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Ace Hardware grinder Sync conversion?



Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>

Hello All,

Recently, side jobs are increasing cutting into my retirement time, so my DC coil work/play is getting side lined for awhile. Consequently, I was wondering if a relatively new 3450 1/3 horse power 3.5 amp inexpensive grinder from Ace Hardware (China) could be converted to a 3600 synchronous motor. There is no endplay and it runs smooth. As this may be temporary, I don't want to fiddle with phase control and such and am willing to make a few starts to get on the AC peak.

I bought a 1/2 Hp 5/8" as everything is way less Flimsy and therefore safer.

The shaft is 1/2" which is the way my rotor is set up There is no apparent startup cap although I have not disassembled the base. It will have to have enough torque after the modification to sync up a 11.75" 3/8" G10 disk with 12 nut cinched 3/8" brass all tread mounted 1/8" X 1.5" tungsten electrodes. (since this would run 720 BPS! I will probably remove half of them)

In know this subject has been thoroughly milked; but, I know enough to be dangerous with AC motors:-) I guess I could run async; however, I would rather not subject my new CD caps to that perceived abuse?

If anyone has tried this conversion with this setup I would appreciate taping your experience or if the motor is unsuitable, comments would be welcomed.

Regards and Long Sparks,

Jim Mora
Ojai,Ca.