In article ,
mm wrote:

==Alternatively, what you use to glue a a broken white plastic (or
nylon?) gear to a metal shaft? The gear is in two pieces, and when I
put half of it in place, and rotate the shaft it's a tight fit between
it and each of the gears it mates with.

It's time for a new gear.

http://www.sdp-si.com/estore/CoverPg/Gears.htm