Lathe Motor Help

[Jud96]

Long story short, the Rockwell 11x25 lathe I bought secondhand came with a motor that was supposed to be single phase 220, but upon investigation the previous owner wired it up with a 110 plug and has some sketchy wiring going on. On top of that, there's no tag on the motor so I realistically have no idea what the motor is. All of that to say, I need help finding a suitable replacement motor that will work with my lathe and not require more work than necessary to get it running. I'll be honest and say I know little to nothing about electrical work and electric motors. I will have qualified help with wiring everything up, but I have to find a motor first. I do know that the original motor for this lathe was a 1HP 66 frame size motor and 3 phase. I'm debating whether to do a single phase 220 motor or to keep it 3 phase and run a VFD. I also want to know if I can go up or down in frame size and still use my original belts and pulleys. The lathe with be used primarily for chambering and gunsmithing, no heavy machining. Any help and guidance is very appreciated. Thanks!

 

[matthias]

Its hard to tell you the best course of action over the internet. But this is what I have done for my machines at different times.

Got a good used motor from a local repair shop that only does electric motors.

Found a farmer with 20 motors for sale and bought all of them for $15 each then sorted the good from the bad at home.

Went on ebay and paid through the nose for shipping.

Went to a thrift store and bought a wood working tool that had a motor that would work and removed it sold the rest of the tool.

Hope this helps and is not too much of a rant

 

[markT]

I would suggest a wood workers forum. I joined NC woodworkers and guys were helpful with my planer issue. Although someone here might reply. Never no.

 

[ebb]

Take the motor you have with you to the motor shop and see if they can tell you what it is and if it is capable of running the lathe. If the old motor is unacceptable, you are at the right place to find one that is.

 

[LVLAaron]

Show us the wiring.

But like ebb said... a motor shop can figure it out pretty easily.

 

[paperpuncher]

I am sending you a pm with some contact info Good chance this guy can help you out

 

[Old Navy]

Show us the wiring.

But like ebb said... a motor shop can figure it out pretty easily.

No name plate on the motor?

 

[BigBolt]

Long story short, the Rockwell 11x25 lathe I bought secondhand came with a motor that was supposed to be single phase 220, but upon investigation the previous owner wired it up with a 110 plug and has some sketchy wiring going on. On top of that, there's no tag on the motor so I realistically have no idea what the motor is. All of that to say, I need help finding a suitable replacement motor that will work with my lathe and not require more work than necessary to get it running. I'll be honest and say I know little to nothing about electrical work and electric motors. I will have qualified help with wiring everything up, but I have to find a motor first. I do know that the original motor for this lathe was a 1HP 66 frame size motor and 3 phase. I'm debating whether to do a single phase 220 motor or to keep it 3 phase and run a VFD. I also want to know if I can go up or down in frame size and still use my original belts and pulleys. The lathe with be used primarily for chambering and gunsmithing, no heavy machining. Any help and guidance is very appreciated. Thanks!

Here is a company I use all the time they have a butt load of NEMA 66 Frame motors both single and 3 phase.

https://www.grainger.com/content/general-catalog?gucid=N:N:PS:Paid:MS:CSM-2296:8DK268:20500731&gclid=89dca0376d66137c2ef3c5aad60a30bc&gclsrc=3p.ds&msclkid=89dca0376d66137c2ef3c5aad60a30bc

 

[Walt Krafft]

A motor shop will be your friend.

 

[Jud96]

Here is a company I use all the time they have a butt load of NEMA 66 Frame motors both single and 3 phase.

https://www.grainger.com/content/ge...p.ds&msclkid=89dca0376d66137c2ef3c5aad60a30bc

I looked on there, I may be overlooking it, but I don't see any NEMA 66 Frame motors on there. Thanks.

 

[Steve morgan]

Long story short, the Rockwell 11x25 lathe I bought secondhand came with a motor that was supposed to be single phase 220, but upon investigation the previous owner wired it up with a 110 plug and has some sketchy wiring going on. On top of that, there's no tag on the motor so I realistically have no idea what the motor is. All of that to say, I need help finding a suitable replacement motor that will work with my lathe and not require more work than necessary to get it running. I'll be honest and say I know little to nothing about electrical work and electric motors. I will have qualified help with wiring everything up, but I have to find a motor first. I do know that the original motor for this lathe was a 1HP 66 frame size motor and 3 phase. I'm debating whether to do a single phase 220 motor or to keep it 3 phase and run a VFD. I also want to know if I can go up or down in frame size and still use my original belts and pulleys. The lathe with be used primarily for chambering and gunsmithing, no heavy machining. Any help and guidance is very appreciated. Thanks!

I would use a 3 ph & vfd. You will thank me later.

