"sailor" wrote in message
oups.com...
I have an older Unisaw with a 1 hp Bullet motor.

It started acting up today. When I turn it on, it runs at reduced speed
for about 10 seconds, then kicks in to hi speed.

Sometines when it is turned on it just makes an unhappy hum. I then
rotate the blade a bit, and turn on again, and it starts and runs at
reduced speed for about 10 seconds, then kicks in to hi speed.

When it is running at reduced speed, the brushes (lots of brush left)
arc a bit. When it kicks to hi speed, the arcing stops. I think the
brushes might be just for starting.

Anyone familiar with these motors, and have an idea of the problem?

Thanks

Only universal or repulsion-induction motors have brushes. What does the
motor plate say?

The brushes in a repulsion-induction motor are only used for starting. They
retract as the speed goes up. However, as this type of motor was
discontinued in the 1950s, your motor is quite old. Of course, such motors
are still repairable.

Jim