Randy, kudos on this. One of the best breakdown reviews of servicing an electric motor. I have worked on starters and electric motors for nearly 50 years, and this was a great walk-through! Well played my friend.
Outstanding job Randy! What a beautiful motor, I had to stop your video half way thru so I could score that awesome book on eBay! I got a 1967 copy $10 shipped! Thanks!!!!!!!!
Great job, Randy. It is very obvious that you know a lot about motors, and have worked on a few in your time. As always I have learned a thing or two watching you. Thank You for the course on repairing a Repulsion motor. I don't remember ever taking one apart. Plenty of DC motors, which are similar, but different at the same time. Take Care and Stay Safe. Bob
Hey Randy, don't know how I missed this video. I love working on motors, and am always looking to learn new things about renewing them. Obviously you have worked on many of them. Stay well, the world needs men like you and Lyle.
Learned of your channel from Scoutcrafter and watched a few of your videos. They were so good and informative, I really enjoyed them. So now I am a new subscriber. Thank you.
@@RRINTHESHOP All the used books are sold out. When this video came out there was a good amount of used ones out there. That is what I get for putting it off. I'll have to let some time go by. Goes to show you when you see a good deal jump on it.
Thanks Craig, Morning. I used to have a set I carried from ship to ship but could not find them and had to make some for this motor. Good to have in the box.
I like the way you undercut the mica, I have made 3 vids using my growler. I think I will publish one on fri. I still want to make a vid on undercutting. I am waiting to find an undercutting lathe attachment at an auction.
Great job explaining repulsion-induction motors, commutators and undercutting Randy! Not too many folks around these days that know anything about these motors. Electric Motor Repair by Robert Rosenberg is another handy old book that was first published back in the mid 40's I believe.
For an eighty year old motor she looks amazing. I just bought that book on a used book website $10.14 delivered, It should be here by first week of December. I have a motor that might be as old as yours that needs to be gone through. Thanks for the info Randy. This will help me and give me the confidence to take it on.
Great video Randy very informative and interesting. Sort of reminds me of the old days when we rebuilt VW starters and generators. A much simpler task than what you went thru on this motor. It looks better than new and should last a long time.
Surprised I watched this entire video... Being in a mode, loaded with energy and an itching "commenting finger". Brr, what a job, so time consuming. Easy to do on a 5 pole toy motor, but this motor.... Restoring an old machine brings satisfaction but takes a lot of time. The other option is to use the time for earning money and buy a replacement motor, used or new. Time 08:13... I think Your footage is excellent, really showing what You're talking about. Flint paper? Woodwork stuff? Time 11:50. Good using a respirator. I also use "vision servos" in various shapes... light... Time 12:20. Commutator run out. The higher RPM the more "gymnastics" for the brushes. Likely they will "fly" causing sparks and wear. Intuition was working. You told later. Time 20:.. Wow. A not so heavy motor having such a sophisticated "start up" arrangement. A 220 volt 3 phase motor of that size doesn't have such a start up. I've seen large, much larger, welding inverters calling for a manual action disconnecting the start up commutator. Else it will be burned down... What about the centrifugal affected spring? Its force must be important. Time 23:... Knocking the bearings in place? Doesn't it give shocks to the rest of the bearing? Wouldn't pressing be more safe? Cheers and thanks for the entertainment.
Very interesting video Randy. I think i actually learned something about the internals of a electric motor, which i know very little about. I really love the colors you chose. That motor wasn't that nice when it was new. Something you can be very proud of sir.👍🇺🇸 Roger
Great video Randy. Nice attention to detail on the commutator. Good decision to follow back in the lathe. Would be a painful rebar on that rotor. Lots of resin. Wait we are supposed to have a motor repair book? :)... I did not know about the flint paper. Thank you, Phil
That commutator is nearly worn down to the core by the looks of it, maybe it has much more meat on it? - I don't know if there is a method to rebuild them up again - will have to research! Thanks for sharing, Randy.
