Originally Posted by martini
Is there a difference between a shear wrench and an impact wrench? Makes me wonder if they're specially designed for doing up shear bolts in structural steelwork. The yanks use them more than us, they have a kind of secondary bolt head which is designed to shear off when it's done up to the correct torque.
Yeah, it uses a specialist bolt with a spline on the thread end. As you say, this holds the bolt captive and it's then sheared off when sufficient torque has been applied. Clever stuff eh?
Anchor is also correct, in that it can be used as a hardcore torque driver. It turns at 15rpm, there's a lot of reduction going on in there. Mind you, it ought to have fancy guts for £2k a pop.