Atlas Copco 8431017019 Manuale - Pagina 7

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EBL20-RE

Testing of tightening torque

Select testjoint and transducers according to minimum and maximum torque of

your tool

For accurate operation and safety, the tightening torque of the screwdriver must

be adjuisted correctly in relation to the screw joint. Check the torque specifica-

tion for the actual joint.

The tightening torque is adjusted by altering the tension of the clutch spring.

Turn the protection ring until the hole in the clutch housing is free. Then turn

the out going spindle until you can see the keyhole in the adjustment washer.

Turn the adjustment key clockwise to decrease and anticlockwise to increase

the torque. After the adjustment, turn the protective ring back again.

Recommended equipment for verification if tightening torque are an Atlas

Copco Torque Analyser plus an appropriately-sized transducer together with

the available test joints.

Each clutch spring gives a certain torque range. Do not adjust the torque

over the maximum recommendation as that might result in improper func-

tion and faster wear of the clutch.

Operation