On Wed, 22 Jul 2009 10:20:20 -0500, the infamous "Karl Townsend"
scrawled the following:


"Bob Engelhardt" wrote in message
...
How much torque is involved? Makes a huge difference.

1/2 hp. servo. I think this is at 3000 rpm. Torque*rpm* factor= hp. Don't
remember factor off hand.

Really quick & easy, and easy to undo (unlike silver solder): a tack of
weld on the end, bridging the shaft & sprocket. Quick & Dirty (tm).

Don't like this idea.

Roll pin or taper pin. If high torque. Whilst drilling for a pin, I
assure the alignment by doing the tack weld above & drilling both at once.

Bob

May try a roll pin if adhesive bonding don't work.

If both the shaft and gear hub are soft enough, could you drill and
tap a couple split holes in the end of the shaft/side of gear, where
the screw would engage both? It would give you a key of sorts and
hold the gear in place at the end of the shaft. Maybe add Loctite.

--
Mistrust the man who finds everything good, the man who finds everything
evil, and still more the man who is indifferent to everything.
-- Johann K. Lavater