Maintenance
171
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16.5
Tightening Torques (Countersunk Screws)
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The tightening torque M
A
is stated in Nm
(unless otherwise indicated).
A = Thread size
(The stability class can be seen on the head of the
screw.)
A
Ø
5.6 8.8 10.9
12.9
M
A
(Nm)
M 4
2.5 3.5 4.1
M 5
4.7 7 8
M 6
8 12
15
M 8
20 29 35
M 10
23 39 58 67
M 12
34 68 100 116
M 14
108
160
188
M 16
168
248
292
M 20
340
488
568
A
BM 400 0234
NOTE
The table above applies only to countersunk screws with hexagonal socket heads and metric
threading that are tightened by the hexagonal socket head.
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16.5.1 Deviating
Torque
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Screws / nuts
MA [Nm]
Nut for cutting disc flange
850
Nut for shear protection (rotary hub)
300
Bearing housing for cutting disc
50
Bearing housing for blade drum
50
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