Bosch GDS Professional Service Manual download pdf (Page 9)

English | 17

Bosch Power Tools 1 609 929 M70 | (26.10.07)

Reference Values for Maximum Screw/Bolt Tightening Torques

Calculated from the tensional cross-section; utilization of the yield point 90 % (with friction coefficient

total

= 0.12). As a control measure, always check the tightening torque with a torque wrench.

Tips

Torque rods have shanks with precisely calibrat-

ed, reduced diameters. Thus, they act torque-lim-

iting. A torque rod is placed between the impact

wrench and the bit.

Rule of thumb for the application: Core diameter

of the screw/bolt = effective diameter of the

torque rod. The impact duration is to be deter-

mined through practical testing.

The thumbwheel 2 must be set to max.

For hanging up, a suspension hook 1 is mounted

at the machine's centre of gravity.

At temperatures below the freezing point, run

the machine for approx. 3 minutes at no-load to

improve its lubricating capacity.

Maintenance and Service

Maintenance and Cleaning

f Before any work on the machine itself, pull

the mains plug.

f For safe and proper working, always keep

the machine and ventilation slots clean.

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.

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-544-001.book Page 17 Friday, October 26, 2007 1:35 PM

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