"MEG" wrote: (clip) I welded some new teeth in a bevel gear on a drill press with
^^^^^^^^^^^^^^^^^^ When I was servicing Multilith offset presses, a customer stripped a few teeth out of a spur gear. A new gear could not be had for a few days, and to get the machine running again "temporarily," I built up some new teeth with brazing rod, using an oxy-acetylene torch. Like you, I used a file to shape the teeth. I did this by rolling the gear against a good gear, and removing metal until the gears meshed without feeling "lumpy." When the new gear came in, the "temporary" was still working fine, so we did not bother to change it out. Several years later, as far as I know, the printer still has the new gear on the shelf as a spare. In fairness, I have to admit that this was not transmitting much power.