Manual Hitachi dv 12dv (page 9 of 38) (German, Dutch, French, Italian, Spanish)

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6. How to select tightening power and rotational speed

CAUTION

䡬 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.

䡬 When using the impact 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 impact drill at LOW (low speed)

when using a machine screw.

7. Mounting and dismounting of the bit.

(1) Mounting the bit

After inserting a driver bit, etc. into the keyless drill

chuck, firmly grasp the ring and tighten the sleeve

by turning it toward the right (in the clockwise

direction as viewed from the front). (See Fig. 8)

䡬 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. 8)

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.

NOTE

䡬 There is a plus driver bit on side of the main unit.

The bit can be removed by pulling it forward. After

using the bit, make sure to firmly attach it to the

main body again.

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. 9). (The

and

marks are provided on the body.)

CAUTION:

Always use this unit with clockwise rotation, when

using it as an impact drill.

Table 2

Use Cap Position

Rotating speed selection (Position of the shift knob)

Machine screw

1 — 22

Driving

Wood screw

1 —

Brick

Drilling Wood

Metal

LOW (Low speed)

For 4 mm or smaller

diameter screw.

For 5.1 mm or smaller

nominal diameter screw.

———

For 18 mm or smaller

diameters.

For drilling with a

metal working drill bit

HIGH (High speed)

For 6 mm or smaller

diameter screw.

For 3.8 mm or smaller

nominal diameter screw.

For drilling with a

carbide tipped drill bit.

For 18 mm or smaller

diameters.

———

10. Switch operation

When the trigger switch is depressed, the tool

rotates. When the trigger is released, the tool stops.

䡬 The rotational speed of the drill can be controlled

by varying the amount that the trigger is pulled.

Speed is low when the trigger switch is pulled

slightly and increases as the trigger switch is pulled

more.

NOTE

䡬 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 efficiency, but could also shorten the service

life of drill bit. Operate the impact drill within 10-

15 kg pressing force while drilling into brick.

12. Using the hook

The provided hook is so designed that it can be

installed and removed on either right or left by one

touch.

Use it correctly as occasion demands.

(1) Installing the hook

To begin with, remove the battery from the tool.

Subsequently, insert the hook so that the grooves

at 2 locations of the hook and the 2 protrusions

of the hook installing part of the tool come together,

check and confirm that the hook is securely fixed,

and then install the battery. (See Figs. 10 and 11)

(2) Removing the hook

Remove the hook following the order of installation

in reverse.

CAUTION

䡬 Fix the hook securely before use. Any use with

imperfect installation of the hook as is can result

in injuries.

䡬 When you use the hook, be absolutely sure that

it is in a state where the battery is installed. If you

use it in a state where the battery is removed, the

hook can come off or drop and result in injuries.

䡬 When you carry it hanging on a waist belt, do not

install it on the drill chuck, but you can do so on

the driver bit. If drills and the like with a sharp

point are installed, injuries can result.

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Hitachi dv 12dv Manual

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