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Forum topic by dcp123 posted 05-05-2018 02:29 PM 1650 views 0 times favorited 13 replies Add to Favorites Watch
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dcp123

10 posts in 1637 days


05-05-2018 02:29 PM

Topic tags/keywords: deal cheap massive powermatic table saw 440v

So, there’s a crazy person near where I live in, umm, Bolivia who wants to sell a Powermatic 72 for a number on the very low three figures. It may need a new fence and perhaps some other minor repairs, bit that doesn’t scare me. No, it’s the motor that’s the catch. I’m on the market for a heavy saw to replace my rinky-dink one, so I’m ready to buy a 10hp rotary converter. I’m also planning to add a 50A circuit in my garage for the electric car. That’s not the problem.

This beast has a 7.5 hp 3-phase motor that runs on 440v and I just don’t know if there’s a good way to fake that without burning the house down. So, what does a single phase 220v 7.5 HP table saw motor run? I figure if I’m buying a new motor anyway, I should be able to avoid getting a rotary converter as well. Hey, maybe I could use the original motor in there converter? I could also probably scrape by with 5hp, although it would seem a shame.

Anyway, I’m here for advice. Is it stupid for a guy with one-phase 220v service to think about buying this beast?

If I give up on the crazy idea of buying this thing myself, I’ll share a way for someone with a more suitable shop to get in touch with the seller. You won’t really have to drive to Bolivia to pick it up either.


13 replies so far

View cabmaker's profile

cabmaker

1745 posts in 3323 days


#1 posted 05-05-2018 02:51 PM

How much is practically free ?

Its a nice machine,,,,,put a single phase motor in it if you don’t want to mess with converters

View GR8HUNTER's profile

GR8HUNTER

6467 posts in 1227 days


#2 posted 05-05-2018 02:59 PM

https://www.amazon.com/Leeson-Electric-Motor-7-5hp-230Volt/dp/B00HRXVHB4 :<))

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

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darthford

612 posts in 2438 days


#3 posted 05-05-2018 05:28 PM

I have a Baldor warehouse near me so I get a pretty good price on them from my local motor supply guy. Plus the retail prices you see advertised on-line are way higher than street prices. Somewhat depends on the motor mount, with common motor mounts being cheaper than rigid mount front face. Then the motor design, sealed for harsh environments, I have found Baldor motors built for farm use in harsh environments pretty reasonable because they manufacture a billion farm use motors. If the saw is going to need some oddball mount plus oddball shaft size and/or length e.g. something they only make in lower numbers then its going to be expensive.

I passed on a Powermatic recently because the new motor was going to cost what an entire working machine sells for.

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darthford

612 posts in 2438 days


#4 posted 05-05-2018 05:29 PM

Also, Bolivia can we assume rock hard tropical hardwoods? If so 7.5hp doesn’t seem extreme.

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dcp123

10 posts in 1637 days


#5 posted 05-05-2018 06:27 PM



https://www.amazon.com/Leeson-Electric-Motor-7-5hp-230Volt/dp/B00HRXVHB4 :<))

- GR8HUNTER


That doesn’t seem too unreasonable to me and certainly seems better than the price I’d pay for a 10hp rotary converter plus some sort of transformer to boost the voltage to 440v.

One thing that puzzles me is that the Powermatic data plate says 7.5 HP, 3-phase, 460V and 17.4 amps, which is way more than what you should need (continuously) to get 7.5 HP out of 3-phase 460v power. I’d expect closer to 12A, so maybe that’s a starting current. And the 1-phase 230v one on Amazon states 31A, which seems pretty low, but the motor has great reviews, so I’m sure it works.

So, if I buy it and get rid of my current saw, I’ll be without a saw until I install the new motor and get an electrician to install a new panel near the garage and a 50A socket in the garage.

I may do this.

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dcp123

10 posts in 1637 days


#6 posted 05-05-2018 06:59 PM


Also, Bolivia can we assume rock hard tropical hardwoods? If so 7.5hp doesn t seem extreme.

- darthford


Sorry. Bolivia was the start of a dumb joke I didn’t finish about not wanting to let anyone know where the saw really is for fear that you’d buy it before me. The saw and I are both in the US.

How much is practically free ?

Its a nice machine,,,,,put a single phase motor in it if you don t want to mess with converters

- cabmaker

Less than half the price of a new motor.

View dcp123's profile

dcp123

10 posts in 1637 days


#7 posted 05-05-2018 07:11 PM



I have a Baldor warehouse near me so I get a pretty good price on them from my local motor supply guy. Plus the retail prices you see advertised on-line are way higher than street prices. Somewhat depends on the motor mount, with common motor mounts being cheaper than rigid mount front face. Then the motor design, sealed for harsh environments, I have found Baldor motors built for farm use in harsh environments pretty reasonable because they manufacture a billion farm use motors. If the saw is going to need some oddball mount plus oddball shaft size and/or length e.g. something they only make in lower numbers then its going to be expensive.

I passed on a Powermatic recently because the new motor was going to cost what an entire working machine sells for.

- darthford

I think it mounts on the front face. Don’t all table saw motors mount that way?

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darthford

612 posts in 2438 days


#8 posted 05-05-2018 07:13 PM

Ahaha okay gotcha Bolivia wink wink lol. You might look into renting a drop deck trailer to haul that beast, rentals are fairly reasonable in our area $75.

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dcp123

10 posts in 1637 days


#9 posted 05-05-2018 08:44 PM

Darn. In the time it took me to convince my wife that we have room for it, somebody else snapped it up. Not surprising really. I was hoping the 440V might scare a lot of people away, but no such luck. Maybe what’s surprising is that it was posted last night and was still there at noon today

Now I need to convince her we have room for a Northfield with the unfortunate complication that we don’t. Like not at all.

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GR8HUNTER

6467 posts in 1227 days


#10 posted 05-05-2018 09:11 PM

see rule #5 :<))
http://www.owwm.org/viewtopic.php?f=1&t=158513

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

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dcp123

10 posts in 1637 days


#11 posted 05-05-2018 09:15 PM



Ahaha okay gotcha Bolivia wink wink lol. You might look into renting a drop deck trailer to haul that beast, rentals are fairly reasonable in our area $75.

- darthford

Sounds like a great idea when I buy one. There’s like one excellent deal on Craiglist every week on a heavy duty table saw, so I’ll find another. The guy selling the Powermatic 72 had a forklift to load it, but I was thinking of building a ramp to unload it here. I’ve never used a drop-deck trailer and had actually forgotten that they exist, but that should be way easier. They probably cost twice as much to rent here. It’s nice here, but everything is expensive in Bolivia (SF Bay Area).

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darthford

612 posts in 2438 days


#12 posted 05-06-2018 12:39 AM

There’s one for sale near me for $600, USA Yellow but it looks like it was used hard in a commercial shop.

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dcp123

10 posts in 1637 days


#13 posted 05-06-2018 03:19 AM



see rule #5 :<))
http://www.owwm.org/viewtopic.php?f=1&t=158513

- GR8HUNTER


Very true. I tend to overthink things and can be slow to pull the trigger, so I have a lot of experience with Rule 5. But I also have experience with it’s evil twin, Rule 7. If it isn’t one, it’s the other.

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