytic corrosion. (Fig. 31-C)- Make sure that the processed tube is free of
foreign bodies such as chips and/or oil. If there
are any, remove with a clean, dry cloth.

Inadequate
flanging

OK

NG
Fig. 31-C

25

Operation Guide (Replacing the flaring or flanging cone)
The RF20SII cordless flare can be used to flange flexible tube by attaching special(optional) accessories.
The RT20SII cordless flange can also be used to flare copper tube by attaching special(optional) accessories.
Special accessories (For details, refer to pages 32-35.)
1. Clamps (for RF20SII / for RT20SII)

2. Liners for flaring

Fig. 32
3. Flaring cone

4. Flanging coneFig. 34

Fig. 35

Replacing the flaring or flanging cone (Fig. 36)

3. Remove the cone with aflathead screw driver.

1. Press the upper part of the switch, and advancethe cone as far as it will go.

Thrustbearing

2. Remove the battery.
3. Insert a flat-head screwdriver between the cone
and the body of the tool and take out the cone
while taking care not to lose the thrust bearing.
4. Insert the cone until you hear it click into place.
5. Replace the battery.

WARNING- When replacing the cone, remove the battery
from the main body, otherwise there could be an
accident if the main body starts up suddenly.
26

Fig. 33

Main
body

Flaringcone

Flanging
cone

4. Change
the coneand install.

1. Switch
2. Remove the battery.

Fig. 36

Maintenance and Care

Maintenance and CareCAUTION- Before inspection or maintenance, be sure to remove the battery. If the battery is notremoved, it may start unexpectedly, causing serious injury.
- When an abnormality is found during inspection or maintenance, identify the problem
referring to the descriptions in “Before Asking for Repairs or Servicing” and then follow
the relevant instructions.
Using the product as is, without correcting the abnormality, may generate excessive
heat, fumes, or fire, causing serious accidents or injury.
1. Check all screws- Check all screws on a regular basis and tighten any that are loose.
Using the product if any screws are loose can be dangerous.
2. Keep surfaces clean- Clean the outside of the charger with a soft, dry cloth or with a cloth dampened insoapy water.
Do not use chlorine-based solvents, gasoline or paint thinner as they may dissolve
the plastic.
Also, when using the product, oil may ooze out from a gap in the main body or cone.
This is due to the separation of liquid oil from the grease used inside the main body,and there is no functional problem. It is not a malfunction; just wipe with a dry, clean
cloth.
3. Store properly after use- After the job is finished, store in a dry place where the temperature does not exceed
40°C and with the battery separated from the charger. Keep out of the reach ofchildren.
4. Care of the clamp- If the knob is stiff when you tighten it, apply
oil, grease, etc. as shown in the figure on theright. (Fig. 37)

GreaseFig. 3727

Servicing
andRepairs
Servicing
andRepairs
This product is produced with great precision; therefore, should it fail to operate normally,
do not disassemble or repair it by yourself; contact your distributor, dealer or REX
INDUSTRIES CO., LTD.
If you do not find any problem or remedy in Troubleshooting in this manual, or parts are
required or if you have any questions, please contact us at your earliest convenience.
Replacement parts are maintained for a period of 7 years after
production of this model has been terminated.
Availability of
Replacement Parts Electrical parts, however, will remain available for a period of 5
years.

28

Asking
for Repairs or Servicing
Before Asking forBefore
Repairs
or Servicing
If an abnormality occurs with the product, check the following and then contact your
distributor, dealer or REX INDUSTRIES CO., LTD.

CAUTION- If there is no description of, or instructions regarding, the problem in question in thefollowing table, never try to disassemble or repair the product by yourself.
- If any problems are not dealt with below or if there are any instructions that indicate
repair or servicing are needed, be sure to contact the manufacturer or the distributor ordealer from whom you purchased the product.
- If the product is repaired by personnel without the proper knowledge or skills, it may
cause serious accidents or injury, as well as adversely affecting the performance.

Troubleshooting (RF20SII)
ProblemCause

The diameter of the flare is too
small.

The tube end was pinched due
to feeding with the wheel tooquickly when the tube was cut.
Burrs were left on the tube end.

The diameter of the flare is toolarge.

