1. LTP61HR1900-38
2. Operation
3. Operating Instructions
4. Tightening torque

Tightening torque

For accurate operation and safety, the tightening torque of the nut runner must be set correctly in relation to the screw joint. Check the tightening torque given to the joint in question.

The air pressure is set at as high a level as possible up to max 6.3 bar – with the aid of a compressed air regulator. Installation of an Atlas Copco regulator, type MIDI REG 15, is recommended.

Loosen the set screw and adjust the torque setting by means of the screw. The torque is increased when screwing the screw clock-wise. After adjustment, tighten the screw.

If shut-off is carried out at high speed of revolution, causing a high torque scatter, it is recommended to reduce the air pressure.

Verification of tightening torque

Atlas Copco Torque Analyser, ACTA 3000, plus an appropriately-sized in-line transducer, IRTT together with the available test joints are recommended equipment.