Tom: BAD IDEA!
Glue shouldnt really be used in robots other than antweights
if you want to attach the gear directly to the wheel, then put 4 bolts through the gear and into the wheel hub. Just make sure they are lined up before you do so
As David said, glue isnt gonna cut it in featherweights for that sort of application. You need something more robust.
If the shaft is too thin to drill through (and by the sounds of it, it is) then you can still put a grub screw through the boss of the gear/sprocket. Id use two (at 90 to each other) to help lock it in place. You could also continue drilling through to the shaft, but only far enough to make a little dimple in the shaft, which would give the grub screws an extra bit of grip.
Cant guarantee that itll be devoid of slipping, especially if the forces going through the drive system are large, but it should do the job. Its how I will be attaching the pulleys to my 6mm weapon motor shafts.
OkGlue was a last resort!
If I drill through the boss for a grub screw, how do I thread the hole?
use a tap
http://en.wikipedia.org/wiki/Tap_and_diehttp://en.wikipedia.org/wiki/Tap_and_die
How good a fit on the shaft is the gear? and how much torque is going through it.
Green loctite actually works VERY well for attaching pinions to a shaft, just leave it 24hours to set and you should be fine for most featherweights.
Ah ok. The bore is 6mm, same as the shaft, so its not loose or tight.
I suppose the loctite is worth a try at least!
Thanks for everybodys help.
Ive recently done that on a much smaller motor and tried to remove the gear (which was a loose fit before). I had to cut the gear in half to get it off
Loctite 603
Trev
put a ball bearing over your hole in gear hit it with a hammer which will make it smaller then press it on with loctite as well better to weld it tho
Ah good idea! Ill have to find a ball bearing though. Probably got one somewhere.
Now, Loctite 603 or Green Loctite?
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