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Forum topic by runswithscissors posted 04-03-2016 04:29 AM 879 views 0 times favorited 1 reply Add to Favorites Watch
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3128 posts in 3031 days

04-03-2016 04:29 AM

The end was in sight on a project, when the Unisaw motor quit with a bang. Uh oh. Took it off, and headed for a local electrical shop to have it diagnosed. Turns out that shop was closed, and assuming it was their lunchtime, I headed over to Grizzly to kill a half hour or so. The guys at Grizzly told me the motor shop was winding down (maybe tired of all the rewinding over the years), and was taking no new business.

Grizz offered to have their shop technician check it out, and after a few minutes he returned and showed me how a wire from the start capacitor had broken right off. The sudden short and discharge would explain the bang I heard. When I considered the $70 minimum/$70 per hour shop time, plus new bearings and new capacitor, I decided I was halfway to a new Grizzly 3 hp motor. Their motor has almost the same mount as the Unisaw (the older G1023 was a Delta clone), so I took a new motor home.

The new motor, alas, had a 7/8” shaft (Delta has 3/4” shaft), so that meant trying to bore out the 3-groove pulley. Of course I didn’t do a perfect job of that, and the resulting vibration, though not really felt through the cast iron, was likely to be hard on the motor bearings over time. Grizzly, about that time, was out of stock on the pulley I would have needed, so the saw had to go into temporary retirement.

I had been dodging around the Delta motor that lay in my carport for a few weeks, but finally decided to dig into it myself. Since I figured it was toast anyhow, what could it hurt?

Turns out putting in a new wire for the start capacitor was easy peasy, new bearings were not hard to install, and the capacitor itself proved to be good. Since I had ruined the original pulley, I had to bite the bullet and get a new/used one off Ebay. So now I’m back in business with the Delta motor, and have a Grizzly 3 hp motor on my hands.

So far I haven’t come up with another use for the Grizzly, and can’t take it back (I had to slightly modify the motor mount to give it sufficient adjustability for belt tension). Unless I can think of something to use it for, I guess it will have to go on Craigslist.

I have kicked myself in the butt over this foolishness ever since, but because I am old and weak, I think I’ll have to hire someone to do the butt kicking on my behalf for a while.

Oh, the CL used pulley cost more than the Grizzly new one (if they had it in stock).

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

1 reply so far

View FancyShoes's profile


592 posts in 2370 days

#1 posted 04-05-2016 01:24 AM

You should be able to sell the motor. There are plenty of guys looking to convert their 3 phase motors to single phase, keep the price firm, it might just take some time to sell it.

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