Torque control of impact wrench

[Nick55]

Want to use an air impact wrench to torque bolts to an approx torque of 1200N-m (about 900 ft-lb). Is there any proven method available of doing this? Desire to use impact wrench because of speed of operation. Bolts are 1 inch diam.

 

[griffengm]

Zepp,
I misspoke & I apologize. I meant to say that pneumatic impact wrenches are not repeatable. We have pneu. torque wrenches and are happy with them.
When we were developing our requirements we looked at the impulse wrenches but decided that the value vs performance was not good enough.
Nick,
One step we took, and I recommend, is to define a torque range when selecting the wrench rather than a specific torque. It makes a huge difference in the tool selection. If your required range is 800-1000 ft# then a suitable tool may be significantly less money than one needing to meet 875-925.
Hope to hear of your experience.

Griffy