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What a good idea, I never though of making a thread this way. Thanks for the tip.

you could also wrap some plastic wrap around the threads & form some epoxy putty around it to make a cap,

I found the file and have sent him a mail. Thank you for the tip! -- Lars H

I would be most grateful? if you will have a look at your scrap motor -? if the caps are ok I would like to buy them. Yes, I am swedish and live in south Sweden. Tack Magnus! -- Lars H

My thoughts are much the same. With the clearance mentioned in one of the other emails a very slight misalignment could cause your symptoms. You may be able to rotate an end plate in 90 degree steps.

Dave is it possible to rotate the end plates of the motor?? If so try to rotate one 180 degrees and see if the shaft spins more freely.The binding of the shaft could be just a misalignment of the

So I got it running really well and spent some of the day putting it all together. Here is a picture. A few more loose ends to tie up and I will be ready to make something. Thanks to everyone who

There is some play laterally along the rotor. When I spin it by hand you can feel it dragging in the bushings. I should be able to spin it by hand and it keep going but it isn’t that loose. I am

Thanks for information. I will pull the bushings and soak in some hot oil for a while. They looked pretty clean. I took some micrometer readings and and I am amazed at how tight the clearances are

As has been suggested, these are probably Porite bearings. Ideally you should use the special oil for these. If you have a business that is local and repairs sewing machines they may have this oil for

Hi David, let let preface by saying that my experience is informed by having rebuilt the U90 motor. I’m only speaking to the motor bushings/bearings. I’m pretty sure the bushings you’re

I would never put any abrasive on the bushings, they are probably oillite bushings made of sintered bronze which has lots of pores to hold oil and you will not be able to clean out? the abrasive. If

I have a scrap motor, I can look if they are any good. Are you in Sweden (I am). You name seem Swedish.? / Magnus? Skickat fr?n Yahoo Mail p? Android P? m?n, apr. 2020 klockan 8:52,

So I got the little motor running. It is a little tight in the bushings though. I know that the rotor should be very loose and able to spin easily by hand. I can spin it but it is not as free as an

Oh, I get it. I (as well as Neil) thought "coal" was a misspelling of "coil". When actually it was a mistaken form of "carbon". Back to the question.Several years ago, someone posted a source for

It is one of the black bakelite/plastic caps for the motor brushes. Maybe someone have one from a scrap motor? -- Lars H

Generally those tool sets have? some top rake on them for turning steel. or maybe aluminium. For brass you need zerotop rake - a plain flat top to the tool. With top rake the tool tends to dig in,

Never use emery cloth or emery boards on these. They leave bits behind that aren't good for motors. Neil -----

Inside is mother's milk to me. I used to repair stuff like this half a century ago. And I'll even tackle a flat screen TV - if it's not too heavy! Neil -----

Hard to believe it's already been three weeks again! :O Just wanted to let you guys know that I got it running again - right direction on first try too! I think my little "vent" hole might have been