I just got an old craftsman wood lathe circa 1930’s that has been sitting idle in a friends basement for about 40 years. Its bed is about 40″ long plus the head stock and could turn about a 12″ +/- diameter cylinder. Unfortunately the motor is shot and does not list the HP or RPMs. What is an appropriate size/speed motor to get. It has a 4 or 5 speed pulley setup but I don’t know the ratios.
Thanks
Rich
Replies
I've been very happy with the 3/4HP motor on my grizzly of approx. the same size as your lathe.
I keep a stock of motors in the shop in case things break. I also use them to make specialty tools like grinders, sanders, etc.
Let me know if you need a motor.
Rich,
I have a collection of old Sear's manuals. A quick search turns up that they recommended a 1/2 HP, or larger, 1750 RPM motor for that size lathe. You won't have a problem if you go to a larger HP motor but you should keep the same RPM's.
Watch your motor shaft diameter though, if it isn't the same size as the old motor, you will have to buy a new pulley. Step pulley sizes are standardized so a new pulley, if you need one, should match the steps on the lathe's headstock pulley.
If you use a link belt it will make speed changes very simple because you won't have to shift the motor to change speeds.
John W.
Thanks for the advice. I had been looking through the Grizzley catalog at their 3/4HP 1725 rpm motor. I will need to get a new pulley as the original motor has a 1/2" shaft and the Grizzley has a 5/8". Griz didn't have any 4 speed stepped pulleys though. Any ideas where to get those? I'll look through Grainger and McMaster-Carr for starters.
Thanks again
Rich
Rich,
Grainger definitely has them, saw them in their catalog this morning.
John W.
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