Help--Table Saw motor changes speed !

What kind of motor would that be? Your saw is rather young to have been supplied with a repulsion-induction motoe. If it has a universal motor, it is rather old to have the original one.

In the case of the repulsion-induction motor, a failing centrifugal switch would cause this problem. There may be other reasons as well.

If you have a universal motor, I don't know. The no load speed of these things is usually limited by friction in the bearings. Perhaps the bearings need replacement. There may be other reasons as well.

I would take it to an electric motor repair place. Those guys see more bad motors in a week than we do in our entire life.

Jim

It has the original motor. I don't know what type it is, just that it is not a separate motor, but instead is integrated into the arbor that turns the blade (via a very short 6" belt). Today I disassembled the saw, removed the blade and turned it over (table down) and ran the motor for awhile. At first it varied speed as before, but after a few minutes it started running at constant speed. I guess tomorrow I'll turn it back over and see if it still runs constant or varies again.

Woody

It is a universal motor which uses the direct drive method. This is the same mechanism used in circular saws.

You could take it apart and lubricate the bearings.

Jim

I greased up the transmission and noticed that a lot of the grease was coming out of the joints, so I checked all of the bolts and found many of them loose from years of vibration. I guess that was also preventing the grease from being fully distributed inside, and once I tightened the bolts and re-greased, the problem was fixed.

Thanks for your suggestions, Jim.

Woody