# CTh - Cross Thread

Tools
ES STR SL ST SR QST STB IXB

This restriction checks the angle from the point where torque passes Start torque (T1) to the point where the torque passes End torque (T2). If the angle measured from Start torque (T1) is higher than Maximum limit (Amax), the tool is stopped immediately.

When the torque passes End torque (T2), the measured angle is checked against the limit Minimum limit (Amin). If the angle is lower than this limit, the tool is stopped immediately.

Parameter | Description | In illustration
--- | --- | ---
Start Torque | Must be <=0. | T1
End Torque | Must be <=0. | T2
Minimum Limit | The low angle limit. | Amin
Maximum Limit | The high angle limit. | Amax