Matronics Email Lists :: View topic - Any ideas where to get electric motor brushes?

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Any ideas where to get electric motor brushes?

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

rparigoris

Joined: 24 Nov 2009
Posts: 791

Posted: Sun Jan 03, 2021 8:43 pm Post subject: Any ideas where to get electric motor brushes?

Hi Group

I need some brushes for the exciter on my Monarch EE lathe. Was making some aeroplane parts and it quit.

Sizes needed:

3/8" x 3/8" and worn out length is 1.060", it has a shunt and terminal (need 4, will buy eight)

1/2" x 1/4" and worn out length is .495", it has a shunt and terminal (need 2, will buy four)

Any ideas where I can purchase from?

Thanks

Ron P.

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

JB Soar

Joined: 19 Apr 2019
Posts: 20

Posted: Mon Jan 04, 2021 9:38 am Post subject: Any ideas where to get electric motor brushes?

McMaster-Carr has a nice selection of brushes available.



On Mon, Jan 4, 2021 at 11:29 AM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:



 	  Quote: 	
		    At 10:43 PM 1/3/2021, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>



 Hi Group

 I need some brushes for the exciter on my Monarch EE lathe. Was making some aeroplane parts and it quit.

 Sizes needed:

 3/8" x 3/8" and worn out length is 1.060", it has a shunt and terminal (need 4, will buy 

 1/2" x 1/4" and worn out length is .495", it has a shunt and terminal (need 2, will buy 4)

 Any ideas where I can purchase from?

 	


    About 40 years ago I had ready access to

    a stockroom of brushes that would probably

    have yielded something that would cut-down

    to suitable profiles. Alas, no more.



    There are listings on eBay (40,000+) that

    might produce useful candidates but most

    come out of China . . . so it depends on your

    urgency.



    I've cut down many a brush on a mill. In

    your case, avoid brushes destined for use

    in h9gh current, intermittent motors like

    starter and winch motors.



    There are hundreds of 'recipes' for brush

    make-up . . . unless you order spares from

    the original manufacturer of you motor,

    finding an exact replacement for size and

    content is problematic.



    However, for anything less then high duty

    cycle applications, optimization of recipe

    will have little significance on service

    life of your substitution.



    You might research DC motor overhaul

    services on the 'net. They may have

    spares suitable for modification if not

    okay as-is. Keep your old springs if they're

    not obviously compromised.



    1" is pretty long for a worn brush . . . 1/2"

    values are quite common. Is that in a 4-pole

    motor? What are the nameplate sizes for these

    motors?



 



 

 

   Bob . . .



   Un impeachable logic: George Carlin asked, "If black boxes

   survive crashes, why don't they make the whole airplane

   out of that stuff?"

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Ceengland

Joined: 11 Oct 2020
Posts: 386
Location: MS

Posted: Mon Jan 04, 2021 9:54 am Post subject: Any ideas where to get electric motor brushes?

Have you tried Monarch?

On Mon, Jan 4, 2021 at 11:43 AM John B <jbsoar(at)gmail.com (jbsoar(at)gmail.com)> wrote:



 	  Quote: 	
		  McMaster-Carr has a nice selection of brushes available.



On Mon, Jan 4, 2021 at 11:29 AM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:



 	  Quote: 	
		    At 10:43 PM 1/3/2021, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>



 Hi Group

 I need some brushes for the exciter on my Monarch EE lathe. Was making some aeroplane parts and it quit.

 Sizes needed:

 3/8" x 3/8" and worn out length is 1.060", it has a shunt and terminal (need 4, will buy 

 1/2" x 1/4" and worn out length is .495", it has a shunt and terminal (need 2, will buy 4)

 Any ideas where I can purchase from?

 	


    About 40 years ago I had ready access to

    a stockroom of brushes that would probably

    have yielded something that would cut-down

    to suitable profiles. Alas, no more.



    There are listings on eBay (40,000+) that

    might produce useful candidates but most

    come out of China . . . so it depends on your

    urgency.



    I've cut down many a brush on a mill. In

    your case, avoid brushes destined for use

    in h9gh current, intermittent motors like

    starter and winch motors.



    There are hundreds of 'recipes' for brush

    make-up . . . unless you order spares from

    the original manufacturer of you motor,

    finding an exact replacement for size and

    content is problematic.



    However, for anything less then high duty

    cycle applications, optimization of recipe

    will have little significance on service

    life of your substitution.



    You might research DC motor overhaul

    services on the 'net. They may have

    spares suitable for modification if not

    okay as-is. Keep your old springs if they're

    not obviously compromised.



    1" is pretty long for a worn brush . . . 1/2"

    values are quite common. Is that in a 4-pole

    motor? What are the nameplate sizes for these

    motors?



 



 

 

   Bob . . .



   Un impeachable logic: George Carlin asked, "If black boxes

   survive crashes, why don't they make the whole airplane

   out of that stuff?"

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Charlie

ventura(at)brandeis.edu
Guest

Posted: Mon Jan 04, 2021 10:25 am Post subject: Any ideas where to get electric motor brushes?

There is a small one man shop near work who's main business for the last 35 years has been  repairing and rebuilding electric motors, generators, and alternators.  Whenever I need brushes, I go to him.  If it is automotive, he looks it up and sells me what I need.  If it is not automotive, I bring him the brushes, and/or the device and he has always been able to come up with a replacement from his stocks.   He told me that brushes come in different hardnesses.  Hard brushes will last a long time, but wear the slip ring or commutator faster, so you may be in for a ring turning or replacement eventually.  Softer brushes don't last as long, and need replacement more often, but you will get more ring life out of your device with them.  I usually go softer, since it is much easier to replace several sets of brushes than dismantle a motor and turn or replace the commutator once. 



My local Home depot also carries a selection of brushes, but you may have to surreptitiously scratch them to get an idea of their hardness. The salesmen have no idea.  Some large hardware stores also carry a selection of brushes.  If they don't have exactly what you need, they can be filed or milled to fit.

--Joel

On Sun, Jan 3, 2021 at 11:52 PM rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote:



 	  Quote: 	
		  --> AeroElectric-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>

 

 Hi Group

 I need some brushes for the exciter on my Monarch EE lathe. Was making some aeroplane parts and it quit.

 Sizes needed:

 3/8" x 3/8" and worn out length is 1.060", it has a shunt and terminal (need 4, will buy 

 1/2" x 1/4" and worn out length is .495", it has a shunt and terminal (need 2, will buy 4)

 Any ideas where I can purchase from?

 Thanks

 Ron P.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=499971#499971

 

 

 

 

 

 

 ===========

  -

 Electric-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

 ===========

  FORUMS -

 eferrer" target="_blank">http://forums.matronics.com

 ===========

 WIKI -

 errer" target="_blank">http://wiki.matronics.com

 ===========

 b Site -

           -Matt Dralle, List Admin.

 rel="noreferrer" target="_blank">http://www.matronics.com/contribution

 ===========

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum