Hitachi Koki DS 14DVF Safety & Instruction Manual page 18

English
4. Change rotation speed
Operate the shift knob to change the rotational speed. Move the shift knob in the direction
of the arrow (see Figs. 7 and 8).
When the shift knob is set to "LOW", the drill rotates at a low speed. When set to
"HIGH", the drill rotates at a high speed.
CAUTION:
When changing the rotational speed with the shift knob, confirm that the switch is off.
Changing the speed while the motor is rotating will damage the gears.
When a large force is required for operation (operations indicated in the following
chart) set the shift knob to "LOW". If "HIGH" is set and the unit is used, it may cause
the motor to burn out or malfunction prematurely.
Model
Metal Drilling
Wood Drilling
Wood Screw Tightening
5. Confirm the cap position (see Fig. 9)
Cap
Weak
Strong
Fig. 9
18
High speed
Shift knob
Fig. 7
When the diameter of the hole exceeds 1/4"(6.5mm).
When the diameter of the hole exceeds 15/32"(12mm).
When the size of the wood screw exceeds 5/32"(3.8mm)
diameter × 1-31/32"(50mm).
Triangle
mark
mark
(1) When using this unit as a screwdriver, line up the
(2) When using this unit as a drill, line up the cap drill
Low speed
Table 2
DS12DVF / DS14DVF
The tightening torque of this unit can be adjusted
according to the cap position, at which the cap is
set.
one of the numbers "1, 3, 5 ... 22" on the cap, or
the black dot, with the triangle mark on the outer
body.
mark " " with the triangle mark on the outer
body.
Shift knob
Fig. 8