Cleaning / Polishing / Dressing Of An Electric Motor Commutator #Repair #DIY #HowTo

Today we show you a way to clean and polish the commutator of an electric motor. The electric motor seen in the video belongs to an electric drill I have found in a crate with its motor opened. I do not know what has caused the grooves on the commutator but they need to be removed for the motor to work properly.

► YOU WILL NEED
- Cleaning rag
- Sponge
- 400 or better, 600 grit Sand paper (aluminium oxide)
- Cleaning gear: Brush / air compressor / vacuum cleaner

► DISCLAIMER
Always make sure you operate in a safe and secure manner.
For this project, take your time, work slowly and check progress.
It is essential to thoroughly clean the motor after polishing the commutator since fine metallic particles left may create shorts in the engine.

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▼ CONNECT!
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▼ MUSIC
► "Instant Love of the Cralito Noodle" by the LabOtomy
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╚╗╔╣╚╝║═╣║║═║╚╣║╠╗╔╣║║╚╝╠╗╔╝
═║║║╔╗║═╣╚╣╦║║║║║║║║║║╠╣║║║═
═╚╝╚╝╚╩═╩═╩╩╩═╩═╝╚╝╚═╩╝╚╝╚╝═

[slomac]

You just saved my ass!! Thought my PTT motor was bad. They are discontinued and was about to drop $500 on a USED replacement motor. Then I watched this video and saw some details that I over looked on my initial rebuild. Broke the motor down again and did everything you taught. Installed it back on the boat and bam💥. I had a better working motor then ever. Thank you so much for this insight! Keep it up!

[krislink]

If you stick it in a drill press or lathe, the process goes faster and the finish quality is much better as well

[MalaRhynn]

Thank you for the video! I bought a used compressor which has been soaeking, and its sort of my project to leaen about motor maintainance now. All in all youre helping me keep this purchase of mine well and worth it!

[georget]

Great video. I am going to reassemble and try it out. I might need to replace brushes, as well. Thanks for the education.

[habibithebro]

i subscribed and just left your longest playlist on autoplay. going to buy some supplies. you just saved me 600$. my central vacuum stopped working and this will get it fixe!

[mattjones]

Very good! I use a soap stone most of the time and use an air compressor or shop vac to get rid of excess dust.

[ehhhh]

Needed to learn this because the online support for my mini grinder told me to clean the carbon brush, the setting 1 and 2 wouldn't work

[georgedennison]

When you use abrasive on the commutator, stay away from metal based abrasive, particles can embed in the soft copper & damage the brushes.

Use a fine stone or fine grit carborundum sand paper; most paper backed wood sandpaper is carborundum, but watch out for aluminum oxide.

I generally clean/scrape/undercut the mica between the segments before turning or polishing the commutator.

Unless you have a commutator undercutting machine, (if you did, you wouldn't be watching this vid), & undercutting by hand, it is very easy to slip & scratch the commutator.

A wood pick will clean the muck out, but if you get down to the mica, it'll take a steel tool to scrape the groove deep enough.

If you do the between the segment work first, your slips & scratches can be cleaned up as you turn & polish or polish the comm.

Go slow & be careful, tearing up the bare copper insulation or breaking a comm lead will hose the armature.

[gambiarrautil]

Hello! My 775 DC motor works and after a while it stops. Could this be dirt in the Commutator? I checked other components and everything seems to be normal.

[yabonjin]

So WHAT PROBLEMS DOES THIS CONDITION CAUSE? Does the burnishing and grooves cause any reduction in performance of my motor? Does it lead to any failures??? Why should we care?

[mountriscan]

Γεια χαρἀ..να σε ρωτἠσω αγαπητἐ..ο μετατροπέας επισκευἀζεται αν ἐχει ριξει αντισταση η χαλασμενες καλωδιωσεις στις μπαρες
??

[marke]

After about 2 minutes of running the motor with the new brushes the commutator is going to look exactly like it did before.

[KevKovac]

Which grit sandpaper do you use? I'm trying to fix my vacuum cleaner motor.

[habibithebro]

you showed that you checked the carbon brushes against it. how do i know its good or it needs replacement?

[scolopede]

I'm more dangerous. I plug motors into a variac, use electrical cleaner and q-tips as the rotor turns at a slower speed until the copper shines, doesn't take long.

[sergiodallagiovanna]

Salve amici....
se lo si mette sul tornio...
con la carta viene benessimo...
Se c'è molto scalino va fatto tornire da uno bravo tornitore con utensile adeguato.... poi smicato e poi carta vera sottilissima per lucidatura.

Chiaro che dipende che tipo di lavoro uno vuol fare!

[markwilliams]

Great Video and thanks for sharing.I recently replaced the brushes on my B and Q Angle Grinder .I had to wait 6 weeks to get them from China .The only place to get replacements ! I cleaned up the commutator as per your demo.However in use there is some Arcing in the Brush area.Do you think the Brushes need time to bed in ? As far as I can tell they are moving freely.Thank you again,

[youngplayboy]

I was wondering... 2:17 What if I fill that gap with the help hard glue. Because that method work for only for 1 or 2 months and than cummutator goes fail.

[bobbyhutcherson]

those grooves are put there on purpose.

[Mhakan]

Makinenin çalışmasına engel midir. Siyahlıklar