Manual Bosch PSR12 (page 12 of 72) (English, German, Dutch, Danish, French, Italian, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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12 | English

2 609 140 790 | (4.4.11) Bosch Power Tools

Hold the rear sleeve 3 of the keyless chuck 1 tight and turn the

front sleeve 2 in rotation direction n, until the tool can be in-

serted. Insert the tool.

Hold the rear sleeve 3 of the keyless chuck 1 tight and firmly

tighten the front sleeve 2 by hand in rotation direction o, un-

til the locking action (click) is heard. The drill chuck is locked

automatically.

The locking is released again to remove the tool when the

front sleeve 2 is turned in the opposite direction.

Replacing the Drill Chuck

For machines without spindle lock, the drill chuck must be re-

placed through an authorized after-sales service agent for

Bosch power tools.

The drill chuck must be tightened with a tightening

torque of approx. 30–35 Nm.

Dust/Chip Extraction

f Dusts from materials such as lead-containing coatings,

some wood types, minerals and metal can be harmful to

one’s health. Touching or breathing-in the dusts can cause

allergic reactions and/or lead to respiratory infections of

the user or bystanders.

Certain dusts, such as oak or beech dust, are considered

as carcinogenic, especially in connection with wood-treat-

ment additives (chromate, wood preservative). Materials

containing asbestos may only be worked by specialists.

– Provide for good ventilation of the working place.

– It is recommended to wear a P2 filter-class respirator.

Observe the relevant regulations in your country for the

materials to be worked.

f Prevent dust accumulation at the workplace. Dusts can

easily ignite.

Operation

Starting Operation

Inserting the Battery

f Use only original Bosch O-pack batteries with the volt-

age given on the type plate of your machine. The use of

other batteries can lead to injuries and danger of fire.

Set the rotational direction switch 11 to the centre position in

order to avoid unintentional starting. Insert the charged bat-

tery 9 into the handle so that it can be felt to engage and faces

flush against the handle.

Reversing the Rotational Direction (see figure B)

The rotational direction switch 11 is used to reverse the rota-

tional direction of the machine. However, this is not possible

with the On/Off switch 12 actuated.

Right Rotation: For drilling and driving in screws, push the

rotational direction switch 11 left to the stop.

The indicator for right rotation 5 lights up when the

On/Off switch 12 is actuated.

Left Rotation: For loosening or unscrewing screws, push the

rotational direction switch 11 right to the stop.

The indicator for left rotation 6 lights up when the

On/Off switch 12 is actuated.

Setting the Torque

The required torque can be preselected in 10 steps with the

torque preselection ring 4. With the correct setting, the insert

tool is stopped as soon as the screw is screwed flush into the

material or when the set torque is reached.

Select a higher setting when driving out screws, or set to the

symbol “Drilling”.

Drilling

The safety clutch is deactivated in the “Drill-

ing” position.

Switching On and Off

To start the machine, press the On/Off switch 12 and keep it

pressed.

The power light 10 lights up when the On/Off switch 12 is

halfway or fully depressed, and enables illumination of the

screwing location in unfavourable light conditions.

To switch off the machine, release the On/Off switch 12.

Adjusting the Speed

The speed of the switched on power tool can be variably adjust-

ed, depending on how far the On/Off switch 12 is pressed.

Light pressure on the On/Off switch 12 results in a low rota-

tional speed. Further pressure on the switch results in an in-

crease in speed.

Run-on Brake

When the On/Off switch 12 is released, the chuck brakes to a

stop, thus preventing the run-on of the tool.

When driving in screws, wait until the screw is screwed in

flush with the material and then release the On/Off switch 12.

By doing so, the head of the screw does not penetrate into the

material.

Working Advice

f Apply the power tool to the screw only when it is

switched off. Rotating tool inserts can slip off.

After longer periods of working at low speed, allow the ma-

chine to cool down by running it for approx. 3 minutes at max-

imum speed with no load.

For drilling in metal, use only perfectly sharpened HSS drill

bits (HSS=high-speed steel). The appropriate quality is guar-

anteed by the Bosch accessories program.

Before screwing larger, longer screws into hard materials, it is

advisable to predrill a pilot hole with the core diameter of the

thread to approx.

of the screw length.

Maintenance and Service

Maintenance and Cleaning

f Before any work on the machine (e. g., maintenance,

tool change, etc.) as well as during transport and stor-

age, set the rotational direction switch to the centre

position. Unintentional actuation of the On/Off switch can

lead to injuries.

OBJ_BUCH-149-004.book Page 12 Monday, April 4, 2011 10:30 AM

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Bosch PSR12 Manual

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