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impact wrench operation

Posted by Dave Jones on August 14th, 1998 11:48 AM

0 of 2 people found this post helpful

I'd like to get some guidelines on using an impact wrench
before I snap a few nuts and bolts. My first task is dealing with
a nut > 1" that needs 250 ft/lbs. I feel safe here.
However, how does this compare against using it on a
1/2" or 13/16" nut?

The wrench I just bought says it is capable of
25-400 ft/lbs of torque. The controls are simple. One
reverse speed. I assume operates at 400 ft/lbs. Three
generic forward speeds: 1, 2, 3. The instructs don't
give any approximate torque settings for these three
speeds. The instructions on the impact wrench I bought
say to tighen the nut down. Use the wrench on the
lowest of the 3 settings. Then, increase the settings
as the nut continues to turn.

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