I recently (read: nearly two years ago
) got given a "clicky" torque wrench which had seen slightly better days. I've spent a little time on it today, got the ratchet working properly, and now it clicks when a small amount of force is applied with the scale at one end and when a lot of force is applied with the scale at the other end. The problem is that the screw that secures the scale to the slidey bit (are you following this?), and I think you would use to callibrate it, was loose, so I've got no real idea at all where it should be. Has anyone any experience of callibrating one of these, and a got a fairly easy and simple method? I've had a quick look on Google and seen all sorts of suggestions
but so far the most sensible (apart from the obvious of paying someone else) way seems to be to clamp the square in a vice, use a weight, a pulley and some string, and calculate the moment by measuring how far away from the centre of the ratchet you have the string. Any other suggestions?
