Torque Guidelines
Note that the torque guidelines below only apply to HV bolts with NLSC washers.
|
Washer
|
Reduced preload force |
Modified |
|
Modified combined |
Securing [Nm] |
| NL12SC | 45 | 130 | 100 | 80 | |
| NL16SC | 90 | 330 | 250 | 200 | |
| NL20SC | 145 | 660 | 490 | 360 | |
| NL22SC | 170 | 850 | 640 | 520 | |
| NL24SC | 200 | 1100 | 825 | 640 | |
| NL27SC | 260 | 1600 | 1220 | 1000 | |
| NL30SC | 315 | 2150 | 1650 | 1320 | |
| NL36SC | 460 | 3750 | 2800 | 2240 | |
*Tightening conditions are specified in ETA-13/0246 for HV bolts, grade 10.9.
Required angle of further rotation
| Clamp length | angle | part tum |
| t < 2d | 45° | 1/8 |
| 2d ≤ t < 6d | 60° | 1/6 |
| 6d ≤ t ≤ 10d | 90° | 1/4 |
| 10d < t | No recommendations | |
| Tightening angles when using the combined method varies depending on the clamp length, (t), in relation to bolt diameter, (d). | ||