On Tue, 7 Dec 2004 19:06:07 -0700, Andy Dingley wrote
(in article ):

On Tue, 07 Dec 2004 09:27:00 -0800, Sean Dinh
wrote:

AFAIK, I've not seen a grinder with an universal motor.

For the same power, induction motors are cheaper. For the same
torque, or at slow speeds, brush motors are cheaper. So something
like a grinder or DC that needs minimal torque will generally be
induction.


Also, for a given power Induction is bigger and universal is smaller.
Not many hand held tools will use an induction motor.
-Bruce