Hitachi DS 7DT Mode D'emploi page 9

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.
5. Confirm the cap position (see Fig. 8)
The tightening power of this unit can be adjusted
according to the cap position, at which the cap is
set.
(1) For using the unit as a screw driver, set the cap
white line to one of the numerals "1" to "5" on
the outer frame.
(2) For use as a drill, set the white line at the drill mark
" " (see Fig. 8).
CAUTION
Set the cap white line at one of either the numerals
or drill marks.
6. Tightening power adjustment
(1) Tightening power
Tightening power should correspond in its intensity
to the screw diameter. When too strong power is
used, the screw head may be broken or be injured.
Be sure to adjust the cap position according to the
screw diameter.
(2) Tightening power indication
Tightening power should be changed according to
the screw type and the materials to be tightened.
Guidance of the tightening power is indicated on
the outer frame of this unit with numerals "1", "2",
Work
Wood: 15 mm
Drilling Steel: 10 mm
Aluminum: 10 mm
Machine screw: 6 mm
Driving Nut: 5 mm
Wood screw: 5.1 mm (diameter) x 35 mm (length)
8. How to select tightening power and rotational speed
Use
Machine screw
Driving
Wood screw
Wood
Drilling
Metal
CAUTION
The selection examples shown in Table 2 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.
Table 1
Usable range
Table 2
Cap Position
LOW (Low speed)
For 4 mm or smaller diameter
1 – 5
screws.
For 3.5 mm or smaller nominal
1 – 5
diameter screws.
For 13 mm or larger diameters.
"3", "4" and "5". The minimum power is from "1"
position and bigger the value the stronger is the
power (see Fig. 8).
(3) How to adjust the tightening power
Rotate the cap and set to one of the numerals.
Adjust the power by cap rotation in such a way that
when the power is too strong, set to the next
smaller numeral and set to the next larger numeral
when too weak.
CAUTIONS
The motor rotation may be locked to cease while
the unit is used as drill. While operating the driver
drill, take care not to lock the motor.
When setting the shift knob to "HIGH" (high speed)
and the position of the cap is "4" or "5", it may
happen that the clutch does not engaged and that
the motor is locked. In such a case, please set the
shift knob to "LOW" (low speed).
If the motor is locked, immediately turn the power
off. If the motor is locked for a while, the motor
or battery may be burnt.
Too long hammering may cause the screw broken
due to excessive tightening.
A buzzing noise is produced when the motor is
about to rotate; This is only a noise, not a machine
failure. (DS7DV only)
7. The scope and suggestions for uses
The usable scope for various types of work based
on the mechanical structure of this unit is shown
below.
Use for drilling purpose.
Use the bit and socket matching the screw
diameter.
Use after drilling a preparatory hole.
Rotating speed selection (Position of the shift knob)
––––––
English
Suggestions
HIGH (High speed)
For 5 mm or larger diameter
screws.
For 3.8 mm or larger nominal
diameter screws.
For 13 mm or smaller
diameters.
For drilling with an iron
working drill.
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