COPPER TUBE TOOLSTAINLESS FLEXIBLE TUBE TOOLOPERATION MANUALORIGINAL INSTRUCTIONS

RT20S

RF20S

Be 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 manual where the operator can refer toit whenever necessary.

Date of purchase:
Distributor:

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 this manual carefully.
Before using the product, therefore, make sure you read the manual from start to finish,
paying particular attention to the Safety Considerations on pages 2 - 4 and Precautions on pages 5 - 7.
To avoid accident and injury, never use for any purposes other than those described in this manual.
Should you need further advice, contact your distributor or REX Industries Co., Ltd.

CONTENTS
General Safety Warnings for Power Tools............................................................. 1
Safety Considerations .................................................................................................................... 2
Precautions for using RF20S/RT20S.......................................................................... 5
Precautions for using the charger/battery.............................................................. 6
Main Parts, Specifications for RF20S ...................................................................... 8
Main Parts, Specifications for RT20S ...................................................................... 9Standard Accessories, Use.................................................................................................10
Operation Guide................................................................................................................................11
Getting Ready- Charging the battery.........................................................................................................11
RF20S: Flaring copper tube
(1) Cutting and scraping the tube..........................................................................12(2) Clamping the tube ......................................................................................................13(3) Flaring ......................................................................................................................................15(4) Removing the tube ..........................................................................................................16
RT20S: Flanging(1) Cutting flexible tube....................................................................................................17(2) Setting the clamp .......................................................................................................17(3) Flanging .................................................................................................................................18- Replacing the flaring or flanging cone ..........................................................19
Maintenance and Care .............................................................................................................20
Servicing and Repairs ................................................................................................................20
Before Asking for Repairs or Servicing ........................................................................21-Troubleshooting (RF20S) ...............................................................................................21-Troubleshooting (RT20S) ...............................................................................................22-Troubleshooting (RF20S/RT20S) .........................................................................22-Troubleshooting (Charger RF20SC) .................................................................22
Optional Accessories for RF20S .........................................................................................23
Optional Accessories for RT20S .........................................................................................24

Definitions of

WARNING and

CAUTION

In this operation manual, warnings are divided into
CAUTION .
WARNING andWARNING : indicates actions which could possibily result in death or severe injury to the user
if the product is used incorrectly.
CAUTION : indicates actions which could possibly result in injury to the user, or physicaldamage, if the product is used incorrectly.
Even items labelled
CAUTION 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, you can download a copy from our website; http://www.rexind.co.jp- 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 thismanual may be different to the product you have purchased.

General Safety Warnings for Power Tools
WARNING
Read all safety warnings and all instructions. Failure to follow the warnings and instructions
may result in electric shock, fire and/or serious injury. Save all warnings and instructions for
future reference! The term "power tool" in the warnings refers to your mains-operated (corded)
power tool or 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 flammable liquids, 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 withearthed (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 and refrigerators.
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 cordaway 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. Using a cord suitable foroutdoor use 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.
- Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power
tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while
operating power tools may result in serious personal injury.
- Use personal protective equipment. Always wear eye protection. Protective equipment such as 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 is in the off-position before
connecting to a power source and/or battery pack, picking up or carrying the tool. Carrying power tools with yourfinger 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 arotating part of the power tool may result in personal injury.
- Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in
unexpected situations.
- Dress appropriately. Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving
parts. Loose clothes, jewellery or long 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 dust-related hazards.

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 withthe 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 ofstarting the power tool accidentally.
- Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool orthese instructions to operate power tool. Power tools are dangerous in the hands of untrained users.
- Maintain power tools regularly. Check for misalignment or jamming of moving parts, breakage of parts and anyother condition that may affect the power tool’s operation. If damaged, have it repaired before use.
Many accidents are caused by poor maintainance.

1General Safety Warnings for Power Tools
WARNING- Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges 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 theworking conditions and the work to be performed. Using the product for anything other than its intended use canresult in a hazardous situation.

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 riskof 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 a fire.
- 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 the eyes, seek
medical help immediately.
Fluid that leaks from the battery may cause irritation or burn you.

6. Servicing- Have your power tool serviced by a qualified repair professional, using only identical replacement parts.
This will ensure that the safety of the power tool is maintained.

Safety Considerations
WARNING
1. Ensure you use the correct voltage.
- Be sure to use the voltage indicated on the name plate of the main unit or in the operation manual.
Using the product at a voltage different from that indicated can result in overheating, smoke or fire.

2. Check the switch is OFF before inserting the plug into the power supply socket.
- If the plug is inserted into the power supply when the switch is ON, the product may start operating abruptly andis liable to cause accidents. Be sure to check the switch is OFF.

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 or snow. 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.

