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22 | English
1 609 929 T14 | (18.11.09) Bosch Power Tools
Reference Values for Maximum Screw/Bolt Tightening Torques
Calculated from the tensional cross-section; utilization of the yield point 90% (with friction coeffi-
cient μ
total
= 0.12). As a control measure, always check the tightening torque with a torque wrench.
Tips
Before screwing larger, longer screws into hard
materials, it is advisable to predrill a pilot hole
with the core diameter of the thread to approx.
2
/
3
of the screw length.
Belt Clip (see figure D)
With the belt clip 4, the machine can be hung
onto a belt. The user has both hands free and
the machine is always at hand.
The belt clip 4 can be attached and screwed to
either side of the machine.
The belt clip 4 will automatically draw out when
pressing both release buttons. To dismount the
belt clip 4, remove the complete unit by un-
screwing the fastening screw.
Always tighten the fastening screw after mount-
ing the belt clip 4.
Maintenance and Service
Maintenance and Cleaning
f Before any work on the machine (e. g.,
maintenance, tool change, etc.) as well as
during transport and storage, set the rota-
tional direction switch to the centre posi-
tion. Unintentional actuation of the On/Off
switch can lead to injuries.
f For safe and proper working, always keep
the machine and ventilation slots clean.
Replacing the Carbon Brushes (see figure E)
Check the length of the carbon brushes approx.
every 23 months and replace the carbon
brushes if required.
Never replace only a single carbon brush!
Criteria for replacement of the carbon brushes:
A dotted or broken line is visible on one of the
large side surfaces of each carbon brush. When
either of both carbon brushes is used up to this
line, then both carbon brushes should be re-
placed immediately in order to protect the ar-
mature against possible damage.
Note: Use only carbon brushes supplied by
Bosch and intended specifically for your prod-
uct.
Property Classes
according to
DIN 267
Standard Screws/Bolts High-strength
Bolts
3.6 4.6 5.6 4.8 6.6 5.8 6.8 6.9 8.8 10.9 12.9
M 6
2.71 3.61 4.52 4.8 5.42 6.02 7.22 8.13 9.7 13.6 16.2
M 8
6.57 8.7 11 11.6 13.1 14.6 17.5 19.7 23 33 39
M 10
13 17.5 22 23 26 29 35 39 47 65 78
M 12
22.6 30 37.6 40 45 50 60 67 80 113 135
M 14
36 48 60 65 72 79 95 107 130 180 215
M 16
55 73 92 98 110 122 147 165 196 275 330
M 18
75 101 126 135 151 168 202 227 270 380 450
M 20
107 143 178 190 214 238 286 320 385 540 635
OBJ_BUCH-595-002.book Page 22 Wednesday, November 18, 2009 5:13 PM
22


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