mattcc
off to a rocking start
Member since August 2022
Posts: 19
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Post by mattcc on Aug 7, 2022 13:40:46 GMT -5
I need to replace the motor on the cabbing machine I bought on craigslist a few weeks ago. It was running extremely hot, and finally burned out. It got so hot that the plug also melted into the receptacle, ruining both. After reading some related threads on this forum, I understand this was likely due to a bad capacitor. (It was an old machine that had sat unused for many years.) Needless to say, it is too late for me to replace the capacitor now. I contacted several motor repair/rewind shops near me and they all told me the cost of rewinding would be greater than the cost of a brand new motor. I know very, very little about electric motors, and because they are quite expensive I am hesitant to purchase anything without some advice. The motor that needs replacing is the one pictured below. It is a Baldor 1/4 HP, single phase,1725 RPM, 115V, dual shaft motor. I have found many good deals on single shaft motors, but the dual shaft ones seem much less common and more expensive. Here are a few questions I have: 1.) Which specifications must I match between the old and replacement motors?
2.) What is the actual difference between motors of the same voltage, rpm, and phase with different horse power ratings? (I understand what HP is, but not how it affects the motor's output.) 3.) Can/Should I use a 3/4 or 1 HP motor instead of 1/4 if I intend to put extensions on the shafts to allow for more grinding wheels? 4.) How can I tell if a motor is waterproof enough to use in a cabbing machine where it is bound to get wet?
5.) Does anyone know where I can find such a motor at a reasonable price either online or in Southern California? I have a budget of $100-$200 USD.
Thanks!
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Post by liveoak on Aug 8, 2022 6:48:07 GMT -5
You might look at Chinese made buffers as a replacement.
Or
That's the cheaper way to go, and they would be as sealed for water no different than the Baldor was.
I assume the Baldor must have sat up on something out of the water tray ?
Alternatively you could make an arbor with pillow block bearings, a shaft & pulley's with a separate motor that you could find surplus somewhere.
It comes down to you have to try and match the Baldor specs, buy a new Baldor
OR be creative & look at the cab unit as a good start on a build.
Patty
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rockbrain
Cave Dweller
Member since January 2022
Posts: 3,033
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Post by rockbrain on Aug 8, 2022 9:17:24 GMT -5
It's going to be very tough to find anything for a reasonable price. Your motor is basically a cab unit minus wheels, hood and trays. It's an easy build for anyone wanting to DIY and there are lots of people wanting to DIY. I see short shafted ones pop up on Craigslist once in a while but they ain't cheap!
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,640
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Post by QuailRiver on Aug 8, 2022 17:47:16 GMT -5
Many years ago I saw a unit with the same type double end arbor that had burned out. And the owner had removed all of the winding and electrical guts from the motor and cut a large square hole in the back of the motor. He added a pulley to the center of the arbor shaft and ran a v-belt though the square hole he had cut in the back of the motor housing to a 1/3hp continuous duty/general purpose motor so that he could continue to use his cabbing unit without having to replace the more expensive double ended arbor motor. He essentially turned his double ended arbor motor into a functioning arbor similar to the Lortone ProMax unit except the belt and motor were to the rear rather than on top.
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quartz
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breakin' rocks in the hot sun
Member since February 2010
Posts: 3,352
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Post by quartz on Aug 9, 2022 0:30:10 GMT -5
Much like what QuailRiver said, I talked with a man working at his Genie at a show. His motor had cooked so he took all the innards out of the case and off the shaft, mounted a belt pulley on the shaft, cut a hole in the back of the motor case for the belt to go through, and mounted a 1/3 hp motor behind.
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Post by catmandewe on Aug 9, 2022 13:47:55 GMT -5
Looks like a first generation Genie, before they adapted them to hold 6 wheels. I have a first generation Genie that is in pretty good condition with wheels and covers on one side and phenolic polish wheels on the other side, I have it listed for sale for $500 but I could come down to $400 for you if it would help. It is in much better condition than the one you have shown.
Let me know if you are interested.
Tony
PS- to replace the motor you have will be around $400
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mattcc
off to a rocking start
Member since August 2022
Posts: 19
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Post by mattcc on Aug 9, 2022 18:06:28 GMT -5
Looks like a first generation Genie, before they adapted them to hold 6 wheels. I have a first generation Genie that is in pretty good condition with wheels and covers on one side and phenolic polish wheels on the other side, I have it listed for sale for $500 but I could come down to $400 for you if it would help. It is in much better condition than the one you have shown. Let me know if you are interested. Tony PS- to replace the motor you have will be around $400 Thank you for the very generous offer Tony. I think I'm going to try converting it to a pulley-driven shaft like a few people mentioned above before I make a larger investment. I'll contact you to see if you still have it available if that does not work out.
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mattcc
off to a rocking start
Member since August 2022
Posts: 19
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Post by mattcc on Aug 9, 2022 18:14:18 GMT -5
Well, QuailRiver , rockbrain , quartz , liveoak , you've all convinced me that it is time to go Dr. Frankenstein-DIY and turn the old motor into a pulley driven arbor. I'll try to remember to take pictures of the process so I can post them. Thank you everyone who replied for all your help!
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rockbrain
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Member since January 2022
Posts: 3,033
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Post by rockbrain on Aug 9, 2022 19:00:42 GMT -5
I don't know if there is a way to check out the bearings, but since it's so old and has other issues, you might want to make sure they're good before you invest any more.
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Post by catmandewe on Aug 9, 2022 20:16:29 GMT -5
Thank you for the very generous offer Tony. I think I'm going to try converting it to a pulley-driven shaft like a few people mentioned above before I make a larger investment. I'll contact you to see if you still have it available if that does not work out. I don't know if there is a way to check out the bearings, but since it's so old and has other issues, you might want to make sure they're good before you invest any more. You will have to pull it out of the bearings to put a pulley on the shaft, so might as well replace the bearings while you have it apart. Tony
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Post by catmandewe on Aug 9, 2022 20:18:42 GMT -5
Come to think of it, if I was doing this one, I would buy a new shaft and bearings that will fit the arbor and allow me to do however many wheels I wanted to do, it would be a one and done deal which would eliminate the need for the adaptors that you were talking about.
Tony
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lyle
off to a rocking start
Member since October 2022
Posts: 9
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Post by lyle on Oct 25, 2022 16:37:55 GMT -5
If it's like any motor I've worked on you'll have to replace the shaft, The rotor on all I've worked on was pretty firmly attached to its shaft. I had the same situation this summer with an older Genie. I bought a Bucktool slow speed grinder from amazon and so far it has worked fine but I'm only using one wheel on each side
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Post by Rockoonz on Oct 25, 2022 23:55:48 GMT -5
I have a feeling quartz and I have seen the same machine. I saw the belt drive Genie at the TV club show or Portland Regional Show in Hillsboro, as I recall, he had cut the back open then cut a v-belt notch right into the original motor windings somehow and it was all still in there with a link belt fished through it. The adaptor shafts is what I like about the genie, the only barrier to having multiple wheel configurations that can easily be switched out is money.
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Post by Rockoonz on Oct 26, 2022 0:00:43 GMT -5
All that said, if it was me I would take Tony up on his offer, by the time you divide $400 minus the price of a motor by the hours to do the job you're pricing your labor around $5 bucks an hour, assuming you have a fairly well equipped shop like I do.
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