English | 9
Bosch Power Tools 1 609 929 M75 | (12.11.07)
Reference Values for Maximum Screw/Bolt Tightening Torques
Calculated from the tensional cross-section; utilization of the yield point 90 % (with friction coefficient
μ
total
= 0.12). As a control measure, always check the tightening torque with a torque wrench.
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 8)
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 center 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.
Maintenance and Service
Maintenance and Cleaning
f Before any work on the power tool itself,
pull the mains plug.
f For safe and proper working, always keep
the power tool and the ventilation slots
clean.
If the power tool should fail despite the care tak-
en in manufacturing and testing procedures, re-
pair should be carried out by an after-sales ser-
vice center for Bosch power tools.
In all correspondence and spare parts orders,
please always include the 10-digit article number
given on the type plate of the power tool.
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 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
M 22
145 190 240 255 290 320 385 430 510 715 855
M 24
185 245 310 325 370 410 490 455 650 910 1100
M 27
275 365 455 480 445 605 725 815 960 1345 1615
M 30
370 495 615 650 740 820 990 1110 1300 1830 2200
OBJ_BUCH-550-001.book Page 9 Monday, November 12, 2007 4:54 PM
To Next Page
Loading...
