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OBJ_BUCH-832-004.book Page 17 Wednesday, December 12, 2012 10:31 AM
– Type of backing (washer, disc spring, seal)
– Strength properties of the material being screwed/bolted
together
– Lubrication conditions at the screw/bolt connection
The following application cases result accordingly:
– A hard seat is given for metal-to-metal screw applications
with the use of washers. After a relatively short impact du-
ration, the maximum torque is reached (steep characteris-
tic curve). Unnecessary long impact duration only causes
damage to the machine.
Reference Values for Maximum Screw/Bolt Tightening Torques
Calculated from the tensional cross-section; utilization of the yield point 90 % (with friction coefficient μ
measure, always check the tightening torque with a torque wrench.
Property Classes accord-
Standard Screws/Bolts
ing to DIN 267
3.6
M 6
2.71
M 8
6.57
M 10
M 12
22.6
M 14
M 16
Tips
Before screwing larger, longer screws into hard materials, it is
advisable to predrill a pilot hole with the core diameter of the
2
thread to approx.
/
of the screw length.
3
Note: Pay attention that no metal particles enter the power
tool.
Belt Clip
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.
Recommendations for Optimal Handling of the Battery
Protect the battery against moisture and water.
Store the battery only within a temperature range between
0 °C and 50 °C. As an example, do not leave the battery in the
car in summer.
Occasionally clean the venting slots of the battery using a soft,
clean and dry brush.
A significantly reduced working period after charging indi-
cates that the battery is used and must be replaced.
Observe the notes for disposal.
Maintenance and Service
Maintenance and Cleaning
Before any work on the machine itself (e. g. mainte-
nance, tool change, etc.) as well as during transport
and storage, remove the battery from the power tool.
There is danger of injury when unintentionally actuating
the On/Off switch.
Bosch Power Tools
– A spring-loaded seat is given for metal-to-metal screw ap-
– A soft seat is given for screw applications, e. g., metal on
For a spring-loaded seat as well as for a soft seat, the maxi-
mum tightening torque is lower than for a hard seat. Also, a
clearly longer impact duration is required.
4.6
5.6
4.8
3.61
4.52
4.8
8.7
11
11.6
13
17.5
22
23
30
37.6
40
36
48
60
65
55
73
92
98
For safe and proper working, always keep the machine
Replacing the Carbon Brushes (see figure E)
Check the length of the carbon brushes approx. every
2 –3 months and replace the carbon brushes if required.
Never replace only a single carbon brush!
Note: Use only carbon brushes supplied by Bosch and intend-
ed specifically for your product.
– Unscrew the caps 16 using a suitable screwdriver.
– Replace the spring-loaded carbon brushes 15 and screw
If the machine should fail despite the care taken in manufac-
turing and testing procedures, repair should be carried out by
an after-sales service centre for Bosch power tools.
In all correspondence and spare parts order, please always in-
clude the 10-digit article number given on the type plate of
the machine.
After-sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
Bosch's application service team will gladly answer questions
concerning our products and their accessories.
plications, however with the use of spring washers, disc
springs, studs or screws/nuts with conical seat as well as
when using extensions.
wood or when using lead washers or fibre washers as back-
ing.
6.6
5.8
6.8
6.9
5.42
6.02
7.22
8.13
13.1
14.6
17.5
19.7
26
29
35
39
45
50
60
67
72
79
95
107
110
122
147
165
and ventilation slots clean.
the caps back on again.
English | 17
= 0.12). As a control
total
High-strength Bolts
8.8
10.9
12.9
9.7
13.6
16.2
23
33
39
47
65
78
80
113
135
130
180
215
196
275
330
1 609 92A 00R | (12.12.12)