On Mon, 16 Mar 2009 13:19:57 -0600, msg wrote:

I needed to repair an Exabyte 8505 8mm tape drive which had a broken 14 tooth
approx 3/8 inch diameter nylon gear in the cartridge handling mechanism, and
lacking suitable spares, I decided to attempt to reform the gear; this post
describes the method and results.

Gear sizes are standardized. It would be easier to find the raw
spur gear stock and re-machine the bore and length to suit your
purpose. Check the "Machinery's Handbook" for sizes.