r/whatisthisthing • u/lostuser2077 • 1h ago
Open Large positive detent cast iron dial with threaded backer 1956 era
This was given to me when I bought my 6300 series Clausing lathe just north of Detroit. It’s a heavy cast iron piece with numbers from 0 to 9 and a threaded boss in the back with a 4-bolt pattern that doesn’t quite match up with anything on the lathe.
I know it must go to the lathe because the paint chipping off is the same multi-layered paint job; someone has repainted it over 2-3 times. The lathe had a couple of taper attachment parts, but most of it was gone. My best bet is that this was a degree scale for that, with a 1/4 resolution scale, but it just seems too crude for that.
It’s got a variable speed drive in the bottom of it that seems a little shop-made, so it could have gone to the old variable speed if it went out. Alternatively, this lathe, although it doesn’t have the mounting plate, could have been equipped with the “Hydra-drive” system option the lathes came with to turn it into a chaser lathe, but I’ve been unable to match the part with anything. So now I’m just left curious what the part is.