Bosch Professional GBM 400 Original Instructions Manual page 7

Drill
No-load speed
Rated speed
Speed control
Clockwise/anticlockwise
rotation
Keyed chuck
Keyless chuck
Chuck capacity
– Keyed chuck
– Keyless chuck
Max. drilling diameter
– Steel
– Wood
– Aluminium
Weight according to
EPTA-Procedure 01:2014
Protection class
The specifications apply to a rated voltage [U] of 230 V. These spe-
cifications may vary at different voltages and in country-specific mod-
els.
Noise/vibration information
Noise emission values determined according to
EN 62841-2-1.
Typically, the A-weighted noise level of the power tool is:
Sound pressure level 88 dB(A); sound power level
96 dB(A). Uncertainty K = 5 dB.
Wear hearing protection!
Vibration total values a (triax vector sum) and uncertainty K
h
determined according to EN 62841-2-1:
2
Drilling in metal: a = 5.0 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
Bosch Power Tools
power tool and application tools, keeping their hands warm,
GBM 400
and organising workflows correctly.
-1
min 0–2800
-1
min 0–1800
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.
mm 1–10
Keyed Chuck (see figure A)
mm 0,8–10
Open the keyed chuck (1) by turning it until the tool can be
inserted.
mm 10
Insert the tool.
mm 20
Insert the drill chuck key (6) into the corresponding holes of
mm 13
the keyed chuck (1) and clamp the tool evenly.
kg 1.3
Keyless Chuck (see figure C)
Hold the rear sleeve (11) of the keyless chuck (9) firmly and
/ II
turn the front sleeve (10) in the rotational direction ➊ until
the tool can be inserted. Insert the tool.
Hold the rear sleeve (11) of the keyless chuck (9) tight and
firmly turn the front sleeve (10) in rotational direction ➋ by
hand.
The drill chuck will disengage again if you turn the front
sleeve (10) in the opposite direction to remove the tool.
Screwdriving Tools (see figures B and D)
You should always use a universal bit holder (8) when using
screwdriver bits (7). Only use screwdriver bits that fit the
screw head.
Changing the drill chuck
2
If your power tool does not have a drill spindle locking mech-
anism, you must have the drill chuck changed by an author-
ised after-sales service centre for Bosch power tools.
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.
The drill chuck must be tightened using a tight-
ening torque of approx. 25–30 Nm.
1 609 92A 7YY | (08.09.2022)
English | 7