Ring-shaped flaws occur on theinside of the flare.
(If the flaws are superficial, thisdoes not pose a problem.)RemedyFeed the cutter wheel more
slowly to cut the tube.
(Refer to page 17.)
Remove the burrs.
(Refer to page 18.)
There was a space between the Place the tube, taking care nottube end and the stopper plate. to leave a space between the
tube end and the stopper plate.
(Refer to pages 18-19.)
The idling time from when the
Increase the idling time.
clutch started operating was too (Refer to pages 20-21.)
short.
Flaring pressure is diminished.
Ask for inspection or repairs.
(Refer to pages 27-28.)
Tube end is protruding from the Place the tube so that the
stopper plate.
tube end is in contact with the
stopper plate.
(Refer to pages 18-19.)
The idling time from when the
Decrease the idling time.
clutch started operating was(Refer to page 21.)
excessive.
Large burrs were left on the
Remove the burrs.
tube end.
(Refer to page 18.)
The idling time from when theMake the idling time longer.
clutch started operating was too (Refer to page 21.)
short.
Flaring pressure is diminished.
Ask for inspection or repairs.
(Refer to pages 27-28.)

29

Before Asking for Repairs or Servicing
ProblemCause

Flaws other than ring-shaped
Flaws were made whileones (vertical flaws, dents, etc.) removing burrs inside the tube.
occur on the flared inner surfaceof the tube.
Dirt or scrap adhered to the flarecone or the inside of the tube.
Flaring pressure is diminished.
A larger protrusion (0.3 mmor more) can be seen on theexternal surface of the flare.
A larger step (0.3 mm or more)
can be seen on the externalsurface of the flare.

The flare is not symmetrical.

The clamp knob wasn’ttightened enough leaving too
much clearance between theliners.
The liner was attached withsteps in it.
There was a step (0.3 mm ormore) on the surface of theclamp where the liner was
installed.
Flaring was done on a tube thatwas cut at an angle.
Flaring was done on a tube thatwas too flat or bent.

RemedyRemove the burrs without
making any flaws on the insideof the tube.
(Refer to page 18.)
Remove any dirt or scrap.
(Refer to page 18.)
Ask for inspection or repairs.
(Refer to pages 27-28.)
Tighten the clamp knob until
there is no space between theliners.
Attach the liner without steps.
(Refer to pages 19-20.)
Ask for inspection or repairs.
(Refer to pages 27-28.)

Cut at right angles to the tube.
Flare the tube where it is not too
flat or bent.

Table 9Troubleshooting (RT20SII)
Problem
Unsatisfactory shape of theflange.

Cause
The idling time from when the
clutch started operating was too
short.
You cannot attach the clamp
The end of the tube iswith the tube in it to the flanging protruding beyond the clamp.
tool.
(The number of threads iswrong or the tube is too
deformed.)
You can hear the sound of the
The end of the tube is
motor but the flanging tool won’t protruding beyond the clamp.
flange even when the switch is(The number of threads ispressed.
wrong or the tube is too
deformed.)
The internal mechanism of theflanging tool is damaged.

RemedyIncrease the idling time.
(Refer to 3) - 2 on page 25.)
Check the number of threads
and see if the tube is deformed.
(Refer to pages 23-24.)

Check the number of threads
and see if the tube is deformed.
(Refer to pages 23-24.)

Ask for inspection or repairs.
(Refer to pages 27-28.)

Table 1030

Before Asking for Repairs or Servicing
Troubleshooting (RF20SII / RT20SII)
Problem
The cordless flare / flange does
not work even when the switch
is pressed.

Cause
The battery has run out.

RemedyRecharge the battery.
(Refer to pages 15-16.)
Remove the insulators.

There are insulators, such as
dirt, between the battery and thecontacts on the tool.
The wiring or the motor is faulty. Ask for inspection or repairs.
(Refer to pages 27-28.)
Oil oozes from a gap in the main Liquid oil has separated from
This is not a malfunction. Therebody or cone.
the grease and oozes out.
is no functional problem, so
wipe with a clean, dry cloth.

Table 11

Troubleshooting (Charger RF20SC)
Problem
The green lamp does not
flash on and off slowly even ifconnected to the power.
(Storage battery has not been
set up properly)

Cause
The power cord is broken.
Fault with the power supply(breaker etc.).
The charger is out of order.

The red lamp on the charger The temperature of the storage
battery is outside the properis flashing slowly.
range.

