Hitachi DV 18DGL Safety Instructions And Instruction Manual page 16

English
6. How to select tightening torque and rotational speed
Use
Machine screw
Driving
Wood screw
Brick
Wood
Drilling
Metal
CAUTION
●
The selection examples shown in Table 6 should
be considered as general standard. As different
types of tightening screws and different materials
to be tightened are used in actual works proper
adjustments are naturally necessary.
●
When using the hammer 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 hammer drill at LOW (low
speed) when using a machine screw.
NOTE
The use of the battery BSL1815S 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, firmly 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
Loosen the sleeve by turning it toward the left (in
the counter-clockwise direction as viewed from the
front).
16
Table 6
Clutch dial Rotating speed selection (Position of the shift knob)
Position LOW (Low speed)
For 1/4" (6 mm) or smaller
1 – 22
diameter screws.
For 5/16" (8 mm) or smaller
1 –
nominal diameter screws.
For 1/2" (13 mm) or smaller
diameters.
For 1-1/2" (38 mm) or smaller
diameters.
Loose
Tighten
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. Confirm 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
marks are provided on the selector button.)
R
Trigger switch
HIGH (High speed)
For 1/4" (6 mm) or smaller
diameter screws.
For 31/64" (4.8 mm) or
smaller nominal diameter
screws.
For 13/32" (10 mm) or
smaller diameters.
For 7/8" (22 mm) or smaller
diameters.
For drilling with a metal
working drill bit.
Sleeve
Fig. 9
Selector button
Fig. 10
and
L