|
Matronics Email Lists Web Forum Interface to the Matronics Email Lists
|
View previous topic :: View next topic |
Author |
Message |
rparigoris
Joined: 24 Nov 2009 Posts: 796
|
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 |
|
|
|
Back to top |
|
|
JB Soar
Joined: 19 Apr 2019 Posts: 22
|
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 |
|
|
|
Back to top |
|
|
Ceengland
Joined: 11 Oct 2020 Posts: 391 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 |
|
Back to top |
|
|
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 |
|
|
|
Back to top |
|
|
|
|
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
|
Powered by phpBB © 2001, 2005 phpBB Group
|