Bosch GBM 10 Original Instructions Manual page 13

OBJ_BUCH-804-004.book Page 13 Friday, May 9, 2014 7:52 AM
Henk Becker Helmut Heinzelmann
Executive Vice President Head of Product Certification
Engineering PT/ETM9
Robert Bosch GmbH, Power Tools Division
70764 Leinfelden-Echterdingen, Germany
20.03.2014
Assembly
 Before any work on the machine itself, pull the mains
plug.
Changing the Tool
 Wear protective gloves when changing the tool. The
drill chuck can become very hot during longer work peri-
ods.
Keyless Chuck (see figure A)
Hold the rear sleeve 3 of the keyless chuck 1 tight and turn the
front sleeve 2 in rotation direction , 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 , 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.
Screwdriver Tools (see figure B)
When working with screwdriver bits 9, a universal bit holder
10 should always be used. Use only screwdriver bits that fit
the screw head.
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. 31–35 Nm.
Dust/Chip Extraction
 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 mate-
rials to be worked.
 Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Bosch Power Tools
Operation
Starting Operation
 Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Reversing the rotational direction (GBM 10 RE)
(see figure C)
The rotational direction switch 7 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 6 actuated.
Right Rotation: For drilling and driving in screws, push the
rotational direction switch 7 left to the stop.
Left Rotation: For loosening and unscrewing screws and
nuts, press the rotational direction switch 7 through to the
right stop.
Switching On and Off
To start the machine, press the On/Off switch 6 and keep it
pressed.
To lock the pressed On/Off switch 6, press the lock-on button
5.
To switch off the machine, release the On/Off switch 6 or
when it is locked with the lock-on button 5, briefly press the
On/Off switch 6 and then release it.
To save energy, only switch the power tool on when using it.
Adjusting the Speed (GBM 10 RE)
The speed of the switched on power tool can be variably ad-
justed, depending on how far the On/Off switch 6 is pressed.
Light pressure on the On/Off switch 6 results in a low rotation-
al speed. Further pressure on the switch results in an increase
in speed.
Working Advice
 Apply the power tool to the screw/nut only when it is
switched off. Rotating tool inserts can slip off.
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.
Twist drills from 2.5–10 mm can easily be sharpened with
the drill bit sharpener (see accessories).
We recommend the use of a drill stand (see accessories) for
work where greater precision is particularly required.
The machine vice, which is available as an accessory, enables
secure clamping of workpieces. This prevents the workpiece
from turning and any accidents this would cause.
Belt Clip
With the belt clip 4, the machine can be hung onto a belt. The
user has both hands free and the machine is always at hand.
English | 13
1 609 92A 0N7 | (9.5.14)