Bosch Professional GBM 13 HRE Manual Original página 13

Changing the drill chuck
Pull the plug out of the socket before carrying out any
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work on the power tool.
Remove the securing screw (see figure D)
A securing screw (10) protects the keyed chuck (1) from be-
ing accidentally separated from the drill spindle.
Open the keyed chuck (1) fully and unscrew the securing
screw (10) clockwise. Note that the securing screw has a
left-hand thread.
When the securing screw (10) is securely seated, place a
screwdriver on the screw head and undo the securing screw
by hitting the handle of the screwdriver.
Removing the drill chuck (see figure E)
To remove the keyed chuck, clamp a hex key (11) into the
keyed chuck (1).
Place the power tool on a firm surface, e.g. a work bench.
Hold the power tool firmly and loosen the keyed chuck (1)
by turning the hex key (11) in anticlockwise direction.
A tightly seated keyed chuck is loosened by applying a light
blow onto the long end of the hex key (11). Remove the hex
key from the keyed chuck and fully unscrew the keyed
chuck.
Assembling the drill chuck (see figure F)
The keyed chuck is fitted in reverse order.
The drill chuck must be tightened using a tight-
ening torque of approx. 10-15 Nm.
Screw the securing screw (10) anticlockwise into the open
keyed chuck. Always use a new securing screw because a se-
curing adhesive substance is applied on its thread and is
rendered ineffective after repeated use.
Dust/Chip Extraction
Dust 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 dust can cause allergic
reactions and/or lead to respiratory infections of the user or
bystanders.
Certain dust, such as oak or beech dust, is considered carci-
nogenic, especially in connection with wood-treatment ad-
ditives (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 ma-
terials to be worked.
Avoid dust accumulation at the workplace. Dust can
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easily ignite.
Operation
Starting Operation
Pay attention to the mains voltage. The voltage of the
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power source must match the voltage specified on the
Bosch Power Tools
rating plate of the power tool. Power tools marked
with 230 V can also be operated with 220 V.
Products that are only sold in AUS and NZ: Use a resid-
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ual current device (RCD) with a nominal residual current
of 30 mA or less.
Setting the Rotational Direction
The rotational direction switch (2) is used to change the ro-
tational direction of the power tool. However, this is not pos-
sible while the on/off switch (3) is being pressed.
Right rotation: To drill and to drive in screws, press the ro-
tational direction switch (2) through to the left stop.
Left Rotation: To loosen and unscrew screws and nuts,
press the rotational direction switch (2) through to the right
stop.
Switching on/off
To start the power tool, press and hold the on/off switch
(3).
Press the lock-on button (4) to lock the on/off switch (3) in
this position.
To switch off the power tool, release the on/off switch (3);
or, if the switch is locked with the lock-on button (4), briefly
press the on/off switch (3) and then release it.
Adjusting the Speed
You can adjust the speed of the power tool when it is on by
pressing in the on/off switch (3) to varying extents.
A light pressure on the on/off switch (3) results in a low rota-
tional speed. Increased pressure on the switch causes an in-
crease in speed.
Practical advice
Pull the plug out of the socket before carrying out any
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work on the power tool.
Only apply the power tool to the screw/nut when the
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tool is switched off. Rotating tool inserts can slip off.
When drilling into metal, only use sharpened HSS drills (HSS
= high-speed steel) which are in perfect condition. The
Bosch accessory range guarantees appropriate quality.
Using the drill bit sharpener (accessory), you can effortlessly
sharpen twist drill bits with a diameter of 2.5–10 mm.
The machine vice, which is available as an accessory, en-
ables the workpiece to be securely clamped. This prevents
the workpiece from turning and any accidents this could
cause.
Maintenance and Service
Maintenance and Cleaning
Pull the plug out of the socket before carrying out any
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work on the power tool.
To ensure safe and efficient operation, always keep
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the power tool and the ventilation slots clean.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by an
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1 609 92A 7Y1 | (15.06.2022)