From: rijo 
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Subject: Winding Varnish ???
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Date: Fri, 13 Jan 2006 15:21:21 GMT
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    Hi Group , I need to know what type of varnish is used on electrical 
windings . I have several projects that will require varnish coated 
copper wire . Thanks in advance for any good help to my question . Rick

From: "CWatters" 
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Subject: Re: Winding Varnish ???
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"rijo"  wrote in message
news:[email protected]...
>     Hi Group , I need to know what type of varnish is used on electrical
> windings . I have several projects that will require varnish coated
> copper wire . Thanks in advance for any good help to my question . Rick

Google enameled copper wire.



From: "John G" 
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Subject: Re: Winding Varnish ???
Date: Sat, 14 Jan 2006 14:08:34 +1100
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"rijo"  wrote in message 
news:[email protected]...
>    Hi Group , I need to know what type of varnish is used on 
> electrical windings . I have several projects that will require 
> varnish coated copper wire . Thanks in advance for any good help to my 
> question . Rick

You should buy the required type of "Magnet Wire"

Enamelled, Single Cotton Covered, Double Cotton Covered and various 
grades of those and many others.

Try this link and 2 million others at google > Magnet wire
http://www.oz.net/~coilgun/theory/magnetwire.htm


Google is your friend.
-- 
John G

Wot's Your Real Problem?



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From: Yukio YANO 
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rijo wrote:
>    Hi Group , I need to know what type of varnish is used on electrical 
> windings . I have several projects that will require varnish coated 
> copper wire . Thanks in advance for any good help to my question . Rick
The name GLYPTAL comes to mind, used to be a GE subsidary until 1985.
  They specialized in insulating coatings. You might talk to people in 
the motor rewinding business.  Check the Yellow pages for a local shop ! 
they might supply you with 8 oz. from a 5 Gal. Drum !

Yukio YANO

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From: Jasen Betts 
Subject: Re: Winding Varnish ???
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On 2006-01-13, rijo  wrote:


>     Hi Group , I need to know what type of varnish is used on electrical 
> windings . I have several projects that will require varnish coated 
> copper wire . Thanks in advance for any good help to my question . Rick

Most people buy the copper pre-coated. there are a number of different
coatings in use I have no idea what the formulation of any of them is. 

when making connections I have noticed that some need to be scrubbed off 
with fine sandpaper or steel wool while others  will float off if you apply
a slightly loaded solering iron to the end of the wire.

I have also seen some windings have been impregnated with some sort of
varnish-like resin but I don't think that's what you're after, if you are
ask a motor rewinder.

Bye.
   Jasen

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From: John Fields 
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Subject: Re: Winding Varnish ???
Date: Sat, 14 Jan 2006 17:36:59 -0600
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On Fri, 13 Jan 2006 15:21:21 GMT, rijo  wrote:

>    Hi Group , I need to know what type of varnish is used on electrical 
>windings . I have several projects that will require varnish coated 
>copper wire . 

---
http://www.mwswire.com/insspec.htm

-- 
John Fields
Professional Circuit Designer 

From: Bob Penoyer 
Newsgroups: sci.electronics.misc
Subject: Re: Winding Varnish ???
Date: Sat, 14 Jan 2006 20:08:34 -0800
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On Fri, 13 Jan 2006 15:21:21 GMT, rijo  wrote:

>    Hi Group , I need to know what type of varnish is used on electrical 
>windings . I have several projects that will require varnish coated 
>copper wire . Thanks in advance for any good help to my question . Rick

Many (many!) years ago, I worked at a transformer company where we
dipped hot transformer assemblies (heated in an oven) into Formvar.
The Formvar would seep between the hot laminations of the transformer
and cause them to be insulated from one another. That's why commercial
transformer look like they've been dipped in varnish. It's still
available. Google on Formvar.

Once the transformers had cooled in the Formvar bath, they were then
baked again to cure the Formvar.

From: Bob Penoyer 
Newsgroups: sci.electronics.misc
Subject: Re: Winding Varnish ???
Date: Sat, 14 Jan 2006 20:21:28 -0800
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On Sat, 14 Jan 2006 20:08:34 -0800, Bob Penoyer
 wrote:

>On Fri, 13 Jan 2006 15:21:21 GMT, rijo  wrote:
>
>>    Hi Group , I need to know what type of varnish is used on electrical 
>>windings . I have several projects that will require varnish coated 
>>copper wire . Thanks in advance for any good help to my question . Rick
>
>Many (many!) years ago, I worked at a transformer company where we
>dipped hot transformer assemblies (heated in an oven) into Formvar.
>The Formvar would seep between the hot laminations of the transformer
>and cause them to be insulated from one another. That's why commercial
>transformer look like they've been dipped in varnish. It's still
>available. Google on Formvar.
>
>Once the transformers had cooled in the Formvar bath, they were then
>baked again to cure the Formvar.

I should follow up on what I said above. I seem to recall that there
was a vacuum process somewhere along the line. If I had to guess, I
would guess that it was done after dipping the transformer into the
Formvar and before rebaking.

Someone who's still in the transformer business might want to correct
me.

From: "Baxter" 
Newsgroups: sci.electronics.misc
Subject: Re: Winding Varnish ???
Date: Sun, 15 Jan 2006 18:33:50 -0800
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Find a local electric motor rewinding shop.  The varnish they use is
special - it insulates electrically AND it binds the wires into a mass so
they don't vibrate.  Typically, they use several coats, and it is baked
between coats.

-- 
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"rijo"  wrote in message
news:[email protected]...
>     Hi Group , I need to know what type of varnish is used on electrical
> windings . I have several projects that will require varnish coated
> copper wire . Thanks in advance for any good help to my question . Rick