English |
21
Bosch Power Tools
2 609 140 699 | (3.12.09)
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.
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.
When the battery is no longer operative, please
refer to an authorised after-sales service agent
for Bosch power tools.
If the machine should fail despite the care taken
in manufacturing 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 include the 10-digit article
number given on the type plate of the machine.
After-sales Service and Customer
Assistance
Our after-sales service responds to your ques-
tions concerning maintenance and repair of your
product as well as spare parts. Exploded views
and information on spare parts can also be
found under:
www.bosch-pt.com
Our customer service representatives can an-
swer your questions concerning possible appli-
cations and adjustment of products and acces-
sories.
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
Denham
Uxbridge
UB 9 5HJ
Tel. Service: +44 (0844) 736 0109
Fax: +44 (0844) 736 0146
E-Mail: [email protected]
Ireland
Origo Ltd.
Unit 23 Magna Drive
Magna Business Park
City West
Dublin 24
Tel. Service: +353 (01) 4 66 67 00
Fax: +353 (01) 4 66 68 88
Property Classes ac-
cording 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
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