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7
PRECAUTIONS FOR CORDLESS IMPACT
WRENCH
1. This is a portable tool for tightening and loosening
bolts and nuts. Use it only for these operation.
2. Use the earplugs if using for a long time.
3. One-hand operation is extremely dangerous; hold
the unit firmly with both hands when operating.
4. Check that the socket is not cracked or broken.
Broken or cracked sockets are dangerous. Check
the socket before using it.
5. Secure the socket with the socket pin and the ring.
If the socket pin or ring securing the socket is damaged,
the socket may come off from the impact wrench,
which is quite dangerous. Do not use socket pins
or rings that are deformed, worn out, cracked, or in
any other way damaged. Always make sure to install
the socket pin and ring in the correct position.
6. Check the tightening torque.
The appropriate torque for tightening a bolt
depends on the material the bolt is made of, its
dimensions, grade, etc.
Also, the tightening torque generated by this impact
wrench depends on the materials and dimensions
of the bolt, how long the impact wrench is applied
for the way in which the socket is installed, etc.
Also the torque when the battery has just been
charged and when it is about to run out are slightly
different. Use a torque wrench to check that the
bolt has been tightened with the appropriate torque.
7. Stop the impact wrench before switching the
direction of rotation. Always release the switch
and wait for impact wrench to stop before
switching the direction of rotation.
8. Never touch the turning part.
Do not allow the turning socket section to get near
your hands or any other part of your body. You could
be cut or caught in the socket. Also, be careful not
to touch the socket after using continuously it for a
long time. It gets quite hot and could burn you.
9. Never let the impact wrench turn without a load
when using the universal joint.
If the socket turns without being connected to a load,
the universal joint causes the socket to turn wildly.
You could get hurt or the movement of the socket
could shake the impact wrench so much as to
make you drop it.
10. Always charge the battery at a temperature of 0
– 40°C.
A temperature of less than 0°C will result in over
charging which is dangerous. The battery cannot
be charged at a temperature greater than 40°C.
The most suitable temperature for charging is
that of 20 – 25°C.
11. Do not use the charger continuously.
When one charging is completed, leave the charger
for about 15 minutes before the next charging of
battery.
12. Do not allow foreign matter to enter the hole for
connecting the rechargeable battery.
13. Never disassemble the rechargeable battery and
charger.
14. Never short-circuit the rechargeable battery.
Short-circuiting the battery will cause a great
electric current and overheat. It results in burn
or damage to the battery.
15. Do not dispose of the battery in fire.
If the battery burnt, it may explode.
16. Do not insert object into the air ventilation slots
of the charger.
Inserting metal objects or inflammables into the
charger air ventilation slots will result in electrical
shock hazard or damaged charger.
17. Bring the battery to the shop from which it was
purchased as soon as the post-charging battery
life becomes too short for practical use. Do not
dispose of the exhausted battery.
18. Using an exhausted battery will damage the
charger.
MODEL
WH12DM2: with charger and case
WH9DM2: with charger and case
WH12DMR: with charger and case
WR12DM2: with charger and case
WR9DM2: with charger and case
SPECIFICATIONS
Cordless Impact Driver
Model WH9DM2 (9.6 V) WH12DM2 (12 V) WH12DMR (12 V)
No-load speed 0 – 2800 min
–1
0 – 2600 min
–1
Capacity M4 – M8 (Small screw)
M5 – M12 (Ordinary bolt)
M5 – M10 (High tension bolt)
Tightening torque
Rechargeable battery
EB9B: Ni-Cd battery, 9.6 V
EB1220BL: Ni-Cd battery, 12 V
(2.0 Ah 8 cells) (2.0 Ah 10 cells)
EB926H: Ni-MH battery, 9.6 V
EB1226HL: Ni-MH battery, 12 V
(2.6 Ah 8 cells) (2.6 Ah 10 cells)
EB930H: Ni-MH battery, 9.6 V
EB1230HL: Ni-MH battery, 12 V
(3.0 Ah 8 cells) (3.0 Ah 10 cells)
Weight 1.2 kg 1.6 kg
Maximum 80 N·m
{820 kgf·cm}
Tightening is M12 high
tension bolt (strength
grade 12.9), when fully
charged at 20°C temp.
Tightening time: 3 sec.
Maximum 135 N·m Maximum 130 N·m
{1375 kgf·cm}
{1330 kgf·cm}
Tightening is M14 high tension bolt (strength grade
12.9), when fully charged at 20°C temp.
Tightening time: 3 sec.