The one I have uses a small universal motor, not the standard 1 hp motor
that is available everywhere.

Robert Galloway wrote:

The craftsman table saws I'm familiar with use a pretty generic motor.
You can probably find a 1 1/2 hp that will fit in the space. Got to be
a local place that sells overstock and surplus motors. 1 - 1 1/2 hp are
in the prime range to be available cheap.