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Re: Why some Litz wire is difficult to strip
Original poster: "rob by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rob-at-pythonemproject-dot-com>
Tesla list wrote:
> Original poster: "Scott Hanson by way of Terry Fritz
> There are many different types of insulating "varnish" applied to magnet
> depending on the application: temperature requirements, environmental
> bend radius, voltage, processing requirements, polymer type, etc, etc.
> Insulating coatings can be broken down into many different groups. One
> grouping is based on how the wire is stripped for soldering. One group
> (including the very common "Formvar" varnish, Polythermaleze, etc) requires
> mechanical or chemical removal of the coating. Even extended immersion in a
> solder pot with highly activated flux WILL NOT remove this type of
> allow the wire to "tin".
> Other coatings ("Sodereze" "Nyleze", etc) are specifically designed to allow
> tinning in a solder pot. Often this results in somewhat of a trade-off of
> thermal, mechanical, or chemical resistance.
> In my experience, the thickest, toughest, most robust, highest temperature
> insulation will always be the most difficult to strip & tin.
> This probably explains why some users find their wire easy to tin, and others
> find it almost impossible, especially with surplus wire that may not have the
> insulation identified.
> Scott Hanson
I've never had any problems stripping any type of magnet wire. I use a
very hot soldering iron with a big glob of solder. If you get the end
hot enough, the hot flux starts to dissolve the coating. This even
works with large gauge wire if you have a 175W iron like I do. I can't
comment on Litz wire though.
Recently I bought some 26ga teflon insulated wire from Newark. They
have 1000ft spools of 32ga. Sounds like the ultimate for coils. And I'm
sure the silver plating won't hurt either.
The Numeric Python EM Project