2

Safety Considerations
WARNING
6. In the following cases, turn the product OFF and pull the plug out of the power supply socket.
- When the product is not in use or parts are changed, repaired, cleaned or inspected.
- When accessories are changed.
- When hazards are expected (including electric power failure).
If the product is plugged in, it may start operating unexpectedly, causing accidents.

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 machine and keep it at its full potential. Using a machine that is not
fully operational may cause injury.
- Check symptoms against the items in the section entitled, "Troubleshooting" at the end of this manual andobserve 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 an inspection 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.

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 or fire.

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, jewellery 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 getcaught 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 getting caught 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 have been removed.
Failure to pay attention to this may result in an accident or injury.

3

Safety Considerations
WARNING
15. Operate the product with great care.
- Always pay great attention to how you handle and operate the product and to the surrounding 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.
- Use common sense. Irrational behaviour can cause accidents and injuries.

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 with sharp edges.
- Take care not to tread on the cord, pull the cord or apply unnecessary force resulting in damage 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 you bought them or a REX
distributor 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 to prevent electric shock,short-circuit or fire.

18. Check for damaged parts.
- Before using the product, carefully inspect the external appearance of the product and other parts 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 and any other abnormalities.
- When replacing or repairing broken parts, follow the operation manual. If no instructions are specified in theoperation manual, ask the store where you bought the product or a REX distributor for repairs.
- Do not use the power cord or plug if damaged. If you leave them as is, there is a danger of electric shock, shortcircuit or fire. Ask the store where you bought the product or a REX distributor for repairs.
- Do not use if the Stop and Start 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 the store where you bought them or a REX distributor 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.

4Precautions for using RF20S/RT20SWARNING
1. Hold securely!
- When you switch on and the flare cone starts rotating, the hand you hold the product with may 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 P14 of this operation manual.

CAUTION
1. The flanging tool RT20S 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.

Precautions for 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.
Never use the charger for any other rechargeable tool or battery.
The use of any other combination of 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 and charge 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 an electric shock.
Humidity should also be avoided as it can weaken the charger or the motor’s insulation.

5

Precautions for using the charger/battery
WARNING
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 from the 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 used within an ambient temperatureof 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 tocharge, or fully charge, a battery that is still hot after continuous use, etc.
Wait until the battery has cooled down before charging again.

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; the LED 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 temperature and 40 to 80% charged.
Be sure to remove the battery from the unit 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 unit if you try to disassemble it.
- The charger has a built-in condenser and other electronic parts; disassembling the unit will lead to electrical shock
and damage.
- If either the charger or battery unit does not function properly do not disassemble to attempt a repair yourself.
Always return to the store where you bought them or to a REX distributor 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 unit 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 unit.
Use in as dust-free a location as possible.

6Precautions for using the charger/battery
WARNING
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 unit
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 insulation and 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 with local laws and regulations
governing such items.

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 your shipping company for details.

22. To prevent the charger and battery from emitting smoking, overheating, igniting or thebattery 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 high temperatures 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 it from 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 cancause 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 to restore 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 the charger, wait until the temperature
is within a range of 10 to 40ºC and start again. This is the range 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.

7

Main Parts, Specifications for RF20S
Main Parts
Flaring cone

Ventilation hole

Flaring tool

Power cord
Green
lamp

ChargerRed
lamp

FWD/REVswitchBattery
mounting socket

Trigger
Strap
Lithium-ion
battery

Hex key

Carrying case

Clamp with liner
COPPERHex socket
button headscrew
(M4 x 8)

Latch

TUBE

TOOL

STAINLESS FLE

XIBL

E TUB

OPER
ATION

E TOO
L

MANU
AL

RF20S
RT20S

Be sureOperatio to readn Man thisusing
the flarinualg/flanbefore
ging tool.

- Be sure- To ensur to hand
- Notee safe this opera
beforand efficie tion manue using- Be surethe flaring
al to thent use,read
user.
it when to keep
/flangtheing tool. the manu
everneces manual where
al thoro
sary.
ughly
the opera
tor can
refer
to

Date
of purchase:
Distributo
r:

Year
Month

Clamp liner
Stopper plate

Operation manualFig. 

Specifications (Flaring tool RF20S)
Copper tube (O/OL material) JIS H 3300 C1220T

Applicable tube
Applicable tube size
Flare
Processing method
Switches
Cone speed
Power
Potential No. of flares

Nominal diameter
Outer diameter (mm)

¼"

⅜"

½"

⅝"**

¾"**

6.35

9.52

12.70

15.88

19.05

Supports Class 2 refrigerant (Supports R410A, R32)
ࠉ
Complies with shapes described in JIS B 8607. (Referred to elsewhere.)
Eccentric cone (constant-pressure plunge rotation)
Stepless speed control trigger and FWD/REV switch
0 - 280/min-1 (rpm)DC motor½": Approx. 120 tube ends per fully charged battery.
(May vary depending on usage.)

