I guess I mistyped-- the spring is 4mm long, not 4". I have the
wire size at work, and I am currently at hole, but obviously it is
very small, to make a 2mm OD spring. So, just get some fine steel
wire and wind it up-- is that really all there is to it?
Yes, basically that's all there is to it.
I once had to repair an old silver cigarette case where a little
spring had broken. It was a special spring that certainly could no
longer be purchased, so I had to make it. It too was basically a 2mm
OD coil spring, about 10mm long. I made it from 0.45mm stainless
steel wire, wound on a 0.8mm former (actually the shank of a little
drill), and it worked fine after a few abortive attempts to get the
angled ends correctly orientated.
The biggest problem was in sourcing a short length of hard stainless
Coil springs can be used in, essentially, three ways: tension,
compression, and rotation. In my case, the spring was designed to be
If yours is for tension, just wind the coils next to each other,
form the eyes at each end, and you're done.
If it's for compression, wind as for tension, then stretch it until
it retains a "set" (ie. the coils remain separated), then put it back
on the former and compress it as far as it will go. This will ensure
that you can never compress it past its yield point again. Then cut
it to the required length and dress the ends on a grind stone.
Regards, Gary Wooding