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Where to find 2HP+ electric motors?

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Forum topic by Holbs posted 05-05-2017 09:23 PM 495 views 0 times favorited 13 replies Add to Favorites Watch
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Holbs

1723 posts in 1866 days


05-05-2017 09:23 PM

I definitely see future projects this year on both a home made DIY 24” wide drum sander and the Mathias 20” bandsaw, both would require 2HP+ I believe.. Even way down the road, my DIY lumber mill with a 10HP electric motor (didn’t catch if it was 3phase or single phase of the YouTube video of a guy doing a fantastic build). I took a gander on my local craigslist under “tools” section. Not that many 2HP motors out there in northern NV. Where do folks find their used electric 2HP+ motors? I could go new, but Mr Wallet would have a fit. And then, I may have to research different type of motors: table saw motors, compressor motors, pool pump motors, etc.

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter


13 replies so far

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MrUnix

6000 posts in 2036 days


#1 posted 05-05-2017 10:00 PM

I rarely see motors show up on my local CL, and usually the ones that do are huge three phase things that came out of an industrial environment. Smaller (0.5-3HP) motors do occasionally pop up, but are few and far between. I’ve seen a lot more at garage and estate sales, but even then, they aren’t all that common. I do have access to pallet loads of old pool pump motors for free though – and they typically just need new bearings to get working… but most have weird shafts that need to be modified for anything useful.

You might have better luck looking for old machinery that you can re-purpose the motor from. Old industrial fans, trashed table saws or other machinery, etc… Or possibly a variable speed DC motor can be used for your application, which can be had from old treadmills and usually for dirt cheap or free.

Cheers,
Brad

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

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Holbs

1723 posts in 1866 days


#2 posted 05-05-2017 10:03 PM

treadmills have 2HP+ electric motors?
and yes…I always keep eyes on local auctions. 75% of my shop has come from auctions!
Pool pumps & weird shafts. Is it not possible to swap out the shaft if your tear the motor apart? could easy go to a machine shop to modify shaft or buy one online somewhere.

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter

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MrUnix

6000 posts in 2036 days


#3 posted 05-05-2017 10:13 PM

treadmills have 2HP+ electric motors?
and yes…I always keep eyes on local auctions. 75% of my shop has come from auctions!
Pool pumps & weird shafts. Is it not possible to swap out the shaft if your tear the motor apart? could easy go to a machine shop to modify shaft or buy one online somewhere.
- Holbs

Most treadmills will have motors that are 1.5HP and up, although I did find one on a fairly old treadmill that was rated at 1.3hp@90V. Newer ones will have larger motors… I have at least one that is rated at 2hp, and another that is rated at 2.65hp. I even found one that had a 2hp three phase induction motor (and included a VFD as part of the treadmill)!

As for the pool pump motors… no, you can’t swap out the shaft as it’s part of the armature. It can be modified to work with a normal pulley though, it’s just an extra hassle.

Cheers,
Brad

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

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Loren

9627 posts in 3485 days


#4 posted 05-05-2017 10:46 PM

ebay.

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Dark_Lightning

2918 posts in 2946 days


#5 posted 05-05-2017 10:50 PM

I have a 6 HP 220V motor from my old planer molder that I got rid of. The motor is fine, but I think you live pretty far away from me (Simi Valley, CA).

-- Random Orbital Nailer

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Holbs

1723 posts in 1866 days


#6 posted 05-05-2017 11:26 PM

Dark.. next time I head to Disneyworld, I’ll swing buy :)
I’m in Reno.
Loren…ebay. wow…actually have not been to that site in … 5 years. I best go take a look.

Brad.. are you saying a 2.5 or 3.5 CHP (continuous HP) on a treadmill is the same equivalent to my delta unisaw 3HP motor? More research is needed. Looking up past LJ forum posts on the subject….

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter

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Ger21

1074 posts in 2968 days


#7 posted 05-05-2017 11:54 PM

For my Jointer, I bought a new 2HP motor from Ebay. About $200.

-- Gerry, http://www.thecncwoodworker.com/index.html http://www.jointcam.com

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Rick_M

10628 posts in 2217 days


#8 posted 05-06-2017 12:02 AM

Treadmills ratings usually are padded because the flywheel increases the effective torque. Sometimes you will see 2 ratings like 2.5hp treadmill duty/ 1.5hp continuous duty. But Asian motor ratings are often exaggerated. Some people trust the amp rating.

-- http://thewoodknack.blogspot.com/

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builtinbkyn

1921 posts in 777 days


#9 posted 05-06-2017 12:07 AM

Are the Harbor Freight motors any good? Or is this a silly question? LOL They’re less that $200.

-- Bill, Yo!......in Brooklyn & Steel City :)

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Ger21

1074 posts in 2968 days


#10 posted 05-06-2017 12:18 AM

Harbor freight doesn’t have TEFC motors, which is what I wanted. So to me, it was worth the extra $40 for a TEFC motor.

-- Gerry, http://www.thecncwoodworker.com/index.html http://www.jointcam.com

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jonah

1458 posts in 3135 days


#11 posted 05-06-2017 01:15 AM

I’d try to make friends with a local motor repair shop. Often they’ll run across (or even have in stock) older used motors that discerning people wouldn’t want but that would be perfect for your use.

It’ll cost more than finding something at a garage sale or something like that, but you’re much more likely to find something decent.

View Dark_Lightning's profile

Dark_Lightning

2918 posts in 2946 days


#12 posted 05-06-2017 03:09 AM



Dark.. next time I head to Disneyworld, I ll swing buy :)
I m in Reno.
Loren…ebay. wow…actually have not been to that site in … 5 years. I best go take a look.

Brad.. are you saying a 2.5 or 3.5 CHP (continuous HP) on a treadmill is the same equivalent to my delta unisaw 3HP motor? More research is needed. Looking up past LJ forum posts on the subject….

- Holbs

No problem, but 6 HP is probably overkill for your application.

-- Random Orbital Nailer

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MrUnix

6000 posts in 2036 days


#13 posted 05-06-2017 03:45 AM

I’ve got some DC motors that have two HP ratings like Rick mentioned… treadmill duty and continuous duty. I believe every one I’ve run across is US made however. Here is the label on a 2HP motor that lists it at 18 amps:

At that amperage and voltage, it makes it an 1800 watt motor… since 1hp = 746 watts, 1800/746 puts it at ~2.4hp if it were 100% efficient, which of course, they aren’t – but they are slightly more efficient than induction motors, so the HP rating appears accurate. Also – with a PWM type controller (also usually found on a treadmill), there is very little loss of torque throughout the speed range.

Oh, as an added bonus… you will probably find an incline motor in the treadmill as well – that would be cool to use to adjust the bed on your drum sander :)

Cheers,
Brad

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

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