Processing time

Approx. 5 sec.

Vibration*

0.667 m/s2

Uncertainty (K)*

1.5 m/s2*Warning: The vibration emission during actual use of the power tool can differ fromthe declared total value depending on the ways in which the tool is used.
**May be sold separately.
8

Table 

Main Parts, Specifications for RT20S
Main Parts
Flanging cone
Flanging tool

Ventilation holePower cord

Green
lamp

ChargerRed
lamp

FWD/REVswitchBattery
mounting socket

Trigger
Strap

Lithium-ion
battery

Hex key

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

TUBE
TOO

Carrying caseL

STAINLESS FLE

XIBL

E TUB

E TOO
L

OPER
ATION
MA

NUAL

RF20S

Latch

RT20S

Be sureOperatio to readn Man thisusing
the flarin
ual beforeg/flan- Be sureging tool.
- To ensur to hand
- Notee safe this opera
beforand efficie tion manue using- Be surethe flaring
al to thent use,read
user.
it when to keep
/flangtheing tool. the manu
everneces manual where
al thoro
sary.
ughly
the opera
tor can
refer
Date
to
of

Clamp liner

purch
ase:
Distributo
r:

Year
Month

Operation manualFig. 2

Specifications (Flanging tool RT20S)
Applicable tube

Flexible stainless steel water tube
SUS304, SUS316L（for mains water supply）

Processing time

Ｍ-13 (½") Outer diameter 16.7- 16.8mm
Ｍ-15 (¾") Outer diameter 20mm
2 or 3 threads
Eccentric cone (constant-pressure plunge rotation)
Stepless speed control trigger and FWD/REV switch
0 - 280/min-1 (rpm)DC motor¾" (3 threads): Approx. 120 tube ends per fully charged battery.
ࠉࠉࠉࠉࠉࠉ(May vary depending on usage.)
Approx. 5 sec.

Vibration*
Uncertainty(K)*0.667 m/s2
1.5 m/s2

Applicable tube size
No. of flange threads
Processing method
Switches
Cone speed(min-1 /rpm)
Power
Potential No. of flanges*Warning: The vibration emission during actual use of the power tool can differ fromthe declared total value depending on the ways in which the tool is used.

Table 2

9

Standard Accessories, Use (For RF20S/RT20S)
Sound pressure level at operator’s position
Noise level
Uncertainty (K)81.5 dB (A)
92.5 dB (A)
3 dB
Table 3

Battery : Model RB20SB
Battery type
Voltage
Capacity
Charging time
No. of recharges
Chargable temperature
Circuit protector

Lithium-ion battery
DC 10.8 V
2000 mAh
Approx. 70 minutes (depending on use)
㸨Charge is approx. 80㸣 complete in approx. 55 min.
Approx. 500 times (depending on use)
0 - 40ºC
Over-discharge protection(Discharging stops when any one cell is reduced to 2.5 V)
Temperature protection(Battery cannot be charged below 0ºC or above 40ºC.)
Table 4Charger : Model RB20SC
Battery type
Voltage
Charging system
Charging voltage
Charging current
Chargable temperature
Circuit protector

REX Lithium-ion battery RF20SB (No. 424987)
AC100 - 240 V (50/60Hz) 60 VA
Constant current and constant voltage system
DC 10.8V
2000 mA
0 - 40ºC
Overcharge protection (4.25 V/cell)
Overcurrent protection (7A fuse)
Table 5

Standard Accessories (Size / Weight)

Weight(kg) Qty.

Name

Size (W x D x H mm)

1

RF20S Flaring/RT20S Flanging tool

131 × 66 × 230 (131 × 66 × 264)**with batteries inserted

1,220(1,405)

2
3
4
5
6
7
8
9
10

Battery
Charger (without power supply cord)
Power cord
Clamp (with ¼" liner)
Clamp (with ⅜" liner) *RF20S only
Clamp (with ½" liner)
Carrying caseHex key (Diameter: 2.5 mm)
Operation Manual

60 × 54 × 85
146 × 109 × 61
2000 (cord length)

185
335
85

84 × 84 × 45

Approx.
350

440 × 366 × 113
18 × 63 × 3
210 × 145 × 2

1,600
4
30

Use

1
1
1
1
1
1
1
1
1
1
Table 6

- RF20S: Flaring copper tube. Flanging flexible stainless steel tube. (requires flanging tool
set 424980 sold separately; refer to Page 23, Fig. 43).
- RT20S: Flanging flexible stainless steel tube.
10

(For RF20S/RT20S)

Operation Guide

Getting Ready:
Charging the battery

Main unit

1. Remove the battery from the main unit by pressing thelatch on the battery. (Fig. 3)

CAUTION

Latch- Hold the main unit firmly and remove the battery.
- Charge the battery once the tool starts to lose power.

