Technical training
Basic Technical Training Standard / V9 2024-06-24
6. Lubrication of Bolts
Lubrication is used to achieve the correct amount of friction and as such the applied lubrication must cover the entire friction surface in an even layer.
The different bolt types must be lubricated in the following way: Bolt type Lubricant
Bolt A
Bolt B
Bolt C
Training provider: fill in the lubrication instructions for the bolts being used in training.
Safety Note: Correct PPE, specified in the SDS must be donned when working with lubricants
7. Bolt torque values Training provider: you should modify the table below to match bolts used in training. GWO recommends using tension values at 50% of bolt yield strength for safety purposes.
Bolt Type
Hot Dip Galvanized
Stainless and bolt tightened into aluminium
Property Class
8.8
10.9
All Property Classes
Torque Force
Size ↓
Nm
Nm
Nm
M8
21
30
14
M10
42
60
29
M12
75
100
52
M16
175
250
125
M20
350
450
250
M24
600
800
425
M30
1150
1650
800
M33
1550
2200
-
M36
2000
2800
-
M42
3200
4500
-
M48
4700
6500
-
Global Wind Organisation / www.globalwindsafety.org
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