Maintenance And Service; Maintenance And Cleaning - Bosch Professional GDS 24 Manual Original

OBJ_BUCH-548-001.book Page 18 Wednesday, October 24, 2007 10:10 AM
18 | English
Reference Values for Maximum Screw/Bolt Tightening Torques
Calculated from the tensional cross-section; utilization of the yield point 90 % (with friction coefficient
μ
= 0.12). As a control measure, always check the tightening torque with a torque wrench.
total
Property Classes
according to DIN 267
M 8
M 10
M 12
M 14
M 16
M 18
M 20
M 22
M 24
M 27
M 30
Examples for Determining the Impact Duration
(GDS 30)
Screw/bolt size M 24 of property class 8.8 =
Screw/bolt tightening torque 650 Nm
For 650 Nm, the GDS 30 diagram reveals an im-
pact duration of 0.8 seconds. (Diagram for GDS
30 see page 17)
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.
For hanging up, a suspension hook 1 is mounted
at the machine's centre of gravity.
The position of the handle can be changed with
an angle piece (accessory).
At temperatures below the freezing point, run
the machine for approx. 3 minutes at no-load to
improve its lubricating capacity.
1 609 929 M73 | (24.10.07)
Standard Screws/Bolts
3.6 4.6 5.6 4.8
6.57 8.7 11 11.6
13 17.5 22 23
22.6 30 37.6 40
36 48 60 65
55 73 92 98
75 101 126 135
107 143 178 190
145 190 240 255
185 245 310 325
275 365 455 480
370 495 615 650
6.6 5.8 6.8 6.9
13.1 14.6 17.5 19.7
26 29 35 39
45 50 60 67
72 79 95 107
110 122 147 165
151 168 202 227
214 238 286 320
290 320 385 430
370 410 490 455
445 605 725 815
740 820 990 1110 1300 1830 2200

Maintenance and Service

Maintenance and Cleaning

Before any work on the machine itself, pull
the mains plug.
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.
High-strength
Bolts
8.8 10.9 12.9
23 33 39
47 65 78
80 113 135
130 180 215
196 275 330
270 380 450
385 540 635
510 715 855
650 910 1100
960 1345 1615
Bosch Power Tools