Manual Bosch pbh 2900 fre (page 28 of 158) (English, German, Dutch, Danish, French, Italian, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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28 | English

1 609 929 T39 | (19.11.10) Bosch Power Tools

Switching On and Off

–To start the machine, press the On/Off

switch 8.

–To lock the On/Off switch, keep it pressed

and additionally push the lock-on button 7.

–To switch off the machine, release the

On/Off switch 8. When the On/Off switch 8

is locked, press it first and then release it.

Setting the Speed/Impact Rate

The speed/impact rate of the switched on pow-

er tool can be variably adjusted, depending on

how far the On/Off switch 8 is pressed.

Light pressure on the On/Off switch 8 results in

low speed/impact rate. Further pressure on the

switch increases the speed/impact rate.

Preselecting the Speed/Impact Frequency

The required speed can be preselected with the

thumbwheel 9 (also while running).

Due to the limitation, the On/Off switch 8 can

only be pulled through to the preset limit.

Gear Selection, Mechanical (PBH 3000-2 FRE)

Two speed ranges can be preselected with the

gear selector 13.

1st gear:

Low speed range; for hammer drilling, chisel-

ling, drilling with large drilling diameter, screw-

driving and thread cutting.

2nd gear:

High speed range; for drilling with small drilling

diameter.

– To change gear, push the release button 11

on the mode selector switch 12 and turn the

mode selector switch to the “drilling” posi-

tion. Then push the release button 14 on the

gear selector 13 and turn the gear selector to

2nd gear.

Note: The mode selector switch 12 may only be

turned when the machine is switched off. The

machine should also be switched off when turn-

ing the gear selector 13.

Hammer drilling and chiselling is possible only

in 1st gear. In these operating modes, the spe-

cial shape of the gear selector 13 and mode se-

lector switch 12 do not allow switching to

2nd gear.

Before changing the operating mode from drill-

ing to hammer drilling, Vario-Lock or chiselling,

the gear selector 13 must be set back to

1st gear.

Safety Clutch

f If the tool insert becomes caught or

jammed, the drive to the drill spindle is in-

terrupted. Because of the forces that occur,

always hold the power tool firmly with both

hands and provide for a secure stance.

f If the power tool jams, switch the machine

off and loosen the tool insert. When switch-

ing the machine on with the drilling tool

jammed, high reaction torques can occur.

Working Advice

Rotation Direction for Chiselling

For chiselling, always set the rotation direction

to right rotation. This prevents increased wear

of the carbon brushes.

Changing the Chiselling Position (Vario-Lock)

The chisel can be locked in 36 positions. In this

manner, the optimum working position can be

set for each application.

– Insert the chisel into the tool holder.

– Turn the mode selector switch 12 to the

“Vario-Lock” position (see “Setting the Oper-

ating Mode”, page 27).

– Turn the tool holder to the desired chiselling

position.

– Turn the mode selector switch 12 to the

“chiselling” position. The tool holder is now

locked.

– For chiselling, set the rotation direction to

right rotation.

OBJ_BUCH-318-003.book Page 28 Friday, November 19, 2010 4:36 PM

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Bosch pbh 2900 fre Manual

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