Source for miniature wound springs

[uncletony]

A while back Des used a tiny diameter wound spring for the tachometer cable in his WNW Snipe. I guess that it must be about .5mm OD or maybe even less. Does anybody have a source for these things, preferably US?

--Bo

[Beto]

Have you tried roundwound guitar string? The smallest size available as far as I know is .017, which translates into 0.43mm. See here:

http://www.stringsandbeyond.com/dniwoelsist.html

Your nearest music shop should have them and a single string will be enough for several squadrons. While at it pick also some unwound .008 strings. (0.02mm)

[kornbeef]

Bo.

Have you thought of using metal guitar strings? The spiral wound type.
Heat them to burn out the core so theyre more flexible if needed. I used to use them for valve springs and ribbed hoses in other scales.. Not sure of the smallest dia you can get though.

Keith

Beto posted with better info while I was talking to SWMBO 

[uncletony]

Duh, I have a guitar even. Thanks for the ideas, guys