Bosch GWS 24-300 J - Инструкция по эксплуатации - Страница 17

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17

Bosch Power Tools

1 609 92A 0J8 | (4.7.14)



Adjust the protection guard 5 in such a manner that 
sparking is prevented in the direction of the operator.

The tensioning force of the clamping lever is preset for tight 
seating of the protection guard 

6

. By tightening the adjust-

ment screw 

7

, the tensioning force can be increased. Pay at-

tention to the tight seating of the protection guard 

6

 and 

check it regularly.

Note:

 The encoding keys on the protection guard 

5

 ensure 

that only a protection guard that fits the machine type can be 
mounted.

Bow Handle

Fasten the bow handle 

1

 to the gear case as shown in the figure.

Cutting Guide

The cutting guide 

15

 prevents the application tool and the 

workpiece from jamming.

Loosen the wing nuts on the cutting guide 

15

. Press both wing 

nuts and at the same time insert the screw heads into the slots 
on the bottom side of the protection guard 

6

. Adjust the re-

quested cutting depth and tighten the wing nuts.

Mounting the Grinding Tools



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



Do not touch grinding and cutting discs before they 
have cooled down. 

The discs can become very hot while 

working.



Use only diamond-tipped cutting discs. Segmented dia-
mond wheels may only have negative cutting angles 
and slots between the segments to a maximum of 
10 mm.

Note: 

Use only grinding tools with an outer diameter of maxi-

mum 300 mm. For cutting stone or metal, only use the grind-
ing tools recommended by Bosch.

Clean the grinder spindle 

5

 and all parts to be mounted.

For clamping and loosening the grinding tools, lock the grind-
er spindle with the spindle lock button 

3

.



Actuate the spindle lock button only when the grinder 
spindle is at a standstill. 

Otherwise, the machine may be-

come damaged.

Pay attention to the dimensions of the grinding tools. The 
mounting hole diameter must fit the mounting flange without 
play. Do not use reducers or adapters.

When using diamond cutting discs, pay attention that the di-
rection-of-rotation arrow on the diamond cutting disc and the 
direction of rotation of the machine (see direction-of-rotation 
arrow on the machine head) agree.

See graphics page for the mounting sequence.

To fasten the grinding/cutting disc, screw on the clamping nut 

13

 and tighten with the two-pin spanner; see Section “Quick-

clamping Nut ”.



After mounting the grinding tool and before switching 
on, check that the grinding tool is correctly mounted 
and that it can turn freely. Make sure that the grinding 
tool does not graze against the protection guard or oth-
er parts.

Quick-clamping Nut

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

12

 in-

stead of the clamping nut 

13

.



The quick-clamping nut 12 may be used only for grind-
ing or cutting discs.

Use only a flawless, undamaged quick-clamping nut 12.

When screwing on, pay attention that the side of the 
quick-clamping nut 12 with printing does not face the 
grinding disc; the arrow must point to the index mark 21.

Lock the grinder spindle with 
the spindle lock button 

3

. 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.

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 man-
ner, the On/Off switch 
can be brought into a 
more convenient posi-
tion for special working 
situations, e. g., for cut-
ting operations using the 

cutting guide with dust extraction protection guard 

18

 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.

21

OBJ_BUCH-280-005.book  Page 17  Friday, July 4, 2014  10:30 AM