Battery
2. Connect the power cord and charger, and then insert
the plug into the mains.
Check that the green lamp is slowly flashing on and off.
This indicates that the battery is being charged. (Fig. 4)

Fig. 3
Plug
Green lamp

CAUTION- Note: The input voltage is AC100 - 240 V (50/60Hz).
- Do not use a generator to charge the battery.
- Do not carry the charger with the power cord; it may
drop off.
Power cord

3. Insert the battery as far as it will go into the mounting
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 is 80%
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)

ChargerFig. 4

Battery

Green lamp

You can check the status of the battery and charger
from the red and green lamps. (Table 7)

Mark

80%

Red lamp

Battery
mounting socket

Fig. 5Charger status

Green lamp Red lamp
FlashesslowlyOff

Chargeable

Off

On

Charges the battery 0 - 80% of its capacity (about 55 minutes)

Flashes
quickly

Off

Charges the battery 80 - 100% of its capacity (about 15 minutes)

On

Off

Fully charged

Off

FlashesslowlyThe temperature of the battery is outside the chargeable range (below 0㽅㻯, or above 40㽅㻯)On

On

Unable to charge (Defective battery etc.)

Table 7

11

Operation Guide (For RF20S/RT20S)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 theperformance and life of the battery and may evencause a leakage or generate excessive heat.
- The battery or the charger may get slightly hot during
charging; choose a dry and well-ventilated place thatis not exposed to direct sunlight.
- If you intend to charge another battery, leave thecharger 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 then attach itto the main unit. (Fig. 6)

CAUTION

Main unit

Latch

Battery
Fig. 6

Cutting

Tube
Cutter wheel- If the battery cannot be fully charged even after
following the correct procedure, the battery may bedead. Attempting to charge a dead battery may damage
the charger.

Knob
A
Rotate the cutter around the tube
Fig. 7

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

Mark for cutting

1. Mark a line where you wish to cut the tube, and thenplace the tube on the cutter. (Fig. 7)* Tighten the cutter so that the blade lightly presses
against the tube.
* Cut the tube where it is least flat or bent. Tubes thatare flat or have lots of bends will affect the flare.
2. From where the cutter blade is placed on the tube,
turn the knob ¼ of a turn in the direction of A in
the diagram and then rotate the unit 2 or 3 times
back and forth through 90°. Then score the tube byturning the unit one full rotation around the tube to
make a mark for cutting. (Fig. 8)

2 or 3 rotations
back and forth;then 1 fullrotationA

About ¼ ofa turnFig. 8

Knob: about 1/8thof a turn

3. When feeding the cutter blade, the knob should beturned slowly at a rate of approximately 3 to 4
rotations of the tube cutter. (Fig. 9)
Cutter: three to four rotations
Fig. 912

(Flaring copper tube)

CAUTION- If you feed the blade too quickly, the tube may be
deformed and the tube cannot be flared properly.
(Fig. 10 right)

Operation Guide

OK

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

Cut end

4. Use a scraper, reamer or file etc. to remove burrs fromthe end of the tube. (Fig. 11)

Innerdiameterof the tube

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, the tube
cannot be flared properly, and a gas leak may result.
- Do not make any scratches on the inner surface of the
tube to be flared.
Damage or scratches may remain even after the tube
is flared.

(2) Clamping the tube

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

Fig.10

Remove burrs
Tube

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

Scraper

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

CAUTION- Before processing, check that the end of the copper
tube is not deformed. If it is deformed, you will not beable to process the flare normally.
- Before processing, confirm that there are no burrs left
on or in the copper tube. If any burrs remain, the surfacesthat are flared may become dented and cause a gas leak.
- Pay attention to the direction of the flare nut.

Fig. 11

Tube

Flare nut
Fig. 12
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

Preparing Do not leave a gap
the tube between the tube and
Clamp
Tube

the stopper plate
Opening or
closing theclamp- If there is a space between the tube and the stopper
plate, the resulting flare diameter will be smaller.
- Remove any metal chips from the liner, the flare cone
and the tube.
*To open or close the clamp, turn the knob as indicated by
the arrow. (Fig. 13)

Fig. 13

13

Operation Guide (Flaring copper tube)
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 move that easily.

CAUTION

Stopper plate- To confirm that the stopper plate is in perfect contact
with the tube, try to raise the stopper plate slightly withyour finger. If the stopper plate is easy to shift, it implies
that there is a space between the stopper plate and thetube, 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 sothat the tube will not become loose or slip.
Therefore, when clamping the tube, the exterior of
the tube will be scratched, but this will not pose
any problem.

