[TheForge] Motor brushes

[rsmuck]

I have cut down larger brushes to fit your application!!
Rowland of Roseburg, OR 97470
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----- Original Message ----- 
From: "Bob Willman" <blcksmth at wcnet.org>
To: "'Sponsored by ABANA'" <theforge at mailman.qth.net>
Sent: Sunday, April 01, 2007 3:48 PM
Subject: RE: [TheForge] Motor brushes


> I suspect that the wires are molded/cast with the carbon material in
> a mold.
>
>
> Bob Willman
> Bowling Green, Ohio
> The Eagle's Anvil
> WB8NQW
>
> -----Original Message-----
> From: theforge-bounces at mailman.qth.net
> [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Bruce Freeman
> Sent: Sunday, April 01, 2007 6:44 PM
> To: Sponsored by ABANA
> Subject: RE: [TheForge] Motor brushes
>
> I've seen some brushes that contain no wire.  If it can make friction
> contact with the armiture, it can make friction contact with line voltage.
> Usually there's a spring to make the actual contact, IIRC.
>
> However, I just pulled a brush out of a throwaway angle grinder and found
> that it is an assembly:  A carbon brush with a wire soldered to a thin 
> metal
> disk, the wire surrounded by a spring.  Interestingly, the wire comes out 
> of
> a hole in the carbon brush.  How is it attached?  No evidence of solder.
>
> So, I asked myself how I would construct this.  I don't know if solder 
> would
> stick to a carbon brush, and I doubt it.  However, drill a hole maybe 1/4 
> in
> deep, insert wire, and  pack hole with lead  wool and I bet you'd have a
> working brush.  Might want to dip the lead wool in vinegar first to give 
> it
> a clean surface.  Maybe some other packing would work as well.
> In a pinch, I might try very fine steel wool, also cleaned first.  I can't
> say these ideas would work, as I've never tried them.
>
> Bruce
> NJ
> --- Dan Brewer <danqualman at gmail.com> wrote:
>
>> The wire is part of the brush.
>>
>> You will need to find new brushes.
>>
>> Dan in Auburn
>>
>> -----Original Message-----
>> From: theforge-bounces at mailman.qth.net
>> [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Lynn and Susan
>> Lang
>> Sent: Sunday, April 01, 2007 2:53 PM
>> To: theforge at mailman.qth.net
>> Subject: [TheForge] Motor brushes
>>
>> Hello
>> How does the brush manufacturer connect the fine copper wire to the
>> carbon brush?
>> I have repaired the forge blower motor brush, soldering the wire back
>> onto the brush, do not know if a good fix or not. Am in pursuit of a
>> new pair of brushes.
>>
>> It appears that maybe copper flakes are embedded into the end of the
>> brush, or it could just be copper from the wire that I pulled out...
>>
>> Or is a different repair method better?
>>
>> Thank you
>> lynn
>>
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