# Rundown Torque Limits

The friction between the screw and joint varies. This can cause the torque needed to run a screw down a thread, before engagement with the joint surface takes place, to vary as well. These effects could be, for example, hole interference, prevailing torque or varying lubrication.

Monitoring the rundown torque is useful when running down a lock nut or screw that has a plastic insert in the threads to help the fastener resist vibration. This will require a higher torque, known as prevailing torque, to overcome the interference.

Rundown torque limits

Parameter name | Description | Default value
--- | --- | ---
Rundown torque limits | Off: Rundown torque limits is turned off. On: Rundown torque limits is turned on. | Off
Offset | Angle offset before the Angle interval begins. | 0°
Length | Angle defining the Rundown torque limit section. | 360°
Torque min | Torque value for lower Rundown torque limit. | 0 Nm
Torque max | Torque value for upper Rundown torque limit. | 4.75 Nm