for sure agree with both of you. ive asked her to try again pressing the 52x40x7 bearing under the monster bearing she’s banging in with the hammer. I have no idea what goes on at that place considering. maybe its a good test. for me getting an appropriately sized bearing with what would amount to something like .005mm interference ideally is rare and expensive to find. . Retaining fluid is often recommended. But woke up at 5am and told her to NOT cut them all (hopefully!) to the wider 52.00 with tolerance +.02 that was what it was supposed to be. So I want an interference fit, and I want it on the housing side first and possibly even the shaft with the obstacle then being assembling: pressing the two bearings at the same time, so pressing the stator into the rotor yea I’d like to get some liquid nitrogen and shrink them solid and working that way but given having put together the old the retaining fluid is pretty versatile though and as long as not too hot it lasts. a squirt on interference fit and the ultimate in smooth silence. but some people ride bare with the tight slide fit even on the aluminum motors and the rattle is pretty minor. interesting to see no one told me of their aluminum shaft being worn down and I’m still riding the oldest blue goo aluminum just to try to kill them and the shafts haven’t shown to wear while riding( I don’t open them to look because that design sucks to open and close, more glue and huge effort sometimes.) I guessed the cheap 6000 aluminum would’ve worn down but don’t know the forces that would be on that 20mm x 7mm aluminum shaft. Doing 30mph with a 200lbs rider on a mediocre road and than smacking a pot hole or something, can you guess/math the forces or maybe put a sensor on something?
steel now though buddies and syched.
(the shafts on the sample were a tight press fit and its a wild ride getting these parts made at a reasonable price even with the supposed to be tolerance of -.02mm .)