Clamp
liner

Tube
Fig. 14

TightenClamp knob

4.When the liner is replaced to change sizes, besure to fit the new liner properly in the clamp
before securing it with the socket bolt. (Fig. 17)
*Secure the clamp against the liner using the 2.5 mm
hex spanner provided and a hex socket button headscrew (M4x8).

Clamp liner
Fig. 15

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 gap

Large protrusionin the flare.
Fig. 16

When the liner is replaced to change
sizes, secure the clamp against theliner.
Hex socket
button headscrew (M4x8)

Clamp
Fit
Clamp
liner

Large step

Fit

Large protrusionin the flare.
Fig. 18

14

Hex socket
button headscrew (M4x8)

Clamp
Fig. 17

(Flaring copper tube)

Operation Guide(3) Flaring
1. Attach the clamp, with the tube in it, to the flaring
tool. (Figs. 19-20)*Attach the clamp to the flaring tool by aligning thejoints on the clamp with the recesses in the flaring
tool, and then turn the flaring tool in the direction of
the arrow until you hear a click. (Fig. 20)

Recesses

flare
cone

CAUTION- You cannot set the clamp unless the flare cone isfully retracted.
- When the cone is out, press REV on the FWD/REV
switch and then pull the trigger.
The flare cone will retract while rotating in reverse.
When the flare cone is fully retracted, you will heara clank; release the trigger. (Fig. 20)- Remove any foreign matter (metal chips, etc.) fromthe flare cone, as these could cause scratches on
the inner surface of the flare or a gas leak.

2. Start flaring by pressing FWD on the FWD/REV
switch and pull the trigger.
The amount you pull the trigger affects the rotation
speed, but you should pull the trigger back all
the way.
If you don’t pull the trigger back enough, there
may not be enough torque.
Flaring should be completed within 3 seconds
from when you hear the clutch make a clanking
sound.
Release the trigger to stop the tool rotating.(Fig. 21)

Recesses(Protrusion)

Notch

Front: Flaring tool

Clamp

Fig. 19

Attaching the clamp
Tube

Flaring
tool
ForwardFig. 20
ReverseNeed tooperatethe switch

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 insufficient flaring.
- 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 13.), or reduce the thicknessof the flared tube.

FWD/REVswitchTriggerFig. 21

15

Operation Guide (Flaring copper tube)
3. Press and hold down REV on the FWD/REV switch.
- The flare cone will be retracted while rotating in reverse.
The amount you pull the trigger affects the rotation speed, but you should pull the trigger back all
the way.
If you don’t pull the trigger back enough, there may not be enough torque.
When you hear the clutch make a clanking sound, release the trigger to stop the flaring tool

rotating.

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.

(4) Removing the tube

Removing the clamp

1. Detach the clamp from the flaring tool by reversing
the steps for installation. (Fig. 22)

Flaring tool
Clamp

CAUTION- The clamp cannot be removed unless the flare cone isfully retracted. Avoid removing it forcibly, otherwise thetool may be damaged.
2. Removing the tube
- Loosen the knob to open the clamp, and thenremove the tube. (Fig. 23)*Check the shape and dimensions of the finishedflare are acceptable. (Fig. 24) .
For information on how to deal with each of thesecases, refer to Troubleshooting. (Pg. 21)*Check that there are no foreign bodies such as
chips or oil on the processed pipe. If there are,remove with a clean, dry cloth.

Small flarediameterLarge flarediameterFig. 22
Removing the tube

Clamp
(2)
Knob

(3)
Tube
(1)
Fig. 23

Large protrusion on outer
Scratches on innersurface of flared tube. surface of flared tube.

Large step on outersurface 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 partof a flare joint with refrigerating machine oil and make thefirst 3 or 4 turns of the nut by hand.
2. Use Table 8 opposite as a guide to the torque that should
be applied when connecting a flare nut.
3. To prevent gas leaks, ensure the nut is tightened correctly.

“Tightening torque used for connecting
flare nuts (JIS B 8607) ”
Nominal Actual outer
diameter diameter (mm)

¼"
⅜"
½"
5
8"
¾"

Tightening torque (Nm)

6.35

14 - 20

9.52

40 - 44

12.70

57 - 6215.88

70 - 77

19.05

98 -120
Table 816

(Flanging)Operation Guide

Operation Guide (Flanging)(1) Cutting flexible tubes (Figs. 25, 26)
1. Rotate the grip anticlockwise and retract the cutter blade to
fit the flexible tube to be cut.

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

Cutterwheel
Flexible tube

Roller
2. Turn the grip clockwise so that the cutter blade fits into thecentre of the recess of the flexible tube, and feed in the cutter.

