Hitachi WF 4DY Handling Instructions Manual page 32

English
other than that specified or a car battery to the
power tool.
25. Do not use any transformer containing a booster.
26. Do not charge the battery from an engine electric
generator or DC power supply.
27. Always charge indoors. As the charger and battery
heat-up slightly during charging, charge the battery
in a place not exposed to direct sunlight, whch
has low humidity and is well ventilated.
28. When working in a high place, pay attention to
activities below. Before commencing, ensure that
there are no people below.
PRECAUTIONS ON USING CORDLESS
AUTOMATIC SCREWDRIVER
1. This automatic screwdriver is designed for
tightening and loosenig screws. 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. Use original bits specifically for the automatic
screwdriver.
Use no bits other than the original bits specifically
for the automatic screwdriver. Use of any other
bit can result in screws sticking out and screw feed
malfunctioning.
5. After installing the driver bit, pull lightly out the
bit to make sure that it does not come loose. If
the bit is not installed properly, it can come loose
during use, which can be dangerous.
6. Screw in screws with the main unit held straight.
If the driver is slanted relative to the screw, the
screw head can be damaged and the bit worn.
Moreover, the prescribed torque is not transmitted
to the screw, resulting in screws left sticking out.
Place the drive straight against the screw and
screw in.
7. Use the prescribed screws.
Do not use any other screws. They can cause
abnormal work (screws fallen over or sticking out)
and break downs (screw jamming and bit wear).
8. Protect your eyes with protective glasses.
Always wear protective glasses while working.
SPECIFICATIONS
POWER TOOL
Model
No-load speed
Screw size
Capacity
Screw length
Tightening torque
Rechargeable battery (EB12)
Bit shank size
Weight
31
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
WF4DY
0 ~ 2000/min (at 20°C, with fully charged battery)
4 mm
25 – 41 mm
Maximum 900 kg-cm
Tightening is M12 high tension bolt (strength grade 12.9), when
fully charged in 20°C temp. Tightening time: 3 sec.
Use hexagonal socket.
Ni-Cd battery, 12V. No. of times rechargeable: about 500
6.35 mm Hex.
2.0 kg
Drilling scatters plaster powder and tape dust,
which are dangerous if they get into your eyes
Watch out for wires and pipes in walls and ceilings.
When working on floors, walls, or ceilings, check
for wires and pipes ahead of time. Work carefully
to avoid shocks and explosions.
When the screw feed attachment is removed,
always use the correct driver bit for the screw size.
When the screw feed attachment is removed, if
the screwdriver is positioned at an angle against
the tightening screw, the head of the screw may
be damaged or the fixed tightening force will not
transfer to the screw. Always position the tightening
screw and the screwdriver at a straight angle and
then tighten the screw.
Always charge the battery at a temperature of 5
~ 40°C.
A temperature of less than 5°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.
Do not use the charger continuously.
When one charging is completed, leave the charger
for about 15 minutes before the next charging of
battery.
Do not allow foreign matter to enter the hole for
connecting the rechargeable battery.
Never disassemble the rechargeable battery and
charger.
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.
Do not dispose of the battery in fire.
If the battery burnt, it may explode.
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.
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.
Using an exhausted battery will damage the
charger.