torqueman2002
Well-known member
Interesting, my 397.19440 has a cap which I assume is for starting.![]()
Sears sold these block grinders for decades, different suppliers and variations exist.
If it is a start cap. there will be a NC switch that opens at a set RPM to take the cap and start winding out of the circuit.
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Since this original post, I have rebuilt and opened a couple of grinders that use a start relay with a start capacitor.
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For lots of additional information, including a link to electric motor designs; follow this link:
http://tinyurl.com/CM-Block-Grinder-Info
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how many horse power was it?

