SPZ-252A2t◎ Thank you for purchasing our products.
◎ Before using, please read Instruction manual carefully, and use the machinesafety by following the instructions.
◎ After reading, please keep it where anyone can utilize.

ＭＥＡＮＩＮＧ ＯＦ ＳＩＧＮＡＬ ＷＡＲＤＳ ＷＡＲＮＩＮＧ ＆ ＣＡＵＴＩＯＮ
The instruction manual includes tow signal words ； ＷＡＲＮＩＮＧ ＆ ＣＡＵＴＩＯＮ which aremeant as follows.
ＷＡＲＮＩＮＧ : It is assumed that if the user use the machine wrongly, it would be the risks
that the user could be died or injured.
ＣＡＵＴＩＯＮ : It is assumed that if the user use the machine wrongly, it would be the risks
that the user could remain the disabled or damage for the materials.

"CAUTION" might cause the serious accidents depending on the situations. Since we mention
the important notices, please strictly follow the instruction in order to avoid the accidents.

“Diamond core drill” is described as “Core drill” in context.
“Diamond core bit” is described as “Core drill” in context.

－1－

１．WARNING AND CAUTION【１】 Safety Notice for Electric Tools ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ２【２】 Notes for Usage of Core Drill ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ４
２．DESCRIPTION ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

７

３．SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ８
４．STANDARD ACCESSORIES ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ８
５．APPLICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・

８

６．GENERAL DRAWING AND SPECIFICATIONS IN OPERATION ・・・・・・・・・・・・・・・・・・・・・・

９

７．OPERATIONAL INSTRUCTIONS【１】 Anchoring Core Drill ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １０【２】 Anchoring Core Drill by Anchor Bolt ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １０
８．MAINTENANCE AND SERVICING【１】 Maintenance ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １２【２】 Regular Servicing ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １２
９．FOR REPAIRING ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １５
10．WARRANTY ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ １５

１. WARNING AND CAUTION◎ To avoid the accidents such as fire, electric shock and personally injury, make sure to follow all
instruction "Safety notice for electric tools" and "Notes for usage of core drill".
◎ Before using, please read "WARNING & CAUTION", and follow the instructions◎ After reading, save the manual in that anyone can utilize as for the reference.

【１】 Safety Notice for Electric Tools

WARNING

1. Do not use for other than specified purposes.
2. No one allow to get close to the working area except the workers.
◎ No one allow to contact to the electric tools and cord except the workers.
3. Avoid dangerous environments.
◎ Do not use the electric tools in the rain, moisten and wet place.
◎ Keep working area lightly.
◎ Do not use the machine where there are flammable gas or flammable liquid.
◎ Cluttered work areas invite accidents.
4. Wear appropriate work clothes.
◎ Do not wear the loose clothing or jewelries in order to avoid to being caught in the rotatingparts.
◎ Wear rubber gloves and slip stopper footwear.
◎ Wear cap or hair cover in case that you have long hair.
5. Wear safety glasses.
◎ Wear safety glasses during working. If there are many dust, please wear the dust mask.
6. Do not work with improperly posture.
◎ Fix the footing and maintain the balance at all times.
7. Work carefully without staying alert.
◎ When using the electric tools, please operate carefully by considering operation methods, how to
use and surrounding area.
◎ Do not come close to the rotating parts. It will be dangerous to being caught in or injured.
◎ Be careful for not to tuck the hands and the foots into the moving parts or connecting parts.
◎ Do not use machine when you are tired or distracted.

－2－ WARNING
8. Be careful for receiving electric shocks.
◎ During operation, be careful for not to contact your body to the objects which are grounded suchas microwave and refrigerator and so on.
◎ Use power source equipped with earth leakage breaker.
9. Do not treat the cords and the hoses roughly.
◎ Do not carry the electric tool by holding the cord.
◎ Do not remove the machines by pulling the cord from the power receptacle.
◎ Do not get close the cord near the heat, oil and sharp objects.
10. Use CONSEC recommended accessories and options.
◎ When you use the accessories and the options which are not listed in the manual or CONSEC's
catalogue, it might cause the accidents or personal injury. Please do not use the accessories andthe options which CONSEC does not recommend.
11. Inspect for the damaged parts.
◎ Before using, please inspect the protection cover and other parts damages carefully, and makesure that whether the machine operate properly and the designed functions work or not.
◎ Check for alignment, binding of moving parts, parts damages, mounting, and any other conditions
that may affect operation.
◎ Regarding the exchange or the repair for the damaged parts, please follow the instruction.
◎ When there are no instructions in the manual, please contact to the local distributors forrepairing.
◎ Do not use the electric tool if the switch does not turn on or off.
◎ If the switch is broken, please contact to the local distributors for repairing.
12. Turn the electric tool off and remove the plug from the power supply as following cases.
◎ When the machines is not used or being repaired.
◎ When exchanging the options such as blade or core bits.
◎ In case that you can anticipate other hazardous situations.
13. Remove the key or the wrench for sure.
◎ Before turning on the switch, please make sure that the key and the wrench which are used forthe inspection and adjusting are removed.
14. The electric machines are maintained carefully.
◎ Regarding exchanging the options, please follow the instruction.
◎ Keep the grip dry and clean, and avoid the oil or grease.
◎ Inspect the cord regularly. In case that there are damages, please contact to the distributors forrepairing.
◎ In case that you use the extended cord, inspect it regularly. If there are damages, please
replace it.
15. In case that you do not use the tools, please store it appropriately.
◎ Store the place where keep children away, locking is available and dried place.

