Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 03-05-2013, 08:17 AM   #1
Member
 
Join Date: Sep 2012
Location: Central Florida
Posts: 146
Rewards Points: 75
Default

Electric Motor Brush


I know this topic is a bit off from the norm for this forum but I was hoping someone could point me in the right direction. I'm in the process of restoring my great grandfather's table saw and cleaned out the old motor. I noticed that one of the brushes had broken off (not sure if I did it or if it was like that already.) I found the broken off piece within the motor housing. Does anyone know where I can find replacement brushes? I've Google'd for over an hour and have been unable to find a "pair" like these. All of them have only one brush, some have a wire coming out much like the wire shown in the pictures. But none of them have two connected by a wire like mine.

If I can't find a replacement, is there anyway to repair the broken brush since I have the piece that broke off?

Thanks.




BrandonD is offline   Reply With Quote
Old 03-05-2013, 08:43 AM   #2
Member
 
SuperJETT's Avatar
 
Join Date: Oct 2012
Location: Loo-uh-vul, KY
Posts: 195
Rewards Points: 150
Default

Electric Motor Brush


Measure one of the good ones and go here http://www.helwigcarbon.com/shop/ search for those dimensions. If needed, you can file a slightly larger one down to fit as long as it slides easily in the brush holder.

Make sure to seat the brushes to the commutator.

SuperJETT is offline   Reply With Quote
The Following User Says Thank You to SuperJETT For This Useful Post:
BrandonD (03-05-2013)
Old 03-05-2013, 09:35 AM   #3
Member
 
Join Date: Sep 2012
Location: Central Florida
Posts: 146
Rewards Points: 75
Default

Electric Motor Brush


Thanks!! I'm at work and don't have the dimensions handy but I'm hopeful -- I've already seen a couple pairs like mine just browsing what they have. If I have to file them down, will a simple metal file work?
BrandonD is offline   Reply With Quote
Old 03-05-2013, 02:19 PM   #4
Member
 
Join Date: Jun 2007
Posts: 3,510
Rewards Points: 2,008
Default

Electric Motor Brush


If you have the specs from the motor, you can order them that way. But measure them anyway to be sure. If the motor is not to old, you should be able to get an exact replacement. Buy all four and replace all four. Not just one.

Check the commutator to be sure its okay also.
J. V. is offline   Reply With Quote
The Following User Says Thank You to J. V. For This Useful Post:
BrandonD (03-05-2013)
Old 03-05-2013, 04:20 PM   #5
Member
 
Join Date: Sep 2012
Location: Central Florida
Posts: 146
Rewards Points: 75
Default

Electric Motor Brush


It is a Brown-Brockmeyer Co 3/4HP 1750RPM motor. As best as I can tell they are no longer around.

I measured one of the good ones and came to a thickness of 1/4", a width of 1/2" and a length of about 7/8". The way it's setup I most flexible with my length. Closest brushes I could find (that come in a pair):
http://www.helwigcarbon.com/shop/item.asp?itemid=4844 (correct thickness, 5/8" width... can I file off an 1/8th of an inch with a metal file from its entire length?)
http://www.helwigcarbon.com/shop/item.asp?itemid=4877 (same as first one but longer)
BrandonD is offline   Reply With Quote
Old 03-05-2013, 04:23 PM   #6
Member
 
SuperJETT's Avatar
 
Join Date: Oct 2012
Location: Loo-uh-vul, KY
Posts: 195
Rewards Points: 150
Default

Electric Motor Brush


They are just carbon, file or sand away.
SuperJETT is offline   Reply With Quote
Old 03-05-2013, 04:39 PM   #7
Member
 
Join Date: Sep 2012
Location: Central Florida
Posts: 146
Rewards Points: 75
Default

Electric Motor Brush


Thanks. Bought two, will report back once I have them in and the motor wired up again.
BrandonD is offline   Reply With Quote
Old 03-14-2013, 08:16 AM   #8
Member
 
Join Date: Sep 2012
Location: Central Florida
Posts: 146
Rewards Points: 75
Default

Electric Motor Brush


Update: brushes arrived, sanded down and in the motor. Wired it back up last night and it's running great. Thanks again.
BrandonD is offline   Reply With Quote
The Following User Says Thank You to BrandonD For This Useful Post:
jbfan (03-14-2013)
Old 03-14-2013, 08:17 AM   #9
Member
 
SuperJETT's Avatar
 
Join Date: Oct 2012
Location: Loo-uh-vul, KY
Posts: 195
Rewards Points: 150
Default

Electric Motor Brush


Excellent.

SuperJETT is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
electric versus propane water heater Jeremy Hillary Boob, PhD Appliances 7 01-30-2012 06:23 PM
90 amp electric car charger! The future... Billy_Bob Electrical 16 02-16-2010 03:01 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.