Thanks for this video! Appreciate the details of what's inside and how it works. I have this exact motor! It runs a Delta 10" tilt top table saw and 6" jointer combo (1940's). I had the motor re-wound some 30 years ago and it has worked great all these years. But recently, out of the blue, it no longer kicks into full speed. I need to figure out what's wrong.
copper and other 'gummy' metal is where a vertical shear tool is supposed to really shine. You may have to put the tool where it cuts at the very bottom when you are working up to a shoulder, but it's worth that for a tool that will deliver a good finish with a minimum of material removal.
Hey Randy, really enjoyed watching your overhaul. Thanks for the tips. I'm partially restoring (actually just trying to get it to run) a Central Machinery, 1981 vintage drill press and have the motor apart. I need to clean the wiring and internal components of the motor and would like your recommendation for a cleaning agent. I'm fearful that the wasps that had taken up residence inside the motor filled it with more mud than I may be able to remove without further damaging the motor. Thanks for any advice.
There are many commercial cleaning agents which will work. But you can mix a lightly soapy mixture of want and your choice of dish soap. I like Dawn. Get a old tooth brush and lightly wash out the motor. Use sparingly as possible. To do this disassemble the motor, wash the stator then place it in the oven at about 100 deg F. for a couple of hours. After the motor cools back to room temp, do a resistant test of the windings using a OHM meter. Test resistance from each motor lead to the casing of the motor, Should have a very high resistance, 1 to 2 Mohms (1,000,000 ohms) for every 100 volts of operating voltage. Then reassemble motor. Good luck. Thanks for watching.
Hello Randy. This is an off topic question. In the opening scene you were in front of an overhead garage door. Can you say in a short message how you insulated it. Or is that one of those one piece doors that swing up on a hinge arrangement? I need to be insulating my doors too. As for the video it was very well done, and appreciated. More that entertainment it was useful too. Thank you.
The door is a roll up door, I bought it pre insulated. The insulation is a heavy duty foil backed bubble wrap material. About R2 rating but makes a huge difference. I used this material on a sun blasted wall of a hanger and the temp went down 20 deg F inside. Thanks Glenn, take care.
Randy, Thanks for posting this. Great work!! I am going currently restoring a 3/4hp version of this motor. Do you remember the bearing sizes you used when replacing yours?
Yup, also have the same problem with Randy’s videos. Have the speakers cranked to 100% and still straining to hear the dialogue. Thank God Randy doesn’t also play music @ 10X the mic volume every few seconds like some creators do. Can only watch those videos with one hand on the volume knob. Have a used copy of book coming from Amazon. Better hurry if you want one. Randy probably spiked the market with this video. Another great video RR- THANKS!
Randy, Really great video on the RI motor. What is that stand you were using while cutting the mica. We always just laid them on the bench. That looks like a much better setup. Thanks, Rick
Thank you Rick. It is a wheel balance stand, I use it for all sorts of things. I think mine is an armstrong. There are many makers of this type of stand and many sizes. I can do 24" OD.
I've seen it happen with starter motors, but those were D.C. I don't know about A.C. motors. I worked on the starter to my old lincoln D.C. and it started running backwards. Can't remember the details, but I know the position of the brushes had something to do with it. I corrected my mistake with re-assembling it, it has worked ever since.
Yes looks like a tricky thing to replace or repair - but yours has probably a lot of miles left in it, it's maybe not that it'll get as much use as it used to, being a vintage machine - put out to pasture! :)
Hey man, I just picked up one of the jointer/table saw combos that's wired for 230 volt. Do you have a video over wiring it for 150 volt or can you explain how too?
Wow,,brush angle,,,my 1948 delta 14 band saw needs help starting,,,Wala (@@),,,thx,, and lov the DAREx ball cap,,,Randy,,the one I just got in the tool buy out had not manual, and the nname plate is to scratched up to get a model or ser # for. Gold in color, so noting on YT,,can you share a site the mite lead me to a paper or PDF source,,Haven't had time to mount it on the work table, but never used or owned one til now,,,Duel wheel with two holders,,,Bear.
