Hitachi DV 14DVC2, Handling Instructions Manual

Page: 9 / 16

9
6. How to select tightening torque and rotational speed
Table 4
Use
Clutch Dial
Position
Rotating speed selection (Position of the shift knob)
LOW (Low speed) HIGH (High speed)
Driving
Machine screw 1 – 22
For 6 mm or smaller diameter
screws.
For 6 mm or smaller diameter
screws.
Wood screw 1 –
For 6 mm or smaller nominal
diameter screws.
For 3.8 mm or smaller nominal
diameter screws.
Drilling
Brick For 13 mm or smaller diameters.
For 8 mm or smaller diameters.
(DV14DVC2)
For 10 mm or smaller diameters.
(DV18DVC2)
Wood
For 32 mm or smaller diameters.
(DV14DVC2)
For 18 mm or smaller diameters.
(DV14DVC2)
For 38 mm or smaller diameters.
(DV18DVC2)
For 22 mm or smaller diameters.
(DV18DVC2)
Metal
For drilling with a metal working drill
bit.
CAUTION
○
The selection examples shown in Table 4 should be
considered as general standard. As di ff erent types of
tightening screws and di ff erent materials to be tightened
are used in actual works proper adjustments are naturally
necessary.
○
When using the combi drill with a machine screw at HIGH
(high speed), a screw may damage or a bit may loose
due to the tightning torque is too strong. Use the combi
drill at LOW (low speed) when using a machine screw.
NOTE
The use of the battery BCC1412 and BCC1812 in
a cold condition (below 0 degree Centigrade) can
sometimes result in the weakened tightening torque and
reduced amount of work. This, however, is a temporary
phenomenon, and returns to normal when the battery
warms up.
7. Mounting and dismounting of the bit
(1) After inserting a driver bit, etc. into the keyless drill chuck,
fi rmly grasp the ring and tighten the sleeve by turning it
toward the right (in the clockwise direction as viewed
from the front) (See Fig. 9 ).
○
If the sleeve becomes loose during operation, tighten it
further. The tightening force becomes stronger when the
sleeve is tightened additionally.
(2) Dismounting the bit
Firmly grasp the ring and loosen the sleeve by turning
it toward the left (in the counter-clockwise direction as
viewed from the front) (See Fig. 9 ).
CAUTION
When it is no longer possible to loosen the sleeve, use a
vise or similar instrument to secure the bit. Set the clutch
mode between 1 and 11 and then turn the sleeve to the
loose side (left side) while operating the clutch. It should
be easy now to loosen the sleeve.
8. Con fi rm that the battery is mounted correctly
9. Check the rotational direction
The bit rotates clockwise (viewed from the rear side) by
pushing the R-side of the selector button.
The L-side of the selector button is pushed to turn the bit
counterclockwise (See Fig. 10 ) (The and marks
are provided on the body).
CAUTION
Always use this unit with clockwise rotation, when using it
as an impact drill.
10. Switch operation
○
When the trigger switch is depressed, the tool rotates.
When the trigger is released, the tool stops.
○
The rotational speed of the drill can be controlled by
varying the amount that the trigger switch is pulled.
Speed is low when the trigger switch is pulled slightly and
increases as the trigger switch is pulled more.
NOTE
A buzzing noise is produced when the motor is about to
rotate; This is only a noise, not a machine failure.
11. For drilling into brick
Excessive pressing force never increases drilling speed.
It will not only damage the drill tip or reduce working
e ffi ciency, but could also shorten the service life of drill
bit. Operate the combi drill within 10-15 kg pressing force
while drilling into brick.
12. Using the bit holder
CAUTION
○
Stow the bit in the speci fi ed location on the tool. If the tool
is used with the bit stowed improperly, the bit may fall and
cause bodily injury.
○
Do not stow bits that are of a di ff erent length, gauge or
dimension than the plus driver bit (65 mm long) included
in the STANDARD ACCESSORIES.
The bit may fall and cause bodily injury.
(1) Removing the bit
Securely hold the main unit and pull out the bit by holding
the tip with your thumb ( Fig. 11 ).
(2) Installing the Bit
Install the bit with steps opposite of when removing.
Insert the bit so that the right and left sides are equal, as
shown in Fig. 12
MAINTENANCE AND INSPECTION
1. Inspecting the tool
Since use of as dull tool will degrade e ffi ciency and cause
possible motor malfunction, sharpen or replace the tool
as soon as abrasion is noted.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that
they are properly tightened. Should any of the screws be
loose, retighten them immediately. Failure to do so could
result in serious hazard.
000Book̲DV14DVC2̲Eng.indb 9 000Book̲DV14DVC2̲Eng.indb 9 2013/02/27 14:09:32 2013/02/27 14:09:32