Few more pics of the headstock stripped down:
WTF? who would paint it pink?
This is the bull gear locking pin (before and after). Originally I thought this would have been a ball and spring detent. So I found a few different size balls and they would either fall out or bind. I couldn't get a spring to stay in either. Then, hidden beneath 100+ years of crud, I found a threaded hole for a setscrew on the rear of the gear. I found a suitable setscrew and shaped the end so it would fit the groove. It worked OK but needed some resistance. I later noticed a v-groove in the bull gear and I found an old leather key ring and cut of a slither with a square cross-section to match the groove. This provides enough resistance and the pin works like a charm now.
Bad picture but if squint just right you can see the v-groove at 6 o'clock
WTF? who would paint it pink?
This is the bull gear locking pin (before and after). Originally I thought this would have been a ball and spring detent. So I found a few different size balls and they would either fall out or bind. I couldn't get a spring to stay in either. Then, hidden beneath 100+ years of crud, I found a threaded hole for a setscrew on the rear of the gear. I found a suitable setscrew and shaped the end so it would fit the groove. It worked OK but needed some resistance. I later noticed a v-groove in the bull gear and I found an old leather key ring and cut of a slither with a square cross-section to match the groove. This provides enough resistance and the pin works like a charm now.
Bad picture but if squint just right you can see the v-groove at 6 o'clock
Hunting American dentists since 2015.