Thanks for watching. Did you acquire a Darex Drill Grinder? Send me a photo of the unit. RRINTHESHOP@GMAIL.com. If it is like mine I some info for you.
Randy, kudos on this. One of the best breakdown reviews of servicing an electric motor. I have worked on starters and electric motors for nearly 50 years, and this was a great walk-through! Well played my friend.
Wow, thanks! I know I did not cover everything but you can only do so much. Thanks Tom.
Outstanding job Randy! What a beautiful motor, I had to stop your video half way thru so I could score that awesome book on eBay! I got a 1967 copy $10 shipped! Thanks!!!!!!!!
Thank you John. Great book for in the shop.
Best tutorial on motor repair I've ever seen ! Excellent !
Wow, thanks!
Great video Randy very helpful and informative.
Thank you Harold.
Great job, Randy. It is very obvious that you know a lot about motors, and have worked on a few in your time. As always I have learned a thing or two watching you. Thank You for the course on repairing a Repulsion motor. I don't remember ever taking one apart. Plenty of DC motors, which are similar, but different at the same time.
Take Care and Stay Safe.
Bob
Thank you Bob.
Hey Randy, don't know how I missed this video. I love working on motors, and am always looking to learn new things about renewing them. Obviously you have worked on many of them. Stay well, the world needs men like you and Lyle.
Thank you Vernon. Yep lots of motors.
Lots of those books on ebay. My copy is on its way 😉👍
Good deal. Great book for the shop. Thanks Tg.
G'day Randy. Nice work on the motor restoration mate. Colours look great too. Cheers, Aaron.
Thank you Aaron.
Learned of your channel from Scoutcrafter and watched a few of your videos. They were so good and informative, I really enjoyed them. So now I am a new subscriber. Thank you.
Awesome, thank you!, John's channel is great.
Great video Randy, it was full of information. Going to pick up the book. Looking forward to the next video.
Thank you Andy. Good Book.
@@RRINTHESHOP All the used books are sold out. When this video came out there was a good amount of used ones out there. That is what I get for putting it off. I'll have to let some time go by. Goes to show you when you see a good deal jump on it.
@@andyZ3500s For sure. I am sure more will show up.
very good video randy
Glad you enjoyed it! Thank you Tr.
Morning Randy! I built one of those tools too. I keep in my tool box and used it alot.
Thanks Craig, Morning. I used to have a set I carried from ship to ship but could not find them and had to make some for this motor. Good to have in the box.
Looks good and sounds great! Can't wait to see the saw under power.
Coming soon! Thanks Greg. Still a few minor finishing touches.
I like the way you undercut the mica, I have made 3 vids using my growler. I think I will publish one on fri.
I still want to make a vid on undercutting. I am waiting to find an undercutting lathe attachment at an auction.
Thank you. yes you should. I will add them to my playlist on the motor.
Don't remember those videos. Definitely gonna find them and watch. Stay well Lyle, the world needs men like you and RR.
Great job explaining repulsion-induction motors, commutators and undercutting Randy! Not too many folks around these days that know anything about these motors. Electric Motor Repair by Robert Rosenberg is another handy old book that was first published back in the mid 40's I believe.
Thanks Bob for the great info on the book. I will have to check that out.
I'm learning so much by your videos. Thanks
Thanks for watching Mark.
Very informative.
thank you Ted.
nice, beautiful job
Thank you Shep.
For an eighty year old motor she looks amazing. I just bought that book on a used book website $10.14 delivered, It should be here by first week of December. I have a motor that might be as old as yours that needs to be gone through. Thanks for the info Randy. This will help me and give me the confidence to take it on.
That is awesome! Thanks Randy. Very good book to have around.
Great video Randy very informative and interesting. Sort of reminds me of the old days when we rebuilt VW starters and generators. A much simpler task than what you went thru on this motor. It looks better than new and should last a long time.
Thank you Jim. No one does that any more.
Surprised I watched this entire video...
Being in a mode, loaded with energy and an itching "commenting finger".
