On Wed, 07 Nov 2012 08:22:31 +0000, Charlie+ wrote:

On Tue, 06 Nov 2012 22:57:02 -0500, Splork wrote as
underneath my scribble :

Crack on the left is the original, the gear has been running eccentric
some time, wear on the right teeth is considerable, if you do a repair
pay considerable attention to concentric-icity(!!) to the centre. Is
the equipment worth it? A dirty repair might be to use hot glue for
thin metal or fibre washers in the rebates... try first to see if hot
glue will stick to the soft gear material, might have to abrade.

http://users.rcn.com/healer//Gear1.jpg
http://users.rcn.com/healer//Gear1a.jpg


That's the word I was looking for yesterday. Concentric.

This is a pencil sharpener.
When I reach to use it and it is gone . . . Yeah, worth it.

The only repair that I think worthwhile, which is potentially long lasting, is
on each piece, to place 2 holes halfway between hub and teeth, 3 holes on the
largest, to allow jb weld (Strong metal bearing epoxy) to join obverse and
reverse of the gear (2 operations). Once sandwiched between the "weld", being
restrained and driven by the pins that form through the holes, I can place the
gear on the drive shaft and greasing the gear end to prevent adhesion, make a
third gluing operation for a strong tight fit around the shaft end.

So the cracks will not be repaired, but the pins/vias that form in the holes
will keep it together, sandwiched between plates which prevent it from
divergence in any axis. The 3 segments held and driven separately.

Now if laziness prevails........ :-)