－3－



WARNING

16. Avoid accidental starting.
◎ Do not carry the tools with connecting to the power supply.
◎ Before plugging the plug into the power supply, please make sure that the switch is off.
17. Use an appropriate extension cord for outdoors.
◎ In case that you use it in outdoors, please use the extension cord of cab tire cord or cab tire
cable.
18. Use the appropriate tools according to your work.
◎ Do not use the small electric tools and accessories for the work which is done by using the large
electric tools.
19. Contact CONSEC's sales (service) reprehensive for repairing of the electric tools.
◎ The machine is manufactured in complaisance with applicable safety standards.
Do not remodel machine and tool.
◎ In case an unauthorized person repairs it, it might cause the machine failure, accident or
personal injury.
◎ Contact to the local distributors for repairing.

【２】 Notes for Usage of Core Drill(In case of combination with CONSEC's original pole base.)

WARNING

1. Check for the embedded conduit etc.
◎ In case that you contact to the electric wire or conduit in that there are electric current, you
may receive the electric shocks.
◎ Before drilling the wall or the floor, check for the embedded conduit etc adequately.
2. Asbestos is the harmful to human beings. In case that you drill containing such materials,please follow
the applicable laws and regulations, and take a measure for dust control.
3. Be sure to wear the rubber gloves and the rubber shoes.
◎ Since this machine uses the water, be sure to wear the rubber gloves and the rubber shoes.
4. Do not use for the ceiling plane.
◎ Since the core drill uses the water, it is extremely dangerous to drill for the ceiling plane due toflowing the water into the inside of motor.
5. Regarding the operation of high-place work, please follow the applicable laws and regulations.
◎ Secure the safe scaffold, and do not operate the machine 1.5m higher than the scaffold.
◎ In case that you work at high place, secure the enough scaffold space and secured scaffold.
◎ In case that you work at high place, keep any person away under your working area.

－4－



WARNING

6. Be careful for the safety of the penetration side.
◎ When drilling for the penetration, cutting core bit might fall out or the cutting water might beleaked. Therefore, please do the safeguard and the drain water handling in order not to avoid tohit the human beings or objects. Then, please start operating.
7. Use the proper voltage which is indicated on the nameplate.
◎ In case that you apply for the voltage which is over the indicated voltage, it will cause theaccidents.
8. Fix the pole base properly.
◎ It is extremely important to fix the pole base securely. If it is not fixed securely, the core bit
might be damaged by rattling of core drill or jammed.
9. Use the water collector for sure.
◎ Use water collector pad for sure in order to avoid the water flowing into the inside of motor by
flying apart the water during operation.
◎ When using water collector pad, please install it adequately in order not to leak the water.
10. Do not contact to the rotating core bit and main shaft.
◎ Do not contact your hands and body to the rotating core bit and main shaft. It might be caught
in or injured.
11. Do not block the air hole of motor, and do not put the materials into the air hole.
12. Turn the switch off immediately if any abnormality is found.
◎ When the core bit stops or you hear the strange noise during the operation, please turnswitch off immediately.
13. Do not use the core bit which has a outshoot.
◎ If the rotating objects has a outshoot, it might be the risk for being caught in or injured.
14. Do not use the core bit which exceeds the maximum diameter of core bit.

－5－



CAUTION

1. Do not overload with core drill.
◎ Use the machine according to the machine capacity of specifications in order to use safely
and efficiently.
2. When drilling, please feed the water for sure.
◎ Overheating of core bit reduces not only drilling performance but also its life.
So make sure to keep feeding water during drilling operation.
◎ Use clean water only. Using the dirty water may cause machine failure.
3. Do not turn on the motor with core bit facing to the drilling surface.
◎ It causes the damages for core bit and core drill.
4. When starting the drilling, please wait until the rotating is increased.
◎ Regarding the drilling work, turn the switch on and wait until the rotating is increased fully.
5. Do not stop rotating of core bit by forcing the power on the feeding handle during drilling, and do notlock the core bit.
◎ It might cause the damages for the chip of core bit and core drill.
6. When releasing your hands from the feeding handle, please make sue that lock dial is tighten, then,
fix the drill head.
7. When loosening lock dial, please hold the feeding handle in order not to move the drill head.