The red lamp on the charger There are insulators, such as
dirt, between the battery and thedoes not light up.
contacts on the tool.
(Charging is not possible.)
The red and green lamps on the The battery is out of order.
charger are lit at the same time.
The green lamp does not light
The charger is out of order.
up even if you charge it for morethan two hours.
(Charging is not completed)

RemedyReplace the power cord.
Check the power supply.
Ask for inspection or repairs.
(Refer to pages 27-28.)
Ensure that you operate within
the chargeable temperature
range for the battery. (10 - 40°C)
Remove the insulators.

Replace the battery.
Ask for inspection or repairs.
(Refer to pages 27-28.)

Table 1231

Optional
Accessories
for RF20SII
Optional
Accessories
for RF20SII
Optional accessories are also sold separately as below.
1) Clamp for flaring (Fig. 38)
Code No. 424950
Used when flaring copper tube.
Liners and cones for flaring copper tube are required.
Although it is possible to cope with different tube sizes
by replacing just the liner with an appropriate one, we
recommend you flare ¼”, ⅜”, ½”, ⅝” or ¾” diametercopper tubes using a clamp with a suitable liner as one
set.

Fig. 38

2) Liners for flaring (Fig. 39)
Part No.
424850424852424853424854424855Model
New refrigerant class 2 liner ¼" (6.35 mm)
New refrigerant class 2 liner ⅜" (9.52 mm)
New refrigerant class 2 liner ½" (12.70 mm)
New refrigerant class 2 liner ⅝" (15.88 mm)
New refrigerant class 2 liner ¾" (19.05 mm)

Fig. 39

These liners are used for ¼”, ⅜”, ½”, ⅝” and ¾” copper
tubes, respectively.
Purchasing a liner together with a clamp as a set saves
labour when replacing liners.
3) Batteries (Lithium-ion batteries) (Fig. 40)
Code No. 424987
For convenience, keep a spare battery.
No other manufacturer’s battery can be used.
Fig. 404) Charger (Fig. 41)
Code No. 424985 (AC220-230 V) C-plug
424961 (AC100-120 V) A-plug
424981 (AC100-240 V) SE-plug KC spec.
No other manufacturer’s charger can be used.

32

Fig. 41

Optional Accessories for RF20SII
5) Carrying case (Fig. 42)
Code No. 424893

Fig. 426) Flanging tool set (Fig. 43)
Code No. 424980*By using the tool set, the RF20SII can be used as aflanging tool. It is used for flanging stainless flexible
tubes for water supply.
Contents:
Flanging cone
1
Clamp with liner for ½” 1 Set
Clamp with liner for ¾” 1 Set
Hex key 2.5 mm
1Bag
1Fig. 43

7) RB tube cutter Model N28 (Fig. 44)
Code No. 427128

Fig. 448) Scraper (Fig. 45)
Code No. 471991

Fig. 45

33

Optional
Accessories
for RT20SII
Optional
Accessories
for RT20SII
Optional accessories are also sold separately as below.
1) Clamp for flanging (Fig. 46)
Code No. 424975
Used when flanging stainless flexible tube.
Liners and cones for flanging stainless flexible tube are
required.

Fig. 46

When flaring copper tube with the RT20SII, separate
clamps, liners and cones for flaring copper tube are
required. (Refer to Figs. 38-39, Fig. 51)
Although it is possible to cope with different tube sizes
by replacing just the liner with an appropriate one, we
recommend you flange ½”, and ¾” diameter stainlessflexible tubes using a clamp with a suitable liner as oneset.
2) Liners for flanging (Fig. 47)
Part No.
Model
424777 Flanging liner ½" (16.8 mm)
424778 Flanging liner ¾" (20 mm)
These liners are used for ½” and ¾” stainless flexible
tubes, respectively. Purchasing a liner together with aclamp as a set saves labour when replacing liners.

Fig. 473) Batteries (Lithium-ion batteries) (Fig. 48)
Code No. 424987
For convenience, keep a spare battery.
No other manufacturer’s battery can be used.
Fig. 484) Charger (Fig. 49)
Code No. 424985 (AC220-230 V) C-plug
424961 (AC100-120 V) A-plug
424981 (AC100-240 V) SE-Plug KC Spec.
No other manufacturer’s charger can be used.

34

Fig. 49

Optional Accessories for RT20SII
5) Carrying case (Fig. 50)
Code No. 424988

Fig. 506) Flaring cone (Fig. 51)
Part No. DF14
Flare cone used for flaring copper tube.
Refer to page 26 for replacing flare cones.
Fig. 51
7) Flexible tube cutter (Fig. 52)
Part No.