 

[ebb]

Grainger is for sure the easy button but quite possibly the most expensive way to go. My boss insisted i use them if the big mixer was down and the crew was going home if I could not get it running. And Grainger has so many locations they will store to store if not across the nation the same day. If you use a used motor or the one you have get the motor shop to change the capacitor with a new one while you are there. My Powermatic 66 has failed to run 2 times since new in the 80s and it was a capacitor both times. Wish you were close we found a guy in Belle Glade that does big pumps for the farms and he is good.

 

[DRK]

Long story short, the Rockwell 11x25 lathe I bought secondhand came with a motor that was supposed to be single phase 220, but upon investigation the previous owner wired it up with a 110 plug and has some sketchy wiring going on. On top of that, there's no tag on the motor so I realistically have no idea what the motor is. All of that to say, I need help finding a suitable replacement motor that will work with my lathe and not require more work than necessary to get it running. I'll be honest and say I know little to nothing about electrical work and electric motors. I will have qualified help with wiring everything up, but I have to find a motor first. I do know that the original motor for this lathe was a 1HP 66 frame size motor and 3 phase. I'm debating whether to do a single phase 220 motor or to keep it 3 phase and run a VFD. I also want to know if I can go up or down in frame size and still use my original belts and pulleys. The lathe with be used primarily for chambering and gunsmithing, no heavy machining. Any help and guidance is very appreciated. Thanks!

Where are you in MI?

 

[urbanrifleman]

I looked on there, I may be overlooking it, but I don't see any NEMA 66 Frame motors on there. Thanks.

Take the motor to a local motor repair shop. Ask them. They will suggest a replacement.

 

[Sniperhandle]

I would find a compatible 3 phase motor and wire in a VFD, There are so many benefits from a better surface finish to Variable speeds and braking. It's really not that hard to do, The main thing you will have to do is find a compatible pulley depending on the shaft size of your old motor, If its a single belt pulley, I have had good luck finding them at Tractor supply and they are cheap too. A 2hp 3 phase motor will actually have more torque than a 2hp single phase motor.

 

[dryhumor]

Link to motor dimensions by frame. You can measure what you have and see what’s close, if it has been discontinued you may end up with a different shaft size requiring a different pulley, which leads to different belts. Motor protection might need upgrade, or may work, depending. Maybe a new mounting point depending on the footprint of the motor.

Best bet is a motor repair shop. Or a mechanical contractor that does industrial pumps. They can source a motor with the contacts they have. New motors are pricey, try to find a rebuilt one or have yours rebuilt.

Lead times may still be stupid on a new motor.

Electrical Motors - Frame Dimensions

Electrical motors NEMA frame dimensions.

www.engineeringtoolbox.com

 

[Sniperhandle]

Check with "Surplus Center" to see if they have a compatible motor. I got lucky and took a chance on a 3 phase motor for my die filer that I pulled out of a bin at the scrap yard, Nothing wrong with it and it had a local government institution's inventory bar code sticker on it.

I think I paid .50 or .60 cents a pound for the motor and it was like 15 or 16 dollars. I spun it over and checked for any burnt smells and it seemed to be something they just quit using for one reason or another.

Surplus Center

Warehouse distributor for many top name manufacturers. Parker Hydraulics, Hypro Pumps, Prince Hydraulics. Direct from the factory. Surplus equipment. We buy large quantities of manufacturer's surplus or excess stock.

www.surpluscenter.com

lansing for sale "3 phase motor" - craigslist

lansing for sale "3 phase motor" - craigslist

lansing.craigslist.org

 

[akajun]

go three phase and vfd.

quality 3ph 1hp 1750rpm motors are cheap and plentiful. check ebay, surplus center, automation direct, etc. not only will you get fingertip speed control, youll get a smoother surface finish as well. should be able to find one for less than 200.

for the vfd, hitachi. prob about 150-200 bucks.

other options are to find a cheap or free used treadmill and adapt the vdc motor to it. 100% torque at all rpms.

trying to get a single phase motor rebuilt is pointless, they are so cheap now nobody does it unless its some special purpose motor.

 

[urbanrifleman]

go three phase and vfd.

quality 3ph 1hp 1750rpm motors are cheap and plentiful. check ebay, surplus center, automation direct, etc. not only will you get fingertip speed control, youll get a smoother surface finish as well. should be able to find one for less than 200.

for the vfd, hitachi. prob about 150-200 bucks.

other options are to find a cheap or free used treadmill and adapt the vdc motor to it. 100% torque at all rpms.

trying to get a single phase motor rebuilt is pointless, they are so cheap now nobody does it unless its some special purpose motor.

OK I'll bite. Why would you get a "smoother finish"?

 

[Sniperhandle]

A single phase motor's power is pulsating, Wherein a 3 phase motor's power is smooth. And the single phase pulsating power is translated into the surface finish.