kevin24018
spending too much on rocks
Member since February 2012
Posts: 284
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Post by kevin24018 on May 8, 2017 11:15:43 GMT -5
I'm not sure if there is a list that already exists, but I haven't really found one and the question seems to come up ALOT. If you want to build something a motor needs to have certain characteristics, appropriate rpm (reasonable pulley adjustment), cost, adequate torque, regular house electric and a way to attach a shaft (anything I left out?)
The question is what can you get a used motor from?
Washer motor
variable scroll saw
Sewing Machine Motor
treadmill
variable speed router
Dental Polishing Motor
drill press motor
lathe motor
There are some searches I did on ebay using "variable speed motor", although not sure about putting a plug on some of these, might be more to it then just doing that, dunno.
1750 rpm motor brings up some different results that would work for some things.
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Post by Jugglerguy on May 8, 2017 13:50:56 GMT -5
I'm no expert in this field, but I have had to find some used motors for various used machines I have purchased. I don't think that variable speed motors are preferred for most equipment.
I went to the local appliance store and asked about washer and dryer motors. The guy told me that they would not remove them from old appliances and that it was illegal (or maybe a lawsuit risk) for them to sell me used motors. He did tell me that I could rummage through old washers and dryers setting outside and remove them myself. He then went on to say that the motors in appliances do not have housing around them. They're just open. At that point, I decided to take his word for that and not bother.
I've also read here that some people have good luck buying motors from scrap metal places. I haven't tried that one.
I bought one from a heating/cooling plumber. That one was removed from a furnace and works great for me. He hasn't gotten me any since and all the other plumbers were unwilling to collect them for me.
I tried our Habitat for Humanity Restore and was told that motors came in rarely and were in demand so they don't last long.
Basically, it's very difficult for me to find used motors where I live. Other people seem to find them for $5-$10 easily.
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kevin24018
spending too much on rocks
Member since February 2012
Posts: 284
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Post by kevin24018 on May 8, 2017 14:45:20 GMT -5
I'm no expert in this field, but I have had to find some used motors for various used machines I have purchased. I don't think that variable speed motors are preferred for most equipment. I went to the local appliance store and asked about washer and dryer motors. The guy told me that they would not remove them from old appliances and that it was illegal (or maybe a lawsuit risk) for them to sell me used motors. He did tell me that I could rummage through old washers and dryers setting outside and remove them myself. He then went on to say that the motors in appliances do not have housing around them. They're just open. At that point, I decided to take his word for that and not bother. I've also read here that some people have good luck buying motors from scrap metal places. I haven't tried that one. I bought one from a heating/cooling plumber. That one was removed from a furnace and works great for me. He hasn't gotten me any since and all the other plumbers were unwilling to collect them for me. I tried our Habitat for Humanity Restore and was told that motors came in rarely and were in demand so they don't last long. Basically, it's very difficult for me to find used motors where I live. Other people seem to find them for $5-$10 easily. ah yeah good point, forgot about that, not all the motors have housing. I have heard the blower motors from furnaces are useful as well. I live is a smallish area, haven't looked locally myself yet. Don't need any motors atm so.... |
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Post by pauls on May 8, 2017 16:13:51 GMT -5
I found a good source for used motors if you are in the country is water pressure pumps, they are good heavy duty motors designed for a lot of work usually with a stainless shaft.
You may be able to pick them up for scrap value at your scrap dealer, usually they have been thrown out because the pump has run dry and siezed, motor is OK because thermal cutout has then activated.
Other things you might find wrong is a faulty capacitor these are cheap to replace. Sometimes the pressure switch contacts are jiggered but you are tossing them anyway so no big deal.
We live in a throwaway society, these things are just crying out to be reloved.
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Post by manofglass on May 8, 2017 16:32:00 GMT -5
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notjustone
spending too much on rocks
Member since January 2017
Posts: 426 
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Post by notjustone on May 8, 2017 22:34:53 GMT -5
I'm no expert in this field, but I have had to find some used motors for various used machines I have purchased. I don't think that variable speed motors are preferred for most equipment. I went to the local appliance store and asked about washer and dryer motors. The guy told me that they would not remove them from old appliances and that it was illegal (or maybe a lawsuit risk) for them to sell me used motors. He did tell me that I could rummage through old washers and dryers setting outside and remove them myself. He then went on to say that the motors in appliances do not have housing around them. They're just open. At that point, I decided to take his word for that and not bother. I've also read here that some people have good luck buying motors from scrap metal places. I haven't tried that one. I bought one from a heating/cooling plumber. That one was removed from a furnace and works great for me. He hasn't gotten me any since and all the other plumbers were unwilling to collect them for me. I tried our Habitat for Humanity Restore and was told that motors came in rarely and were in demand so they don't last long. Basically, it's very difficult for me to find used motors where I live. Other people seem to find them for $5-$10 easily. my woody tumbler uses an open dryer motor right now till I find something different. |
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Post by Rockoonz on May 9, 2017 0:04:21 GMT -5
My best prices lately have been Amazon.
