Be careful. Some of these small motors may be intermittent duty,and you don't want that for a table feed. Also,a table feed takes some power.
I made a simple,1 speed power feed for a mill drill years ago with a Bodine right angle gear head motor and a mating worm and spur gear. The spur gear was bronze. I can't recall the h.p. of the Bodine,but it was a fractional h.p. motor. You can pick up such motors at places like Surplus Sales. Mine,with the worm gear,was geared down pretty slow,but had plenty of power. I had a reverse switch on it. It beat the heck out of hand cranking,which I'd done for a few years!!
I had an idea to use a rotisserie motor to power my #4 Burke,but got the Bodine together. I don't know if a rotisserie motor would be powerful enough for something as large as a Bridgeport,but it isn't intermittent duty. My Burke table was only about 4" x 18",or so. Later,I put my unit on a mill drill.
For a long time,by now,I've gotten Servo units for my Bridgy. Have one on X and Y feeds. I have one for the knee feed,but haven't put it on yet. Fortunately,I've been able to pick up good used ones much cheaper than new ones.
