Posted by DBDBrian
on November 12, 2021, 7:37 pm, in reply to "Re: 30Nm.
A 3/4" fine bolt pulled down to 100 FT-LBS is probably getting to the limit of a 1/2" drive nut gun. Is the gun well lubricated, what size and how long is your air hose to the gun, also is the air supply through a regulator which my not have a high flow rate, it ideally need to be supplied direct from the air receiver of the compressor.
I worked quite a bit on Deutz air cooled diesels, their system is to pre load the bolt/nut to a very low torque setting, and then turn it through x degrees x times.
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