Brr, what a job, so time consuming. Easy to do on a 5 pole toy motor, but this motor....
Restoring an old machine brings satisfaction but takes a lot of time. The other option is to use the time for earning money and buy a replacement motor, used or new.
Time 08:13... I think Your footage is excellent, really showing what You're talking about.
Flint paper? Woodwork stuff?
Time 11:50. Good using a respirator. I also use "vision servos" in various shapes... light...
Time 12:20. Commutator run out. The higher RPM the more "gymnastics" for the brushes. Likely they will "fly" causing sparks and wear. Intuition was working. You told later.
Time 20:.. Wow. A not so heavy motor having such a sophisticated "start up" arrangement. A 220 volt 3 phase motor of that size doesn't have such a start up.
I've seen large, much larger, welding inverters calling for a manual action disconnecting the start up commutator. Else it will be burned down...
What about the centrifugal affected spring? Its force must be important.
Time 23:... Knocking the bearings in place? Doesn't it give shocks to the rest of the bearing? Wouldn't pressing be more safe?
Cheers and thanks for the entertainment.
Very interesting video Randy. I think i actually learned something about the internals of a electric motor, which i know very little about. I really love the colors you chose. That motor wasn't that nice when it was new. Something you can be very proud of sir.👍🇺🇸 Roger
Thank you Roger.
Great video Randy. Nice attention to detail on the commutator. Good decision to follow back in the lathe. Would be a painful rebar on that rotor. Lots of resin. Wait we are supposed to have a motor repair book? :)... I did not know about the flint paper. Thank you, Phil
Wow Phil, you didn't know. I have a couple of other books also. Thank you Phil.
That commutator is nearly worn down to the core by the looks of it, maybe it has much more meat on it? - I don't know if there is a method to rebuild them up again - will have to research! Thanks for sharing, Randy.
I do not know of a method to build them up but they can be replaced. Quite the chore. Thanks you Dudley.
Thanks for this video! Appreciate the details of what's inside and how it works. I have this exact motor! It runs a Delta 10" tilt top table saw and 6" jointer combo (1940's). I had the motor re-wound some 30 years ago and it has worked great all these years. But recently, out of the blue, it no longer kicks into full speed. I need to figure out what's wrong.
Glad it helped
copper and other 'gummy' metal is where a vertical shear tool is supposed to really shine. You may have to put the tool where it cuts at the very bottom when you are working up to a shoulder, but it's worth that for a tool that will deliver a good finish with a minimum of material removal.
Yes they do work on gummy metals for sure. HSS works great also with the proper grind. Thanks Digger.
Hey Randy, really enjoyed watching your overhaul. Thanks for the tips. I'm partially restoring (actually just trying to get it to run) a Central Machinery, 1981 vintage drill press and have the motor apart. I need to clean the wiring and internal components of the motor and would like your recommendation for a cleaning agent. I'm fearful that the wasps that had taken up residence inside the motor filled it with more mud than I may be able to remove without further damaging the motor. Thanks for any advice.
There are many commercial cleaning agents which will work. But you can mix a lightly soapy mixture of want and your choice of dish soap. I like Dawn. Get a old tooth brush and lightly wash out the motor. Use sparingly as possible. To do this disassemble the motor, wash the stator then place it in the oven at about 100 deg F. for a couple of hours. After the motor cools back to room temp, do a resistant test of the windings using a OHM meter. Test resistance from each motor lead to the casing of the motor, Should have a very high resistance, 1 to 2 Mohms (1,000,000 ohms) for every 100 volts of operating voltage. Then reassemble motor. Good luck. Thanks for watching.
Hello Randy. This is an off topic question. In the opening scene you were in front of an overhead garage door. Can you say in a short message how you insulated it. Or is that one of those one piece doors that swing up on a hinge arrangement? I need to be insulating my doors too. As for the video it was very well done, and appreciated. More that entertainment it was useful too. Thank you.
