Can our shut-off wrenches (AccuTec) also be used for left-hand threaded connections?
Question:
Can our shut-off screwdrivers (AccuTec, ASM, ASW) also be used for left-hand threaded connections?
Answer:
AccuTec mechanical shut-off screwdrivers are designed for tightening right-hand threads (geometry coupling) and shut off with a repeat accuracy of +/- 5%.
Anything that is screwed tight can also be opened again with the reverse rotation (loosening torque higher than the tightening torque).
Mechanical shut-off is possible in reverse, but not with an accuracy of +/- 5% (the dispersion is higher – there is also no homologation test for this), and screw connections that have been made in reverse cannot be opened again with clockwise rotation.
We do not recommend FEIN AccuTec for continuous use for screw connections in reverse.
One option for left-hand screw connections (continuous use) is EC screwdrivers (different technology, not comparable with mechanical shut-off screwdrivers). These are programmable and can precisely control and monitor torque, speed, and angle of rotation. There are several suppliers on the market offering this technology.
If you are interested in testing FEIN AccuTec, please do not hesitate to contact us.