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Help with Westinghouse motor

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Forum topic by David posted 05-16-2019 05:04 PM 217 views 0 times favorited 9 replies Add to Favorites Watch
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David

29 posts in 3323 days


05-16-2019 05:04 PM

Hi everyone. I was fortunate enough to get a free Atlas tablesaw from Craigslist. It came with a Westinghouse 1.5hp motor. I am trying to resuscitate it. I’ve scoured the net for information with very little success. I’m hoping someone has ANY information about this motor or one in the same model class. Here’s the specs:

-- I love my SS Mark V. American made quality.


9 replies so far

View splintergroup's profile

splintergroup

2641 posts in 1586 days


#1 posted 05-16-2019 05:09 PM

Looks like a fairly standard induction motor. What are you trying to do/fix?

View ctsdeglpks's profile

ctsdeglpks

285 posts in 736 days


#2 posted 05-16-2019 05:30 PM

Whats wrong with it? Specs are two fuzzy its 115/230V but what are the amp draws?

View MrUnix's profile

MrUnix

7361 posts in 2563 days


#3 posted 05-16-2019 06:40 PM

Picture is too blurry to make out much other than verify it is a 1.5hp single phase motor that can run on either 115(120) or 230(240) volts ;)

I’d like to know what you are trying to fix as well. Also, that might be a sleeve bearing motor that needs oil every now and then – check where the arrow is pointing to see if an oil fill hole is present… it looks like there might be one but it’s all caked over with sawdust.

Cheers,
Brad

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

View David's profile

David

29 posts in 3323 days


#4 posted 05-16-2019 08:48 PM

Sorry for the lack detail. I am trying to replace some parts.
Bearings (easy to determine size)
Capacitor (markings worn off quite a bit)
Thermal circuit breaker (hard time finding a matching replacement)

I’ll upload some pics when I get back to my laptop.

-- I love my SS Mark V. American made quality.

View David's profile

David

29 posts in 3323 days


#5 posted 05-17-2019 01:51 AM

The thermal circuit breaker.
I can’t find a replacement with 3 terminals.

-- I love my SS Mark V. American made quality.

View CaptainKlutz's profile

CaptainKlutz

1242 posts in 1858 days


#6 posted 05-17-2019 02:40 AM

Wow, blast from past. AMP brand is now TE connectivity. Hard to find old AMP parts due too changes to connector industry over the years.

Not an expert, but the only 3 terminal over load breakers I have seen were units with indicator lights? They still make the lighted thermal breaker rocker switches with 3 terminals. If you have a light indicating unit, could use regular 2 wire unit with same rating without indicator wiring.

Suggest you find a local motor repair shop that sells parts and show them what you need. They can offer solutions if they have the old part in hand.

Best Luck.

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

View David's profile

David

29 posts in 3323 days


#7 posted 05-17-2019 02:59 AM

The thermal circuit breaker.
I can’t find a replacement with 3 terminals.


Wow, blast from past. AMP brand is now TE connectivity. Hard to find old AMP parts due too changes to connector industry over the years.

Not an expert, but the only 3 terminal over load breakers I have seen were units with indicator lights? They still make the lighted thermal breaker rocker switches with 3 terminals. If you have a light indicating unit, could use regular 2 wire unit with same rating without indicator wiring.

Suggest you find a local motor repair shop that sells parts and show them what you need. They can offer solutions if they have the old part in hand.

Best Luck.

- CaptainKlutz

Unfortunately the top of the breaker is busted and missing parts. Can’t tell if it was lighed or push button for reset.

Thanks for the help.

-- I love my SS Mark V. American made quality.

View CaptainKlutz's profile

CaptainKlutz

1242 posts in 1858 days


#8 posted 05-17-2019 08:07 AM

If top is missing, helps me think it might have been a rocker switch?
Regardless, overloads are not very durable to impact, because as they aged the plastic got brittle.

Indicating breaker should be easy to figure out from wiring?
- one wire comes in from AC input (usually black/hot wire)
- second wire is breaker output, which goes to motor input (Usually black on 120V motor, probably has several winding wires attached together in side the motor)
- third wire goes to ground or neutral.

2 wire thermal breakers do not use ground wire for light.

There is nothing magical about thermal overload breaker.
Typically use a overload breaker rated at 125% of motor full load amp (FLA) rating.
Buy proper rating and install.

Safety note: regardless of thermal overload breaker, need to make sure proper size line/wire breaker is protecting the circuit too. Still need short circuit protection at panel. Thermal overload is there to prevent fire if motor locks up for extended time only.

IME – a motor running 110/120V, with 1.5HP rating has FLA of 16-20 amps. Proper over load breaker would be 20/25A. But at same time the official industrial recommendation for 1.5HP motor is also a 30A rated circuit. :-0)

If my 120V supply line was 20A, would limit the overload to 20A. It might trip once a blue moon during hours long cutting sessions, but it’s better to reset thermal overload at machine, then the find/reset supply breaker. Identically, if supply line has 15A breaker, would use 15A overload. Note that any 1.5HP motor with a higher 20A FLA would likely trigger a 15A instantaneous trip breaker occasionally during startup, so larger overload would do nothing above 15A unless the breaker was changed to slow trip motor rated breaker.

Hope this helps.

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

View David's profile

David

29 posts in 3323 days


#9 posted 05-17-2019 12:20 PM

Thanks CPTKlutz for that very informative reply. Answers my research into a viable replacement.

Here’s a picture of the top of the breaker.
I apologize for all my pictures being sideways.
I can’t figure out how to correct it.

-- I love my SS Mark V. American made quality.

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