The door is a roll up door, I bought it pre insulated. The insulation is a heavy duty foil backed bubble wrap material. About R2 rating but makes a huge difference. I used this material on a sun blasted wall of a hanger and the temp went down 20 deg F inside. Thanks Glenn, take care.
Randy, Thanks for posting this. Great work!! I am going currently restoring a 3/4hp version of this motor. Do you remember the bearing sizes you used when replacing yours?
Thank you Merry Christmas. Right off no.
Interesting Video RR, would be better if your voice level was up another notch or two. Difficult to turn Volume up but not down.
John, Australia.
Yup, also have the same problem with Randy’s videos. Have the speakers cranked to 100% and still straining to hear the dialogue. Thank God Randy doesn’t also play music @ 10X the mic volume every few seconds like some creators do. Can only watch those videos with one hand on the volume knob. Have a used copy of book coming from Amazon. Better hurry if you want one. Randy probably spiked the market with this video. Another great video RR- THANKS!
It is louder if you were closer.
@@RRINTHESHOP LOL Never thought of that. Might have to move.
Agree. Some more decibel would do good. My rescue is to plug in the mobile ear phone device. Just to remember when dashing away to pick a beer.....
Thank you Brian. I will work on the sound issue.
Randy,
Really great video on the RI motor. What is that stand you were using while cutting the mica. We always just laid them on the bench. That looks like a much better setup.
Thanks,
Rick
Thank you Rick. It is a wheel balance stand, I use it for all sorts of things. I think mine is an armstrong. There are many makers of this type of stand and many sizes. I can do 24" OD.
Sorry , I'm commenting while watching - looks like theres plenty of copper left on it! :)
Yes there still is life in the motor. Thanks Dudley.
Just curious, but is the rotation of the motor changed by indexing the brush assembly in the opposite direction?
I've seen it happen with starter motors, but those were D.C. I don't know about A.C. motors.
I worked on the starter to my old lincoln D.C. and it started running backwards. Can't remember the details, but I know the position of the brushes had something to do with it. I corrected my mistake with re-assembling it, it has worked ever since.
Yes looks like a tricky thing to replace or repair - but yours has probably a lot of miles left in it, it's maybe not that it'll get as much use as it used to, being a vintage machine - put out to pasture! :)
I am sure the motor will last a long time with my son in law. Maybe one day have it rewound. Thank you Dudley.
Hey man, I just picked up one of the jointer/table saw combos that's wired for 230 volt. Do you have a video over wiring it for 150 volt or can you explain how too?
All I am able to tell you is the data plate may have that info, or on the inside of the pot head on the motor.
so randy what was the finnal brush angle?
I did not measure, but I should, Somewhere between 17 and 19 deg is my guess. Thanks Jamie.
Randy i can barely hear your audio on my phone. Maybe try and up your audio volume in the editing.
Roger. Thanks.
Wow,,brush angle,,,my 1948 delta 14 band saw needs help starting,,,Wala (@@),,,thx,, and lov the DAREx ball cap,,,Randy,,the one I just got in the tool buy out had not manual, and the nname plate is to scratched up to get a model or ser # for. Gold in color, so noting on YT,,can you share a site the mite lead me to a paper or PDF source,,Haven't had time to mount it on the work table, but never used or owned one til now,,,Duel wheel with two holders,,,Bear.
Thanks for watching. Did you acquire a Darex Drill Grinder? Send me a photo of the unit. RRINTHESHOP@GMAIL.com. If it is like mine I some info for you.
Just found it a few minutes ago,,its an M1 ser #2107,,got a pdf dw load,, wew,, DAREx discontinued model, but happy to have
Sounds good. DO you still need the pdf? Let me know.
Have the one for model 3's 3-5, and look like my M1 with ser No. 4167-075. The M1 could be a 4,,and really scratched up. Was there ever an M1?
Might be a good idea to put the refurbish date and bearing numbers inside the pecker head so the next guy will know.
Thanks Rollie. I was going to engrave that info on the inside of the cover.
@@RRINTHESHOP Always a step ahead of me.;