Bosch GWS 20-230 H - Инструкция по эксплуатации - Страница 19

20

 | English 

1 609 92A 2C7 | (13.10.16)

Bosch Power Tools

Grinding Cup



When working with the grinding cup, mount the special 
protection guard 15.

The grinding cup 

16

 should never project further out of the 

protection guard 

15

 than necessary for the respective grind-

ing application. Adjust the protection guard 

15

 accordingly to 

this dimension.

See graphics page for the mounting sequence.

Screw on clamping nut 

9

 and tighten with two-pin spanner 

17

.

Quick-clamping Nut

For convenient changing of grinding tools without the use of 
additional tools, you can use the quick-clamping nut 

11

 in-

stead of the clamping nut 

9

.



The quick-clamping nut 11 may be used only for grind-
ing or cutting discs.

Use only a flawless, undamaged quick-clamping nut 11.
When screwing on, pay attention that the side of the 
quick-clamping nut 11 with printing does not face the 
grinding disc; the arrow must point to the index mark 27.

Lock the grinder spindle with 
the spindle lock button 

1

. To 

tighten the quick-clamping 
nut, firmly turn the grinding 
disc in clockwise direction.

A properly attached, undam-
aged quick-clamping nut can 
be loosened by hand when 
turning the knurled ring in an-
ticlockwise direction.

Never loosen a tight quick-
clamping nut with pliers. Al-
ways use the two-pin span-
ner.

 Insert the two-pin span-

ner as shown in the 
illustration.

Approved Grinding Tools

All grinding tools mentioned in these operating instructions 
can be used.

The permissible speed [min

-1

] or the circumferential speed 

[m/s] of the grinding tools used must at least match the values 
given in the table.

Therefore, observe the permissible 

rotational/circumferen-

tial speed

 on the label of the grinding tool.

Rotating the Machine Head



Before any work on the machine itself, pull the mains 
plug.

The machine head can be 
rotated with respect to 
the machine housing in 
90 ° steps. In this manner, 
the On/Off switch can be 
brought into a more con-
venient position for spe-
cial working situations, 
e. g., for cutting opera-
tions using the cutting 
guide with dust extrac-

tion protection guard 

24

 or for left-handed persons.

Completely unscrew the four screws. Rotate the machine 
head carefully, 

without removing it from the housing,

 to the 

new position. Screw in and tighten the four screws again.

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 car-
cinogenic, especially in connection with wood-treatment 
additives (chromate, wood preservative). Materials con-
taining asbestos may only be worked by specialists.
– As far as possible, use a dust extraction system suitable 

for the material.

– 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 
materials to be worked.



Prevent dust accumulation at the workplace. 

Dust can 

easily ignite.

27

max.

[mm]

[mm]

D

b

d

[min

-1

]

[m/s]

180
230

8
8

22.2
22.2

8 500
6 600

80
80

180
230

–

–

8 500
6 600

80
80

100

30

M 14

8 600

45

D

D

b

d

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