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Thanks to all who have replied. We are buying a non-impact air wrench (Atlas Copco - horribly expensive). It is called a nut runner and appears to have an internal trigger mechanism which shuts it off at a preset torque. Of course it needs a reaction arm. I personally liked the idea of squirt...

I am retrofitting zinc anodes to protect carbon steel subsea. The anodes have a steel piece cast into them. The electrical connection to the structure to be protected is made using copper wire (multistrand insulated, crimp lugs on the ends) from the steel anode insert to the structure. Is copper...

Dear KSTAYLOR, thanks for the tip. This looks like a good tool and I am pursuing it. Strange, since I searched extensively on the web without noticing this company. Unfortunately it requires a reaction arm (one of the advantages of an an impact wrench is the lack of need of a reaction arm)...

Thanks Blacksmith, I will check again. I had only found these in small sizes so far (3/8 drive). I need 3/4 drive or more. Nick

Thanks for your reply, however the whole point of my question was to avoid the need for the devices you are suggesting (torque wrench, etc). The turn of the nut method is, unfortunately, probably not practical because the elastic behaviour of the unit being bolted up is not highly predictable.

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.

As stated earlier, RTV stands for Room Temperature Vulcanising. In practice, compounds called RTV are in general silicone sealants that come in a tube and which set to become a rubbery solid after some time (due to exposure to moisture in the air). There are other methods of turning the...

Greg: I think you applied the "cc to m3" and "Pa to bar" conversions the wrong way round.... Quoting the last part of your argument: "Now substitute for the unit conversions 1m^3 = 10^6 cc, [COLOR=red]so if the input value is in cc it must be divided by...