Dust/Chip Extraction; Starting Operation; Practical Advice - Bosch GRO 12V-35 Professional Notice Originale

Note: Ensure that the shank (18) of the application tool sits
in as far as possible, but at least 10 mm into the collet.
– Press and hold the spindle lock (5) and tighten the applic-
ation tool by turning the clamping nut (12) clockwise with
the open-ended spanner (17).
Removing the application tool
– Loosen the clamping nut (12) as previously described
and remove the application tool.
Fitting the Cutting Disc (see figure C)
Cutting discs reinforced with fibreglass are included in the
scope of delivery. They can be used for grooving, routing and
cutting metal, wood and plastic.
– Insert the holding rod (2) into the tool holder (see "Insert-
ing the Application Tool (see figure B)", page 18).
– Press and hold the spindle lock (5) and completely un-
screw the screw on the holding rod (2) using the screw-
driver (17).
– Attach the cutting disc (1) to the holding rod (2) and rein-
sert and tighten the screw.
Changing the Collet (see figure D)
– Press the spindle lock (5) and turn the clamping nut (12)
by hand until locked.
– Press and hold the spindle lock and loosen the clamping
nut (12) with the open-ended spanner (17) by turning it
anticlockwise.
– Remove the clamping nut (12) together with the collet
(19).
– Insert the required collet into the drive spindle (20).
– Screw the clamping nut (12) onto the drive spindle (20)
and tighten it slightly by turning it clockwise with the
open-ended spanner (17).
Changing the Dust Protection Cap (see figure E)
Two dust protection caps are included in the scope of deliv-
ery.
Use the dust protection cap (11) when you need a good grip
for detailed work.
Use the dust protection cap (21) when you have to work
close to the workpiece surface.
The dust protection cap largely prevents the penetration of
dust into the tool holder during operation. When inserting
the tool, make sure that the dust protection cap does not be-
come damaged.
– Unscrew the dust protection cap used.
– Screw on the new dust protection cap and tighten it.

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-
Bosch Power Tools
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

Inserting the Battery
Insert the charged battery (9) into the battery holder until it
is flush and you feel it engage.
Switching On and Off
To start the power tool, slide the on/off switch (6) forwards.
To switch off the power tool, push the on/off switch (6) to-
wards the rear.
Adjusting the Speed
The speed regulator (7) enables continuously variable ad-
justment of the speed of the power tool even during opera-
tion.
Speed setting
1
2
3
4
5
6
– When working with plastics and other materials with a low
melting point, use low speeds.
– Perform cutting work in wood, iron or steel at high
speeds.
– When polishing, buffing and cleaning, work with speeds
-1
of up to max. 15,000 min in order to avoid damaging the
workpiece and application tool.

Practical advice

Detailed work can be carried out best if you hold the power
tool as a pen between the thumb and index finger (see fig-
ure F).
For heavy work such as cutting or grinding, use the "golf grip
method" (see figure G).
Move the cutting disc or grinding accessory with light pres-
sure to achieve an optimum work result. Too much pressure
will reduce the performance of the power tool and lead to
faster wear of the application tool.
Ensure that grinding tools and cutting discs are pro-
u
tected against impact when stored.
English | 19
Speed adjustment range
-1
5000–8000 min
-1
9000–12,000 min
-1
16,000–19,000 min
-1
20,000–24,000 min
-1
24,000–28,000 min
-1
30,000–35,000 min
1 609 92A 54U | (26.07.2019)