[R-390] Non fitting gears

[Tim Shoppa]

> Does anyone know the specifications for the small springs that hold
> the split gears tight?

My guess is:

Slightly less than 1/8" outside diameter.  Maybe 0.100".
Overall length 3/8".
Wire diameter seems to be 0.020".

In my brief looking around, 0.1" diameter springs made out of 0.020" wire
seem to be fairly common.  But not in a length as short as 3/8".  I'd
hazard a guess that a very workable substitute could be made by buying
a longer spring, cutting it, and bending a new hook on one end.

Probably you want to replace them in pairs.

If you want to wind a spring from scratch, I had this web page pointed
out to me a few days ago.  It makes it look easy!

  http://home.earthlink.net/~bazillion/springs.html

If you're going to make one, I'd make two just to do both side in a
matching pair.

I have bought stock springs etc. from http://www.mscdirect.com/ for
the springs that tension the slug racks down.  (Which are 3/16" OD,
1.5" overall length, 0.020" wire.)

Tim.