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Posted to rec.woodworking
Andy Dingley
 
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Default Making a Variable Speed Bench Grinder

On Wed, 25 Jan 2006 16:16:24 -0800, "Richard Waters"
wrote:

Would putting one of those speed control switches typically used for routers
work on a 3450 rpm bench grinder.


No. That sort of control needs a universal (brushed) motor, not an
induction motor.

Looking for a way to make the rpm's slower.


Buy a half-speed (1400 rpm) motor. Same thing, but the way the windings
are connected is different. Good for HSS turning tools, still too fast
for bench tools

Buy a geared-down slow, wet grinder. This is a _much_ more useful tool
as it can sharpen nearly all woodworking edges. Prices for these
grinders also range from the incredibly cheap upwards (quality to match,
but a £30 machine is still useful)