83-651 3hp wired for 120V. Bad magnetic starter. Help find 120V magnetic starter?

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Forum topic by zodd07 posted 12-08-2018 11:16 PM 811 views 0 times favorited 3 replies Add to Favorites Watch
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3 posts in 777 days

12-08-2018 11:16 PM

I just bought this saw for 325 earlier this week – partly because the seller couldn’t get it started. I dug into the issue and found that the magnetic starter was bad. I am able to start the saw by manually flipping the magnetic switch (yeah i know, but I needed to know if I needed a motor). The shutoff switch does work properly. If I press the green button, the coil makes a loud buzzing sound but never closes.

The saw does have a lot of vibration , I have replaced the belts and tried to clean/loosen the bearings on the arbor as best I could without removing the top. If anyone else has tips for restoring an old barn saw and reducing vibrations I am open.

So to my questions -

1 – I dont see any 120V magnetic starters out there like the one of the saw. The layout of the new ones looks similar to mine but mine is wired from the center tap not across both legs of the transformer. Could I still do this on the new ones? Would the rating be 1/2 the 240V rating for load?
2 – The magnetic start, which appears to be original, is only rated at 1HP for 120V. Did delta do this at some time or is this an aftermarket starter? I am thinking this may be why the starter has failed.
3 – Will switching to 240V reduce vibrations if the saw is already turning on? If I am not tripping breakers on 20A 120V circuit should I still consider switching to 240V?

3 replies so far

View MrUnix's profile


8359 posts in 3172 days

#1 posted 12-08-2018 11:33 PM

Something doesn’t jive… it looks like that motor is rated at 32A @ 120v. My guess is that it’s wired for 240 and you are trying to run it on 120v. You need a minimum of a 20A 240v circuit for that machine.

As for vibrations, and given the age/condition of the machine, IMO you should probably go ahead and replace the belts and bearings (arbor and motor both), and then properly set the belt tension.


PS: Post a better picture of the starter. Sounds like a NEMA size 0 (zero), but can’t tell from the picture.

-- Brad in FL - In Dog I trust... everything else is questionable

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3 posts in 777 days

#2 posted 12-08-2018 11:52 PM

I did replace the belts but just blew out and added some lubricant from the outside of the bearings to loosen them for the time being. Trying not to spend money until I’ve identified all the issues! The vibrations are not completely terrible but I was hoping for it the purr with the new belts.

Also, it did trip the breaker on an extension cord – but with the larger wiring on a short length it seems okay! I must be riding offly close to the breaker limit. I have not had it shut down under load.

Would it run on a single leg of 240V? If so, I imagine this would cause a lot of vibration? It does run now and is definitely on a 120V plug. I just have to flip the magnetic starter to get it started.

edit – forgot the picture!

View zodd07's profile


3 posts in 777 days

#3 posted 12-09-2018 12:06 AM

The killawatt meter shows 25A during startup but 8A during idle. Looks like I will need to rewire for 240V. Do you think the magnetic switch might start working with 240V?? It sounds like it really wants to close now but not enough juice.

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