Model
Flexible tube
1703F2*cutter 20
Flexible tube
1713F3cutter 25N
Flexible tube
1713F5cutter Click 25N
Flexible tube
1703F3*cutter 25
Flexible tube
1703F4*cutter 32
Flexible tube
1713F4cutter Mini 32N

Code / Cutter wheel
424200Cutter wheel for Flexible
tube cutter 20

Fig. 52

1703F7
Cutter wheel for Flexible
tube cutter 25 / 32

*Old model

35

Optional
Accessories
for RF20SII& RT20SII
Optional
Accessories
for RF20SII& RT20SII
1) Hook for RF20SII and RT20SII. (Fig. 53)
Part No. 424890- How to use the hook.
Use the hook to hang the flaring tool around yourbelt, etc., moving it to the left or right as needed.

Fig. 53- Attaching the hook. (Fig. 54)
Place the hook on the bottom of the body and tighten
it with a screw.

Hook
Screw

Bottom of bodyFig. 54- Removing and replacing the hook. (Fig. 55)
Use a Phillips screwdriver to remove the screw on
the bottom of the body.
If you use the hook upside down, place the hook as
you like (Fig. 54 or 55), and tighten it with a screw.

CAUTION- When carrying the product hanging from your belt,
make sure the flaring cone is fully retracted.
- If you use the hook, make sure the screw istightened securely so that the tool doesn’t drop off.

Hook
Screw
Bottom of bodyFig. 55

2) Clamp with flaring bar for 1/4”, 3/8”, 1/2” (Fig. 56)
Code No. 424894

Fig. 56

36

Guarantee and Exemption from Liability
1. Should the product happen to break down for no apparent reason, despite normal and correctuse, repairs and service parts shall be provided free of charge as outlined below.
Repairs shall be provided free of charge for a period of one year from date of purchase.
Dates, procedures and methods for providing repairs and service parts shall be decided inconsultation with the customer.
After the one-year guarantee period, all repairs and service parts will be charged.
Repairs may be charged even within the guarantee period under the following circumstances:- if the product has not been used according to the instructions in the Operation Manual- if it has been used for anything other than its intended purpose- if it has not been repaired according to the Operation Manual or if it has been remodeled- if consumables need replacing- if it has been handled in an inappropriate way.
2. REX will accept no responsibility under the following circumstances:- if a malfunction or accident occurs as a result of fire, abnormal fluctuations in voltage,
damage from flood, earthquakes, lightning or other natural disasters, war, conflict, riot,
terrorism or pollution, etc.
- when the product has not been operated according to the Operation Manual- when the product has been used incorrectly, repaired or remodelled inappropriately- when a malfunction or accident results from using a workpiece made on the product, or
leaving it lying around and/or if it is exposed to the elements- when a malfunction or accident results from using a workpiece produced on the producteither while or after connecting it.
3. Any costs incurred by the manufacturer shall not exceed the purchase price of the product.
The terminals on used lithium-ion batteries should be wrapped in insulating tape toprevent short circuits, and should be disposed of in accordance with the relevant,prevailing laws of the country of use.
Disposal-	Electrical power tools, accessories and packaging should be sorted andsubmitted to an environmentally-sound recycling facility. EU countries
only:
Do not dispose of your electrical power tool in household waste. In accordance with the EU
directive on Waste Electrical and Electronic Equipment and its transposition into national law,electrical equipment which is no longer functional must be collected separately for environmentallyfriendly recycling.

Environmental Protection
Observe national regulations on environmentally compatible disposal and on the recycling of
disused machines, packaging and accessories.
Battery packs must not be disposed of with regular waste. Return faulty or used battery packs toyour Rex distributor!
Do not allow battery packs to come into contact with water!
For EU countries only: Never dispose of power tools in your household waste!
In accordance with European Guideline 2002/96/EC on used electronic and electric equipment
and its implementation in national legal systems, used power tools must be collected separately
and handed in for environmentally compatible recycling. Before disposal, discharge the battery
pack in the power tool.
Prevent the contacts from short circuiting (e.g. by protecting them with adhesive tape).

37

Overseas Sales Dept. & Factory :1-9-3, Hishiya-Higashi, Higashi-Osaka 578-0948 Japan
Tel.: +81 - (0)72 - 961 - 9820 Fax.: +81 - (0)72 - 961 - 9878
URL https://www.rexind.co.jp

Specifications, colour, etc. may be changed without prior notification.

9V880-E2
RF/RT20SII
2308R 0600