－6－

２. DESCRIPTION

353

Motor

Clamp Adjust Bolt
（Hex. Socket Set Screw）
257
Cord (5m)

Plug
446

Water Cock

Switch(Built-in Circuit Breaker)

Carbon Cap

Name Plate

Clamp Adjust Bolt
（Hex. Socket Set Screw）

Lock Dial

Feeding Handle

Grip
A Rod Screw－7－３. SPECIFICATIONS
Model

SPZ-252A2t

Motor

Single phase series commutator motor

Power Supply

Single-phase A.C. 110V 60Hz

Rated Current

15A

Max. Output

2400W

No Load Speed

520/1200min-1

Max. Bit Dia.

254mm (10")

Core Bit Installing Screw

A Rod Screw

Drill Head Weight (Excluding cord)

12.4kg

４. STANDARD ACCESSORIES◎ Tool Pouch ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 1◎ Single-ended Wrench 46mm ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 1◎ Single-ended Wrench 36mm ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 1◎ Ratchet Wrench 17×21mm ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 1◎ Hex. Bar Wrench 4mm ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 1◎ Instruction Manual ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 1

５. APPLICATIONSThis tool is core drill for drilling in concrete.
◎ Core drilling in concrete for road, dam, tunnel and bridge construction.
◎ Sampling test pieces.
◎ Core drilling of pilot hole for guard rail post and fence post.
◎ Core drilling in concrete for wiring and plumbing for air conditioning, telephone, electricity,water and gas supply.

－8－

６. GENERAL DRAWINGAND SPECIFICATIONS IN OPERATION◎ Core drill installed on to □49 Pole Base.

□49 Pole Base

Drill Head

Feeding Handle

Core Bit

Bolt
Square Washer
Hex. NutLeveling Bolt

Water Collector

Water Collector Fitting－9－

７. OPERATIONAL INSTRUCTIONS(Explanation referring to general drawing during operation.)【１】 Anchoring Core Drill◎ Core drill can be anchored by means of anchor bolt, vacuum pad or support jack.
Follow the below procedures for bolt anchor method.

【２】 Anchoring Core Drill by Anchor Bolt
１．Installation of anchor bolt
1) Drill anchor bolt hole, using a hammer drill.
2) Set anchor bolt (W1/2) into the hole.

２．Installation of core drill1) Screw bolt (W1/2) into anchor bolt.
2) Insert bolt (W1/2) into the slot of pole base and fasten square washer and hex. nut (W1/2)
3) Install drill head onto pole.
4) Adjust the position of pole base so as to align main shaft with the hole to be drilled.
5) Adjust leveling with leveling bolts so as to eliminate rattling of pole base.
After completion of adjustment, secure leveling bolt with wing nut.
6) Tighten hex. nut (W1/2) to secure pole base.
7) Set desired rotating speed with speed change knob.

Model
SPZ-252A2t

Speed change Position
min-1

Applicable Core Bit Dia.
inch

mm

HI

1200

1 ～ 4

27 ～ 110

LOW

520

4 ～ 10110 ～ 254

３．Installation of core bit◎ Thread core bit onto main shaft.

４．Installation of water collector
 WARNING
Be sure to use water collector to prevent spattered water from getting into motor during
operation.
◎ Secure water collector with water collector fitting.

５．Arrangement for water disposal◎ Receive water into a bucket by connecting a hose with drain port of water collector or suck water
through drain port using a vacuum cleaner.

－10－

６．Arrangement for water supply◎ Connect a hose between a water source and water cock using hose coupler.

 WARNING
Do not stop water feeding during operation.

７．Core drilling WARNING
When drilling a through-hole, take proper measures to provide for protection on the other side
where core bit penetrates.

1) Turn switch off and plug in.

 WARNING
To prevent accidental starting, make certain that motor switch is in OFF position before
plugging your machine.

2) Turn on a water tap and open water cock slowly, adjusting water flow.

 CAUTION
Allow water to flow at about 2L per minute.

3) Turn switch on to drill with feeding handle. Start drilling by turning feeding handle slowly until core
bit comes in light contact with work surface.
While starting to drill, apply light pressure on feeding handle until drill bit penetrates to 5-10mm
depth. Then keep drilling under uniform pressure.

