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04-18-2022, 03:48 PM | #1 |
Junior Member
Join Date: Mar 2018
Location: Livonia, Michigan
Posts: 23
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Stewart Warner Horn Brushes?
I’ve identified my horn as a Stewart Warner. It is missing one of the brush holders and the brush inside it. Are the brushes and brush holders sold by Mike’s, Snyders, etc generic enough to use? I notice Mikes says theirs are for a Sparton horn but they don’t have others called out for other brands of horn. Snyders also offers only one variety of brushes and they look just like what Mikes offers. The tension bus bar (as Mikes calls it) doesn’t look like what the pictures I have of a SW either. I also need to change the mounting screw for the brush holder. Can I just use them anyway and mount with a different screw?
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04-18-2022, 09:30 PM | #2 |
Senior Member
Join Date: May 2010
Location: La Mesa Ca
Posts: 1,168
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Re: Stewart Warner Horn Brushes?
I can't answer your question but when working on a SW horn you need to remember that the nut on the end of the armature that holds the vibrator disc on is LEFT HAND threads!
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04-19-2022, 04:36 PM | #3 |
Senior Member
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,453
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Re: Stewart Warner Horn Brushes?
They are close enough that they could be made to work. I made brushes from small electric motors the first time I repaired one.
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04-19-2022, 06:11 PM | #4 |
Senior Member
Join Date: May 2012
Location: Fredericksburg, Virginia
Posts: 774
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Re: Stewart Warner Horn Brushes?
I can't help with the brush holder. But I have a variety of small brushes that came out of a motor shop. If you can provide the brush dimensions and a photo of a brush. I'll see if I can match it.
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04-20-2022, 10:49 AM | #5 |
Senior Member
Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 5,047
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Re: Stewart Warner Horn Brushes?
When replacing brushes with other than the proper ones make sure the composition is the same as, or close to the composition of the originals. "Not all brushes are made equal".
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If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn! Last edited by katy; 04-21-2022 at 09:54 AM. Reason: Addition |
04-20-2022, 09:33 PM | #6 |
Junior Member
Join Date: Mar 2018
Location: Livonia, Michigan
Posts: 23
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Re: Stewart Warner Horn Brushes?
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04-20-2022, 09:37 PM | #7 |
Junior Member
Join Date: Mar 2018
Location: Livonia, Michigan
Posts: 23
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Re: Stewart Warner Horn Brushes?
This is what I have
Last edited by dmengel; 12-30-2022 at 10:45 PM. |
04-21-2022, 01:12 AM | #8 |
Senior Member
Join Date: Dec 2018
Location: Berlin / Germany
Posts: 182
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Re: Stewart Warner Horn Brushes?
I would build this holder myself. A piece of brass square tubing cut to length. A brass nut is soldered to one end (hard soldering if necessary), the slots are filed to the other end... The cable can also be better soldered to brass. An old brush filed to fit, a spring and screw will be found...
This shouldn't be great art. It's not all about beauty here. The function is crucial. Greetings Andy |
04-21-2022, 09:35 AM | #9 |
Senior Member
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,453
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Re: Stewart Warner Horn Brushes?
To me, it makes sense to use available parts even if they have to be modified to work properly. Of the five different types, they are all very similar in construction and some even have interchangeable piece parts. The width and thickness of motor frames vary but armature & fields are very similar. Only one make used bushings on the armature shaft but it is the rarest make of the five. The hardware is about the same for all makes and some of it interchanges between makes.
If you set them all next to each other, it's hard to tell them apart. |
04-21-2022, 11:46 AM | #10 |
Senior Member
Join Date: May 2010
Location: Pinckney, Mich.
Posts: 174
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Re: Stewart Warner Horn Brushes?
I am trying to restore a Sparton horn and need to rewire the coils and the wire is about
19 or 20 gage copper with a real thin insulation on it. Does anyone know where that wire can be purchased ? Thank you !! |
04-21-2022, 08:22 PM | #11 |
Senior Member
Join Date: May 2010
Location: Auburn Washington
Posts: 2,552
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Re: Stewart Warner Horn Brushes?
dmengel i sent you a PM
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04-22-2022, 09:07 AM | #12 |
Senior Member
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,453
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Re: Stewart Warner Horn Brushes?
Look for magnet wire that is pre-coated with varnish.
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04-22-2022, 10:08 AM | #13 |
Senior Member
Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 5,047
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Re: Stewart Warner Horn Brushes?
An electric motor rewind shop, if you can find one.
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