soundmotor
super modified
I don't think it will have enough power to do any actual work on the lathe.
It will probably spin it just for show, however.
Turning 0.125" stock would be huge on a jeweler/watchmaker lathe.
I don't think it will have enough power to do any actual work on the lathe.
It will probably spin it just for show, however.
It is a Kendrick & Davis, "The Special". 110 VAC, 0.35Amps, 3500 rpm, 2 pole.
Turning 0.125" stock would be huge on a jeweler/watchmaker lathe.
soundmotor: The label on the motor is shown in post #1, which lists the volts as 110 and the amperage as 0.35. I made the assumption that it was not 110vdc. There is a bakelite switch in the base that swaps the field leads to reverse the rotation of the motor. It worked OK plugged into the 115vac outlet in my house, but I don't think I'll try it with 110vdc.
Pio: I mentioned before that I ordered a sewing machine motor as a backup in case the refurb of the vintage motor doesn't work out. The sewing machine motor turns at 6,000rpm and the vintage motor turns at 3,500. Assuming that the lathe mfg (Wolf, Jahn in Germany) knew what they were doing, I am taking steps to reduce the 6,000 to ~3,000 with a 2:1 pulley reduction.
I turned these two pulleys today at the wood shop. I think I can put them together on a shaft with bearings in a jig and link it between the sewing machine motor and the lathe.
View attachment 1061788
Hopefully I can find replacement brushes and get the vintage motor running AOK.
Or use a DC motor & controller w/ speed variability from ~100-7500RPM.
personally I'd just knock the original motor apart and lube it up. Motors aren't rocket surgery. The most complex thing about this one is the brushes, and if they can be removed you're golden. Holding the brushes back to assemble the motor is the hardest part.
I'd prefer to be able to set the speed and leave it.
It's done on the multi ratio pulley set from a fixed motor speed.I guess I am missing something here, besides being a flat dumb novice wrt lathes. How else would you change speeds if you did not want to change the voltage to the motor?
Hell, I don't even know the reasons to change speed if not because of the type/density of the material.