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Help choosing the right shaft (axis) on outrunner

Posted: Jan 22 2022 4:13am
by Skippo
I want to pick up a pair of flipsky 6354 battle hardened for my razor e200 while they are on sale for $140.
And I need help to choose the shaft for the sprocket for #25 chain .
There are really not much selection out there other than the type with 2 set screw on a collar.
https://www.ebay.com/itm/133949335159?_ ... %3A2332490

So which one should I get round shaft with keyway or d-axis.
Will one of the set screw be in the keyway slot allow me to position the sprocket to line up with chain?

Please check out the pictures

Also about the motor selection since both 6374 and 6354 are on sale. Which one would be a better choose if I am only going to run it with 36v 30a controller at about 1kw. I weight 200#
Mainly city use no crazy hill climb no off road and no wheelie needed.

Thank you