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110V Motor in PM66 or Unisaw?

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Forum topic by rockindavan posted 02-12-2014 04:53 AM 1319 views 0 times favorited 17 replies Add to Favorites Watch
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rockindavan

299 posts in 2102 days


02-12-2014 04:53 AM

Topic tags/keywords: tablesaw

I’m looking for a new (to me) table saw with a $1500 budget. The house I am renting only has 110 running out to the shop with no breaker space to run a 220 line. I want to buy a saw that I won’t outgrow in a few years, but will need to run on 110 for a few years until we buy a house and can properly run a 220 line to the shop.

I would like to buy a used cabinet saw, likely 66 or unisaw, but I’m having some trouble finding whether I would be able to swap out the standard 3hp motor for a 1 1/2hp motor to use for the few years that I can’t get 220, then put the 3hp motor in once the shop is capable. I know they don’t have standard mountings on the original motors, but I was wondering if anyone has tried this or knows whether it is feasible. It sounds a bit crazy to swap out a 3hp motor with anything less, but I would prefer to have a well built saw with a slightly underpowered motor then settle for a contractors saw or hybrid.


17 replies so far

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knotscott

7216 posts in 2841 days


#1 posted 02-12-2014 10:05 AM

It’s not uncommon to find an older Unisaw with a 1hp to 2hp motor in it…it’s less common to find a smaller motor on a PM66, but they do exist.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

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retfr8flyr

327 posts in 1135 days


#2 posted 02-12-2014 10:16 AM

I would suggest increasing your budget some and getting a 1.75 hp SawStop PCS. This is a saw works fine on 110v, you wont outgrow and can easily be upgraded to a 3 hp motor at a later date. Besides having the brake technology it’s a very fine saw.

-- Earl

View levan's profile

levan

472 posts in 2445 days


#3 posted 02-12-2014 12:24 PM

http://www.plazamachinery.com/
might take a look here. One issue might be if your current 110/115 wiring is heavy enough to carry the load.

electricmotorsite.com

1309 Townline Road
P.O. Box 562
Tomah, Wisconsin 54660
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-- "If you think you can do a thing or think you can't do a thing, you're right". Henry Ford

View bigblockyeti's profile

bigblockyeti

3668 posts in 1186 days


#4 posted 02-12-2014 12:46 PM

I think you’re making the right decision to buy a lifetime saw, especially old iron without a bunch of stuff most people really don’t need. An older, less powerful Unisaw motor should fit right where the larger one you’ll be removing is currently. Single phase motors can be tricky to find, so be patient, three phase motors, from what I’ve seen usually out number them by more than 20 to 1. Good Luck!

View Fred Hargis's profile

Fred Hargis

3945 posts in 1959 days


#5 posted 02-12-2014 04:54 PM

Rest assured you wouldn’t have any trouble swapping out the motors on either of those saws, unless the price is a problem. Unisaw motors have a unique bracket for mounting, but they are commonly available. Like Scott said, there are some out there that have the smaller motors that will run on 120V…..consider looking for one of them.

-- Our village hasn't lost it's idiot, he was elected to congress.

View mcase's profile

mcase

446 posts in 2595 days


#6 posted 02-12-2014 05:15 PM

If you read up and get the right advice you can fairly easily put in a sub panel for your shop. Please just get a good book on wiring and do it right, but its not rocket science.

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rockindavan

299 posts in 2102 days


#7 posted 02-12-2014 05:17 PM

I read somewhere that the 110 Unisaws run at 1750 rpm which would need different pulleys. Is this correct?

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rockindavan

299 posts in 2102 days


#8 posted 02-12-2014 05:52 PM

House panel is 100 amp which probably won’t be able to handle sub panel. Other problem is is that it is a rental, which makes doing any serious work much more complicated and getting a permit almost impossible. I have thought about getting the house upgraded to 200 amp and run sub panel or even getting a new service, but either solution will never be monetarily worthwhile for living there 2-3 years.

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mcase

446 posts in 2595 days


#9 posted 02-12-2014 05:55 PM

Rental got it. Yeah, in that case pay strict attention to motor mounts they vary quite a bit.

View bigblockyeti's profile

bigblockyeti

3668 posts in 1186 days


#10 posted 02-12-2014 06:05 PM

The older 120V Unisaw motors that I have seen were 1750rpm, which would require a different drive (maybe driven too) pulley. At any rate I would get the saw first, get the motor you need second and figure out your pulleys last as you don’t want to buy something you won’t be able to use.

View levan's profile

levan

472 posts in 2445 days


#11 posted 02-12-2014 06:12 PM

http://www.electricmotorsite.com/pc/sglwood_unisaw/120925
maybe this one

-- "If you think you can do a thing or think you can't do a thing, you're right". Henry Ford

View GT350's profile

GT350

352 posts in 1447 days


#12 posted 02-13-2014 04:08 AM

Someone mentioned in an earlier post that on a Sawstop 1.75 hp you can easily switch to the 3 hp motor. I don’t believe that is accurate, I talked to Sawstop support about a year ago and they said that is not possible. The question I would have is, do you even need to worry about getting a higher hp saw. If, like me, you cut up to 8/4 and do the occasional dado and also are a hobbyist you may find that you are perfectly happy with a 1 3/4 hp that comes in some cabinet saws.
Mike

View Grandpa's profile

Grandpa

3256 posts in 2141 days


#13 posted 02-13-2014 04:20 AM

Buy an older contractors saw. If you get the right saw it will retain its value. wait for the right price. Sell the contractor’s saw when you need to and go for the big one. By carefully and patiently waiting for the right price on the right saw you can probably use it 3 or 4 years and sell it with no loss.

View rockindavan's profile

rockindavan

299 posts in 2102 days


#14 posted 02-13-2014 04:53 AM

I have considered getting a contractors saw and the realistic side of me says it’s the best way to go. I could spend ~600 for a good used contractor and wait to get a new cab saw in a few years when I can fork over 3000+. I would really like to make a used cabinet saw work on my budget on the other hand, but would likely take some work. I don’t think I could justify upping the budget to 2000 for a saw stop contractor or pcs or pm1000 or other nice 110 saws knowing I want 3hp in the future. Life would be so much simpler if every house had a separate 100A panel in the garage with 220.

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Tenfingers58

96 posts in 2144 days


#15 posted 02-17-2014 06:33 AM

I used to run a 10 gauge extension cord out to the garage to use some 220 tools. I unplugged the dryer and plugged in my extension. The wife just couldn’t do laundry while I was in the shop!

The wire isn’t cheap but it beats upgrading a house you don’t own.

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