Fitting The Abrasive Tools; Selecting The Grinding/Cutting Disc; Dust/Chip Extraction - Bosch GWS 12V-76 Professional Manual Original

20 | English
Protective guard for cutting
When cutting, always use the protective guard for
u
cutting (10).
Provide sufficient dust extraction when cutting stone.
u
Fitting the Protective Guard (see figure A)
Insert the protective guard for cutting (10) onto the protect-
ive guard for grinding (7) until this engages firmly.
Adjusting the Protective Guard (see figure A)
Turn the protective guard to the required position and en-
sure the protective guard is engaged. No tool is required for
this.
Adjust the protective guard (7) such that sparking in
u
the direction of the operator is prevented.

Fitting the abrasive tools

Remove the battery from the power tool before carry-
u
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be re-
moved for transport and storage. There is risk of injury
from unintentionally pressing the on/off switch.
Do not touch grinding and cutting discs until they have
u
cooled down. The discs can become very hot while work-
ing.
Clean the grinding spindle (8) and all parts to be mounted.
To tighten or loosen the abrasive tools, push the spindle lock
button (2) forwards and simultaneously turn the grinding
tool to fix the grinding spindle in place.
Do not press the spindle lock button while the grind-
u
ing spindle is moving. The power tool may become dam-
aged if you do this.
Grinding/cutting disc
Pay attention to the dimensions of the abrasive tools. The
diameter of the hole must match that of the mounting flange.
Do not use an adapter or reducer.
When using diamond cutting discs, make sure that the direc-
tion of rotation arrow on the diamond cutting disc corres-
ponds to the direction of rotation of the machine (see direc-
tion of rotation arrow on the housing). See the graphics page for fitting instructions.
Note: When assembling bonded grinding or cutting discs us-
ing the supplied clamping bolt with washer (11), the use of
intermediate layers is not necessary.
To remove the grinding/cutting disc, push the spindle lock
button (2) forwards while simultaneously turning on the
grinding/cutting disc (12) in order to fix the grinding
spindle (8) in place (see figure B1).
Use a hex key (13) to remove the clamping bolt with
washer (11) and take off the grinding/cutting disc (12)
(see figure B2).
To attach the grinding/cutting disc, screw in the clamping
bolt with washer (11). Tighten the bolt using the hex
key (13) until the washer of the bolt is flush with the grind-
ing/cutting disc (12) (see figure B3).
1 609 92A 5RF | (28.07.2023)
Then push the spindle lock button (2) back again
(see figure B4).
After fitting the abrasive tool, check that the abrasive
u
tool is fitted correctly and can turn freely before
switching on the power tool. Make sure that the abras-
ive tool does not brush against the protective guard or
other parts.
Approved Grinding Tools
You can use all the abrasive tools mentioned in these operat-
ing instructions.
-1
The permissible speed [min ] or the circumferential speed
[m/s] of the abrasive tools used must at least match the val-
ues given in the table.
It is therefore important to observe the permissible rota-
tional/circumferential speed on the label of the abrasive
tool.
max. [mm] [mm]
D b s
76 6 – 10
76 2 – 10
76 3 10 10
s
α

Selecting the Grinding/Cutting Disc

Abrasive tool
Expert Carbide
Multi Wheel
Expert for Inox
Expert Hard
Ceramic

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.
–1
d α [min ] [m/s]
– 19500 80
– 19500 80
> 0 19500 80
Material
Wood (with nails),
plastic, PVC, com-
posite materials,
acrylic glass,
plaster, copper
Stainless steel,
steel
Tiles, hard porcel-
ain, fine stone-
ware, ceramics
Bosch Power Tools