Bosch Professional GBM 10 RE Original Instructions Manual page 12

12 | English
Vibration total values a (triax vector sum) and uncertainty K
h
determined according to EN 62841-2-1:
2
Drilling in metal: a = 4.5 m/s , K = 1.5 m/s
h
The vibration level and noise emission value given in these
instructions have been measured in accordance with a
standardised measuring procedure and may be used to com-
pare power tools. They may also be used for a preliminary
estimation of vibration and noise emissions.
The stated vibration level and noise emission value repres-
ent the main applications of the power tool. However, if the
power tool is used for other applications, with different ap-
plication tools or is poorly maintained, the vibration level
and noise emission value may differ. This may significantly
increase the vibration and noise emissions over the total
working period.
To estimate vibration and noise emissions accurately, the
times when the tool is switched off or when it is running but
not actually being used should also be taken into account.
This may significantly reduce vibration and noise emissions
over the total working period.
Implement additional safety measures to protect the oper-
ator from the effects of vibration, such as servicing the
power tool and application tools, keeping their hands warm,
and organising workflows correctly.
Assembly
Pull the plug out of the socket before carrying out any
u
work on the power tool.
Changing the tool
Wear protective gloves when changing tools. The drill
u
chuck may heat up significantly when it is used for long
periods.
Keyless chuck (see figure A)
Hold the rear sleeve (3) of the keyless chuck (1) firmly and
turn the front sleeve (2) in rotational direction ➊ until the
tool can be inserted. Insert the tool.
Hold the rear sleeve (3) of the keyless chuck (1) and firmly
tighten the front sleeve (2) by hand in rotational direction ➋
until you hear a click. This will automatically lock the drill
chuck.
The lock will disengage again if you turn the front sleeve (2)
in the opposite direction to remove the tool.
Screwdriving tools (see figure B)
You should always use a universal bit holder (10) when using
screwdriver bits (9). Only use screwdriver bits that fit the
screw head.
Changing the drill chuck
If your power tool does not have a drill spindle locking
u
mechanism, you must have the drill chuck changed by an
authorised after-sales service centre for Bosch power
tools.
1 609 92A 7YC | (04.07.2022)
2
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
u
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
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-
u
ual current device (RCD) with a nominal residual current
of 30 mA or less.
Setting the rotational direction (see figure C)
The rotational direction switch (7) is used to change the ro-
tational direction of the power tool. However, this is not pos-
sible while the on/off switch (6) is being pressed.
Right rotation: To drill and to drive in screws, press the ro-
tational direction switch (7) through to the left stop.
Left Rotation: To loosen and unscrew screws and nuts,
press the rotational direction switch (7) through to the right
stop.
Switching on/off
To start the power tool, press and hold the on/off switch
(6).
Press the lock-on button (5) to lock the on/off switch (6) in
this position.
To switch off the power tool, release the on/off switch (6);
or, if the switch is locked with the lock-on button (5), briefly
press the on/off switch (6) 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 (6) to varying extents.
A light pressure on the on/off switch (6) results in a low rota-
tional speed. Increased pressure on the switch causes an in-
crease in speed.
The drill chuck must be tightened using a tight-
ening torque of approx. 31–35 Nm.
Bosch Power Tools