If it's going on a piece of equipment you plan to walk away from while it's running get one with a heat overload fuse, preferrably with push button reset. Fires suck.
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,640
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Post by QuailRiver on May 9, 2017 0:16:12 GMT -5
With the exception of saws larger than 14", most lapidary cabbing, slabbing, and trimming equipment can be run on 1/3hp, 1750 rpm (give or take a few rpms), continuous duty motors. This is the most common motor there is. They are used on small to medium size drill presses, joiners, wood planers, wood lathes, belt sanders, squirrel cage fans, industrial floor fans, industrial wall mounted exhaust fans,and much more. And yes the enclosed type did use to be used in old clothes washing machines. The washing machines always wore out before the motors did so there are a lot of these great old motors still sitting around in barns and sheds. Estate farm auctions are a great place to find these used motors. So are flea markets. Also state, school, and military surplus auctions.
Larry C.
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Post by coloradocliff on May 9, 2017 0:35:38 GMT -5
I'm no expert in this field, but I have had to find some used motors for various used machines I have purchased. I don't think that variable speed motors are preferred for most equipment. I went to the local appliance store and asked about washer and dryer motors. The guy told me that they would not remove them from old appliances and that it was illegal (or maybe a lawsuit risk) for them to sell me used motors. He did tell me that I could rummage through old washers and dryers setting outside and remove them myself. He then went on to say that the motors in appliances do not have housing around them. They're just open. At that point, I decided to take his word for that and not bother. I've also read here that some people have good luck buying motors from scrap metal places. I haven't tried that one. I bought one from a heating/cooling plumber. That one was removed from a furnace and works great for me. He hasn't gotten me any since and all the other plumbers were unwilling to collect them for me. I tried our Habitat for Humanity Restore and was told that motors came in rarely and were in demand so they don't last long. Basically, it's very difficult for me to find used motors where I live. Other people seem to find them for $5-$10 easily. Have you been hitting yard sales. When I was younger and poorer, I would run an ad looking for used unit heaters ( large hanging garage type gas heaters for my greenhouses.) I wonder if putting an ad on Craig list or even a small sign in front of your house if your neighborhood is conducive to such blatant solicitation attemps...grin. |
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Post by coloradocliff on May 9, 2017 0:57:06 GMT -5
With the exception of saws larger than 14", most lapidary cabbing, slabbing, and trimming equipment can be run on 1/3hp, 1750 rpm (give or take a few rpms), continuous duty motors. This is the most common motor there is. They are used on small to medium size drill presses, joiners, wood planers, wood lathes, belt sanders, squirrel cage fans, industrial floor fans, industrial wall mounted exhaust fans,and much more. And yes the enclosed type did use to be used in old clothes washing machines. The washing machines always wore out before the motors did so there are a lot of these great old motors still sitting around in barns and sheds. Estate farm auctions are a great place to find these used motors. So are flea markets. Also state, school, and military surplus auctions. Larry C. |
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Post by coloradocliff on May 9, 2017 1:02:22 GMT -5
With the exception of saws larger than 14", most lapidary cabbing, slabbing, and trimming equipment can be run on 1/3hp, 1750 rpm (give or take a few rpms), continuous duty motors. This is the most common motor there is. They are used on small to medium size drill presses, joiners, wood planers, wood lathes, belt sanders, squirrel cage fans, industrial floor fans, industrial wall mounted exhaust fans,and much more. And yes the enclosed type did use to be used in old clothes washing machines. The washing machines always wore out before the motors did so there are a lot of these great old motors still sitting around in barns and sheds. Estate farm auctions are a great place to find these used motors. So are flea markets. Also state, school, and military surplus auctions. Larry C. Thanks... you just told me where a 1/3 hp motor is for an old tired tumbler motor. When one of my big greenhouse heaters die and spits out a heat exchanger, they have blower motors driving the big fans. Duh.. I have a couple out back. Will check tomorrow. Was going to get a1/2 horse because, I plan on rebuilding and adding another 15 pound barrel.
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Post by deb193redux on May 9, 2017 15:40:53 GMT -5
unless the tumbler is large, they usually use 1/4 or less. Lots of tumblers use 1/6hp. a 2-wheel grinder can do 1/4hp, but 4/6 wheel, or saws, I think 1/3hp is good. you could want variable-speed for tumbler, but grinders and saws just use fixed-speed.
for a tumbler, you can consider one with a gearbox to direct drive the shaft and avoid belt. Otherwise you want 1750 RPM.
I think that a rating for continuous duty and sealed and/or fan-cooled is a plus.
capacitor start is a real plus. if you also get capacitor run, so much the better.
be careful with some heater/blower motors because thy are intermittent duty.
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