Cutterwheel

3. From where it contacts the recess of the flexible tube ridge,
turn the grip approx. 1/6 to the right, feed in the blade, androtate the cutter a few turns in the direction shown in the figure.
4. After that, cut the pipe in the same way (turn the grip to theright about 1/6 turn, then rotate the cutter 2-3 turns).
5. Check that there are no burrs or deformation where the tube
has been cut.
If there are, then normal flanging will not be possible, which
could result in leakages. (Fig. 26)

Flexible
tube
cutterRotatecutterSupportroller

Grip: 1/6th of a turnFig. 25

Burrs

OK(2) Setting the clamp (Figs. 27-28)
1. Set the clamp so that you place the liner over the second or
third groove from the end of the tube.

1. Place thenut on thetube.

2. Lift the handle and tighten by turning in a clockwise direction.

Fig. 26
2. Place the clamp in
the 2nd or 3rd
groove.
3. Lift up thehandleandtighten.

3. While looking from the side, check that the end of the tube
does not protrude from the clamp.
Fig. 27

CAUTION- If the end of the tube protrudes beyond the clamp, theclamp cannot be set on the flanging tool.
If the end of the tube protrudes beyond the clamp, theposition 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 section of the tube andattach the clamp again.

Clamp

OK

Avoid letting the endof the tube protrude
beyond the clamp.

Fig. 28
17

Operation Guide (Flanging)(3) Flanging (Figs. 29-31)
1. Attach the clamp, with the tube in it, to the flanging
tool. (Figs. 29-31)*Attach the clamp to the flanging tool by aligning thejoints on the clamp with the recesses in the flanging
tool, and then turn the flanging tool in the direction of
the arrow until you hear a click. (Fig. 29)
2. To start flanging, press FWD on the FWD/REV
switch and pull the trigger.
The amount you pull the trigger affects the rotation
speed, but you should pull the trigger back all theway.
If you don’t pull the trigger back enough, there may
not be enough torque.
Flanging should be completed within 3 seconds fromwhen you hear the clutch make a clanking sound.
Release the trigger to stop the tool rotating. (Fig. 30)

Attach the clamp
Tube

Flanging
tool

Fig. 29

Forward

ReverseNeed tooperatethe switch

3. Press and hold down REV on the FWD/REV switch
and pull the trigger.
The flanging cone will retract while rotating inreverse.
As in 2 above, the amount you pull the trigger canaffect the rotation speed, but you should pull thetrigger back all the way.
If you don’t pull it back enough, there may not beenough torque.
Release the switch to stop the tool rotating.

FWD/REVswitchTriggerFig. 30

Inadequate
flanging

4. Remove the clamp in the reverse order to attaching it.
5. Make sure the tube has been flanged correctly.
*If it hasn’t, it can lead to water leaks or electrolytic
corrosion. (Fig.31)*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.

18

OK
Fig. 31-1

Fig. 31-2

(Replacing the flaring or flanging cone)

Operation Guide

The RF20S flaring tool can be used to flange flexible tube by attaching special (optional) accessories.
The RT20S flanging tool can also be used to flare copper tube by attaching special (optional) accessories.

Special accessories (For details, refer to pages 22-23.)

Fig. 32

1. Clamps (for RF20S / for RT20S)

Fig. 34

3. Flaring coneFig. 33

2. Liners

Fig. 35

4. Flanging cone

Replacing the flaring or flanging cone (Fig. 36)
1. Press the FWD / REV switch forward, pull the trigger,
and move the flaring or flanging cone forward as far
as it will go.
2. Remove the battery.
3. Insert a flat-head screwdriver between the cone andthe body of the tool and take out the cone while
taking care not to lose the thrust bearing.

3. Remove thecone with ascrewdriver.
ThrustFlanging
bearingcone
4. Change
the coneand install.
Flaring
cone
Trigger

1. FWD/REV switch

4. Insert the cone until you hear it click into place.
2. Remove the battery.

5. Replace the battery.

Fig. 36WARNING- When replacing the cone, remove the battery fromthe tool, otherwise there could be an accident if thetool starts up suddenly.

19

Maintenance and CareCAUTION- Before inspection or maintenance, be sure to turn OFF the switch and also remove the battery.
If the battery is not removed, it may start unexpectedly, causing serious injury.
- When an abnormality is found during inspection or maintenance, identify the problem referring to thedescriptions 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, orfire, causing serious accidents or injury.

1. Check all screws- Check all screws on a regular basis and tighten any that are loose.
Using the tool 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 in soapy water.
Do not use chlorine-based solvents, gasoline or paint thinner as they may dissolve the plastic.
Also, when using the tool, oil may ooze out from a gap in the main body or cone. This is due tothe separation of liquid oil from the grease used inside the main unit, 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 thetemperature does not exceed 40°C and with the battery
separated from the charger. Keep out of the reach ofchildren.

