Where to buy a used 20HP 3 phase motor for building a RPC?

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Forum topic by SweetTea posted 01-17-2019 01:57 AM 553 views 0 times favorited 7 replies Add to Favorites Watch
View SweetTea's profile


430 posts in 1047 days

01-17-2019 01:57 AM

I am looking to purchase a used 20HP electric motor to make a RPC and was wondering if you guys have any suggestions on where to find one for the best price? I keep hearing that these things can be found dirt cheap, but after browsing google I can not find any that are below $300-$400. Can any of you fellows suggest a good place to look? What kind of price should I expect to pay?

7 replies so far

View jamsomito's profile


432 posts in 813 days

#1 posted 01-17-2019 02:01 AM

Seeing as a new 3HP motor can be had for $3-400, I’d say that’s a steal on a used 20HP. Those are not small motors.

View SweetTea's profile


430 posts in 1047 days

#2 posted 01-17-2019 11:17 AM

Seeing as a new 3HP motor can be had for $3-400, I d say that s a steal on a used 20HP. Those are not small motors.

- jamsomito

That is not a steal on a 3 phase motor. I keep being told that used 3 phase motors are cheap and plentiful. I have a friend that says for a used 3 phase 20HP motor I should pay well under $300.

View Fred Hargis's profile

Fred Hargis

5540 posts in 2880 days

#3 posted 01-17-2019 11:45 AM

No idea on what a fair (or normal) price on a motor that size would be, but I’d check with any local motor shops and see if they have one. It’s possible that your friend is overly aggressive with his expectations.

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

View Nubsnstubs's profile


1563 posts in 2117 days

#4 posted 01-17-2019 01:36 PM

It cost $268 to ship to my location. So, consider that unless you can get it locally…..... Jerry (in Tucson)

-- Jerry (in Tucson)

View HokieKen's profile


9491 posts in 1526 days

#5 posted 01-17-2019 02:20 PM

A lot of it is what’s available locally. As Jerry pointed out, shipping a motor that big isn’t cheap.

Turns out the one Jerry linked is about 30 miles south of me :-) Unfortunately, I’m not the one in need! Where are you located? Maybe folks within driving distance of you might have some leads?

-- Kenny, SW VA, Go Hokies!!!

View CaptainKlutz's profile


1348 posts in 1881 days

#6 posted 01-17-2019 04:15 PM

Below $300 for 20HP motor? Hmm….
This is not impossible, but not something I see very often?
Scrap value on 20Hp motor is well over a $100.

Challenge with old bargain motors in long dusty storage after major use; typically means new bearings needed. Removing, replacing large motor bearings is takes a large free standing hydraulic press and overhead winch. Motor shops I know will charge $200 for large bearing work.

One common source for large 15-20HP motors is hydraulic power packs. Can find large power packs at auctions cheap occasionally.

LOL, PHX has a 20HP motor on a RPC on our CL right now for $400:

Best Luck.

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

View bigblockyeti's profile


5742 posts in 2108 days

#7 posted 01-17-2019 05:34 PM

I’ve seen plenty in and around Cleveland where I used to live in the burbs. The trick is letting the right people know you’re in the market. We used to go through 10hp – 20hp motors like crazy when I was working in a plastics recycling plant. The whole process was basically a prototype plant heavily subsidized by the department of energy and the EPA. Too much was slapped together and different motors were either being damaged or were way oversized in their application, as a result many were being changed frequently. Even the bigger 20hp motors were well under $50 scrap value, only more if they were separated into different metals. We had a used industrial seller that had everything we would frequent often, including many motors:

-- "Lack of effort will result in failure with amazing predictability" - Me

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