fizzit wrote:I'll try to get the motor apart soon to look at it. It does, in fact, still turn. I think I have the same problem as swbluto did with his 63-74, which is why I don't think the shaft is bent, instead the bearing is just messed up (rotated out of the seats, as you said). That and the fact that the motor still revs up fine without vibration.!
recumpence wrote: I am using a large grinder while spinning the sprocket on the lathe to narrow it.
fizzit wrote: Time to start ebaying random crap I have laying around!
AussieJester wrote:recumpence wrote: I am using a large grinder while spinning the sprocket on the lathe to narrow it.
ah ba ya whaaat!?! Recumpence goes "ghetto" well i neverfizzit wrote: Time to start ebaying random crap I have laying around!
I am sorry to be the one to tell you fizzit, but you are showing all the signs of e-bike addiction :: nods head::
Soon you will buying e-bike components instead of food, which is, incidentally ...the real reason behind weight lose in e-bike owners ;-P
Seriously best of luck with the build and as Matt says it is "its still a relatively rare/exotic hobby." and
you have dived straight in, kudos to you and best of luck with getting it all together
fizzit wrote:Hmmm... what to do???
Hillhater, are you saying that the bearing flange will bend between the bearing and the bolt or the bolt threads will strip? Because that's the only way I can really see it flexing, barring the spacers deforming. The chain loads will be completely pulling towards one of the bolts on one side and away from that bolt on the other, the only reason the bearings are rotated 45 degrees on the mockup is because I countersunk the wrong side the first time I drilled the bolt holes
AJ, I wish it were that easy! The pictures don't show it, but the tube is oval shaped
fizzit wrote:Does anyone have any idea how I can get a 11-or-so-tooth bike chain sprocket onto a .5" shaft? I'm open for any ideas, even for having someone machine another #40 sprocket for me. however, I want to keep it under $25 if I can, and with that budget I think machining is out
dequinox wrote:Lol not bad looking for a dull hack saw. I think it will work! The idea behind the sandwich plate, though, is that you bring it down far enough to mount the other bearing to. Cut a hole in it for the motor...or just leave a corner off or something like that.
dequinox wrote:$9.60 at McMaster-Carr: http://www.mcmaster.com/#drive-sprockets/=9jxfxz
or $13.44 if you want hardened teeth. I don't know what shipping is... but they even have 9 tooth sprockets for a 1/2" shaft.
Miles wrote:#40 chain has the same pitch & roller dia. as bicycle chain but it is much wider.
Dimensions here: http://www.gizmology.net/sprockets.htm
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