Grease4. Care of the clamp- If the knob is stiff when you tighten it, apply oil, grease,etc. as shown in the figure on the right. (Fig. 37)
Fig. 37

Servicing and Repairs
This product is produced with great precision; therefore, should it fail to operate normally, do notdisassemble or repair it by yourself; contact your distributor 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.

Availability of
Replacement Parts

20

Replacement parts are maintained for a period of 7 years after productionof this model has been terminated.
Electrical parts, however, will remain available for a period of 5 years.

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

CAUTION- If there is no description of, or instructions regarding, the problem in question in the following table, never try todisassemble 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 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 (RF20S)
ProblemCause

The diameter of the flare is too
small.

The tube end was pinched due tofeeding the blade too quickly when
the tube was cut.
Burrs were left on the tube end.
There was a space between the tube
end and the stopper plate.

Feed the cutter blade more slowly to
cut the tube. (Refer to page 12.)The idling time from when the clutch
started operating was too short.

Increase the idling time.
(Refer to page 15.)

Flaring pressure is diminished.

Ask for inspection or repairs.
(Refer to page 20.)

Tube end is protruding from thestopper plate.

Place the tube so that the tube end isin contact with the stopper plate.
(Refer to page 13.)

The idling time from when the clutch
started operating was excessive.

Decrease the idling time.
(Refer to page 15.)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.)RemedyRemove the burrs. (Refer to page 13.)
Place the tube, taking care not toleave a space between the tube end
and the stopper plate. (Refer to page 13.)Large burrs were left on the tube end. Remove the burrs. (Refer to page 13.)
The idling time from when the clutch
started operating was too short.
Flaring pressure is diminished.

Make the idling time longer.
(Refer to page 15.)

Ask for inspection or repairs.
(Refer to page 20.)

Flaws were made while removing
Flaws other than ring-shaped
ones (vertical flaws, dents, etc.) 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.

Remove the burrs without making
any flaws on the inside of the tube.
(Refer to page 13.)
Remove any dirt or scrap.
(Refer to page 13.)
Ask for inspection or repairs.
(Refer to page 20.)A larger protrusion (0.3 mm ormore) can be seen on theexternal surface of the flare.

The clamp knob wasn’t tightened
enough leaving too much clearance
between the liners.

Tighten the clamp knob until there isno space between the liners.

A larger step (0.3 mm or more)
can be seen on the externalsurface of the flare.

The liner was attached with steps in it. Attach the liner without steps.
(Refer to page 14.)
There was a step (0.3 mm or more)on the surface of the clamp where
the liner was installed.

Ask for inspection or repairs.
(Refer to page 20.)

The flare is not symmetrical.

Flaring was done on a tube that was
cut at an angle.
Flaring was done on a tube that was
too flat or bent.

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

Table 921

Before Asking for Repairs or Servicing
Troubleshooting (RT20S)
Problem
Unsatisfactory shape of the flange.

Cause
The idling time from when the clutch
started operating was too short.

You cannot attach the clamp withthe tube in it to the flanging tool.

The end of the tube is protruding beyond
the clamp. (The number of threads iswrong or the tube is too deformed.)
The end of the tube is protruding beyond
the clamp. (The number of threads iswrong or the tube is too deformed.)

You can hear the sound of the motor
but the flanging tool won’t flangeeven when the trigger is pulled back.

The internal mechanism of theflanging tool is damaged.

RemedyIncrease the idling time.
(Refer to page 18.)
Check the number of threads
and see if the tube is deformed.
(Refer to page 17.)
Check the number of threads
and see if the tube is deformed.
(Refer to page 17.)
Ask for inspection or repairs.
(Refer to page 20.)

Table 10

Troubleshooting (RF20S / RT20S)
Problem
The flaring/flanging tool does notwork even when the trigger is pulledback.

Oil oozes from a gap in the tool or
cone.

Cause
The battery has run out.

RemedyRecharge the battery.
(Refer to page 11.)

There are insulators, such as dirt,
between the battery and the contacts
on the tool.

Remove the insulators.

The wiring or the motor is faulty.

Ask for inspection or repairs.
(Refer to page 20.)

Liquid oil has separated from thegrease and oozes out.

This is not a malfunction.
There is no functional problem,
so wipe with a clean, dry cloth.

Table 11

Troubleshooting (Charger RF20SC)
Problem

Cause

RemedyThe power cord is broken.

Replace the power cord.

Fault with the power supply(breaker etc.).

Check the power supply.

The charger is out of order.

Ask for inspection or repairs.
(Refer to page 20.)