 WARNING
1. If motor is switched on with bit resting on the work surface, it causes core bit fracturing
or core drill failure, resting in hazardous accidents.
2. Wait until the rotation of core bit increases to the full and then start drilling.
3. Since drill bit often wanders at the starting, turn feeding handle slowly applying lightpressure to prevent bit wandering. Allow water to flow at about 2L per minute.

８．After completion of drilling
1) Remove water hose and water collector.
2) Remove core bit.
3) Remove drill head from pole base.
4) Loosen hex. nut and dismount pole base.
－11－

８. MAINTENANCE AND SERVICING【１】 Maintenance1) Clean the surface of the machine after using.
Regarding the outer frame of the drill head, the part of the gear case is made of aluminum, and thepart of the Motor is made of the sturdy synthetic resin.
If gasoline, thinner, petroleum or kerosene are adhered to the outer frame of the drill head, thesurface of the drill head will be damaged.
When you clean the out frame of the drill head, use the dried cloth or the cloth which is soakedwith the soapy water.
2) Maintenance for motor.
After entire operation is over, secure drill head onto pole base, run motor with no-load and drive
dirt and dust out of motor interior.

【２】 Regular Servicing
１．Checking of carbon brush1) How to check
Remove carbon brush cap using slotted screw driveretc., and take carbon brush out. After replacement,

Carbon Brushsecure carbon cap.
６2) Replacement○ The excessive abrasion of carbon brushes causes
motor failure. Check regularly, when they are wornup to the wear limit line (6mm), replace with newones.
○ Keep them clean for free sliding in brush holder.

 CAUTION
Insist on identical carbon brushes in replacement.

－12－

２．Checking and adjustment of clamp◎ Set drill head onto pole base. While moving feeding
handle, tighten 4 pieces of hex. socket set screw onclamp in good balance with hex. bar wrench(4mm) andadjust the gap between pole and clamp.
As for the degree of adjustment from ① side, firsttighten hex. socket set screw till the rattling stops.
As for the degree of adjustment from ② side, firsttighten hex. socket set screw till the rattling stops.
Then loosen them back by one quarter of one①②

turning.(When core drill is fixed on the floor, drill head
do not slide (fall) down because of its weight.)

 CAUTION
If hex. socket set screws are fastened too tight, feeding handle gets heavy. When slide
plate is worn and starts to rattle, replace it.

３．Checking and adjustment of clutch◎ As friction plates wear out, the clutch becomes easy to slip. When this happens, readjust the
clutch using clutch adjusting tools.
1) Set the speed change at HI (1200min-1).
2) Remove hex. plug 1/8” from gear case by hex. bar wrench (5mm).
3) Insert the tip of clutch adjusting pin into the hole, where the plug 1/8” is removed, in parallel withthe main shaft. While doing this, slowly turn the main shaft by hand and further insert clutch
adjusting pin till the main shaft is locked.
4) Holding clutch adjusting pin by your hand, hang the spanner 36mm on the main shaft. Using torquewrench, fasten the clutch.
Model

Tightening
TorqueTightening
Direction

SPZ-252A2t

72N･m

Left

Hex .Bar Wrench
Clutch Adjusting Pin
Torque Wrench
Right CAUTION
Tightening more than specified value mightcause the damage to clutch adjusting pin andgeared motor.

－13－

Left
Spanner 36mm

5) After completion of 1) ～ 4), pull out clutch adjusting
pin. Hang single-ended wrench 36mm on the main shaft
and then fix the main shaft by making a handle of thewrench touch the pole. Make sure that the main shaft islocked. Turn the motor switch on for several seconds andmake sure that the clutch is slipping without motor
locking.

 WARNING
Be careful for the direction of single-ended wrench 36mm marking a hit at pole.
(See the drawing)6) After marking sure the clutch is slipping, install hex. plug 1/8” back into the hole.

４． Checking of attaching screws◎ Check every attaching screws for loosening periodically. If found loose, tighten it.

－14－9. FOR REPAIRING◎ For repairing your machine, contact CONSEC's authorized representative.

10 . WARRANTY
We will guarantee the HAKKEN core drill machine for 6 months from the date of delivery. During thisperiod we will warranty material and production defects free of charge. We are not responsible for any
other damage direct nor indirect other than this. This warranty does not cover normal wear and tear,overloading, non-compliance with the operating instructions and intervention by unauthorized persons or
the use of parts from other companies.

－15－

－16－

－17－

Main office: 4-6-8 Shoko Center Nishi-ku Hiroshima 733-0833 Japan

International Department : 1-7-5-1, Sakaimachi, Naka-ku, Hiroshima, 730-0853 Japan
Phone : 81-82-297-3231
E1960-0－18－

Fax : 81-82-297-3230