BBS-02 Motor shaft won’t come off

[winiemo]

Hey today, I tried removing the motor shaft, but as seen in the picture it does not come out, it even pulled it self out of the motor. You can even wobble it… so I tried to push it with a screw driver, unluckily braking a little part of one magnet. Anyhow it’s now still working just as before , but has anyone experienced this before? Just wanted to lube the nylon gear as it starts squeaking under full load when warm. The motor it self only run 100km which is sad, as im sure it will eat/ crumble up that broken magnet with in a couple of weeks

 

[amberwolf]

Doesn't it have a circlip on the other end of that shaft? (should be disassembly pics in one of the BBS02 threads)

 

[winiemo]

i was searching for something like this, but the otherside of the shaft just ends in an aluminum block and all the videos i watch disassembling the motor, didnt show that.

 

[amberwolf]

Hmm. Then I don't know why it wouldn't come out, if it's just a shaft in a block, no bearing, bushing, circlip, or other retention mechanism.

 

[aae34]

There is a small bearing. I've visited my bbs02 nylon gear twice(changed it once - just because i was there) w/o any issues.

 

[winiemo]

Ok, so that’s what I think as well, so the bearing on the side of the motor was greased, might it be that they glued the wrong bearing by mistake? Against this would be , that you shouldn’t be able to wobble a glued Bearing

 

[aae34]

Quality Bearing Kit - Bafang BBS01 and BBS02 - Full Set - Lekkie

Lekkie's Bafang Bearing kit includes internal bearings for Bafang's BBS01 and BBS02 mid drive motors.

lekkie.tech

The smallest bearing in the pic of above kit is at the other end of that motor shaft, fwiw..
Mine had no glue.

 

[winiemo]

How can it not come out then? Makes me crazy... any advices on how to get it out? As you see, its that strong connected, the magnets even came off... the nylon gear shouldnt be the point at all?

 

[aae34]

How can it not come out then? Makes me crazy... any advices on how to get it out? As you see, its that strong connected, the magnets even came off... the nylon gear shouldnt be the point at all?

Have a look at this, and the thread linked in the post:

Rattling issue BBS02B

I've had a knocking/rattling noise from my BBS02B for a while and have talked to the reseller who has been less than helpful unfortunately. I've disassembled the motor and thr bottom rotor bearing seems fine and came off still attached to the rotor. The top shaft that connects to the nylon gears...

endless-sphere.com

 

[winiemo]

After 100km it would be crazy, if my shaft would be eaten up like the one in the photo, but seems like the only solution i can think of right now. It should be easy to pull the shaft "threw" the nylon gear right? No wiggling or what so ever?

 

[aae34]

Pretty sure i didn't have to wiggle it, or anything, but then i had taken off the axle pedals are on, so pinion was "free".
iirc., the nylon gear has a bearing, which does act kind of like a freewheel for the pinion.

 

[winiemo]

Yes, I also took out the axle with its big gear , so that the pinion gear was free to spin.

 

[hillslayer@]

Wonder if the factory started gluing the shaft to the bearing to prevent wear.

 

[winiemo]

I could not move the bearing on the motor side from the shaft, by filmy pulling. Didn’t tried it harder because i didn’t want to damage the bearing.