The red lamp on the charger isflashing slowly.

The temperature of the storage
battery is outside the proper range.

Ensure that you operate
within the chargeable temperature
range for the battery. (0 - 40Υ)The red lamp on the charger GRHs
not light up.
(Charging is not possible.)

There are insulators, such as dirt,
between the battery and the contacts
on the tool.

Remove the insulators.

The red and green lamps on the
charger are lit at the same time.

The battery is out of order.

Replace the battery.

The green lamp GRHs not light upeven if you charge it for more than
two hours.
(Charging is not completed)

The charger is out of order.

Ask for inspection or repairs.
(Refer to page 20.)

The green lamp does not flash on
and off slowly even if connected tothe power.
(Storage battery has not been set up
properly)

Table 1222

Optional Accessories for RF20S*Optional accessories are also sold separately as below.
1) Clamp for flaring (Fig. 38)
Part No. 424950

1) Clamp

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", 5 8" or ¾" diametercopper tubes using a clamp with a suitable liner as one set.

Fig. 38

2) Liners

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 5 8" (15.88 mm)
New refrigerant class 2 liner ¾" (19.05 mm)

These liners are used for ¼", ⅜", ½", 5 8" and ¾" copper
tubes, respectively.
Purchasing a liner together with a clamp as a set saves
labour when replacing liners.

Fig. 39

3) Batteries (Lithium-ion batteries)

Fig. 404) Charger3) Batteries (Lithium-ion batteries) (Fig. 40)
Part No. 424987
For convenience, keep a spare battery.
No other manufacturer's battery can be used.
4) Charger (Fig. 41)
Part No. 424985 / 424961 / 424981
No other manufacturer's charger can be used.

Fig. 41

5) Carrying case5) Carrying case (Fig. 42)
Part No. 424959
6) Flanging tool set (Fig. 43)
Part No. 424980*By using the tool sets, the RF20S can be used as aflanging tool. These sets are used for flanging stainlessflexible tubes for water supply, respectively.
Contents:
Flanging cone
1
Clamp for flanging
2
1 Set
Flanging liner for ½"
Flanging liner for ¾"
1 Set
Hex key17) RB tube cutter Model N28 (Fig. 44)
Part No. 427128

Fig. 426) Flanging tool set

Fig. 43

7) RB tube cutter Model N28

Fig. 44

23

Optional Accessories for RT20S*Optional accessories are also sold separately as below.
1) Clamp for flanging (Fig. 45)
Part No. 424975

1) Clamp

Used when flanging stainless flexible tube.
Liners and cones for flanging stainless flexible tube are
required.
*When flaring copper tube with the RT20S, separate
clamps, liners and cones for flaring copper tube are
required. 㸦Refer to Figs. 38-39, Fig.50㸧

Fig. 45

2) Liners

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 one set.
2) Liners for flanging (Fig. 46)

Fig. 463) Batteries (Lithium-ion batteries)

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 a clamp as a set saves
labour when replacing liners.

Fig. 47

4) Charger3) Batteries (Lithium-ion batteries) (Fig. 47)
Part No. 424987
For convenience, keep a spare battery.
No other manufacturer's battery can be used.
4) Charger (Fig. 48)
Part No. 424985 (220-230V)
424961 (100-120V)
424981 (220V special)
No other manufacturer's charger can be used.

Fig. 48

5) Carrying caseFig. 49

5) Carrying case (Fig. 49)
Part No. 424984
6) Flare cone (Fig. 50)
Part No. DF14
Flare cone used for flaring copper tube.
Refer to Pg. 16 for replacing flare cones.

6) Flare coneFig. 50

7) Flexible tube cutter (Fig. 51)
Part No.

Code / Cutter wheel
4242001703F2* Flexible tube cutter 20
Cutter wheel for
1713F3 Flexible tube cutter 25N
Flexible tube cutter
1713F5 Flexible tube cutter Click 25N 20
1703F71703F3* Flexible tube cutter 25
Cutter wheel for
Flexible
tube
cutter32
1703F4*
Flexible tube cutter
1713F4 Flexible tube cutter Mini 32N 20 / 32
*Old model
24

Model

7) Flexible tube cutter 20

Fig. 51

MEMO

25

Guarantee and Exemption from Liability
1. Should the product happen to break down for no apparent reason, despite normal and correct use,
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 in consultation
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 itlying around and/or if it is exposed to the elements- when a malfunction or accident results from using a workpiece produced on the product either
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 to prevent shortcircuits, and should be disposed of in accordance with the relevant, prevailing laws of the countryof use.

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 to your 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 infor 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).

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
http://www.rexind.co.jp
Specifications, colour, etc. may be changed without prior notification.

9V310-E1
RF/RT20S
2105D 0300