Scott's Atlas / Craftsman 101.07403 12x36" Lathe, modifications and projects. Stone Mountain, GA Unique Visitors:

The lathe power feed works fine. However, I hate having to oil the gears and the mess and noise. Some of my intermediate gears were not cut that well and make noise. I decided to use a separate power feed.

The feed consists of a 120 RPM DC gearmotor and and brass adapter to fit the end of the feed screw.

Was tempted to mount the motor on the cover but don't want to drill a set of holes in it.

 The adapter is some 1" brass. I ended up cutting a slot for the woodruff key. I glued the key in with a bit of locktite as I did not like it falling out when I changed gears. A set screw would probably work better if the key was removed.

I initially just made an adapter to fit the threaded end of the shaft. I found using a manual tap, the threads ended up crooked. The bolt is 1/2", a bit too small for any of my threading tools.

A mounting bracket was made from some 1" angle iron.

Ideally I would make one for the opposite end of the feed screw with some kind of clutch. Then I could switch beteen the gear and electric feeds. Would also allow the gear cover to be closed.

I guess if I added and encoder I could do CNC with it.

I made a small variable power supply, 2-24V at about an amp. The motor takes less than 1/4 amp. So now I have a knob for and adjustable feed speed. It is silent and no messing with gears.

I now have a box mounted under the lathe with a forward/reverse switch for the spindle and a control for the spindle speed (through a VFD.) It also has a reversing switch and pot for the power feed.

Left knob is feed speed. Right knob is spindle RPM. Top switch is direction, center off. Bottom switch is feed direction.