I did a stupid thing... I have this style of rear hub motor. Has 500w stamped on it but I see same motor being sold as 500-1500w usually. Been using it for 9 000km - 2 years without any problems (bought it used, not sure how much it did before but it was nearly new).
I wanted to upgrade phase wires since they are very very thin so I went to open up the motor. I took the freewheel side cover off with relative ease. Actually almost too easy, bearing should bite a bit stronger to the axle than that in my opinion (bearing stayed in housing at least). I've removed stator along with 1 cover still attached out of rotor. Since hall and phase wires are on the disc side I had to try and take other cover off. Didn't seem like it will go as easy as other side. I don't have puller of correct size so I've put a nut on the axle, mounted stator / housing in the vice so that housing's edge is on the flat but stator can move freely and gave axle a couple of whacks. Axle or bearing didn't budge even the slightest and since the bearings / axle has virtually no free play and still seem good, I decided wires are good enough for now and gave up on the idea.
I've cleaned, greased and sealed up motor with a bit of RTV since it had quite bit of rust on the stator / magnets. I've replaced rim, spokes (12 to 14 gauge) and freewheel with new DNP 7-speed 11-28T since the 14T was too short.
Upon wheel building I noticed motor itself is wobbling a bit. I managed to get the new rim trued almost perfectly, but the motor itself is wobbling along with the freewheel and disc of course. It's not insane amount but it's more than it should. It's enough to move the chain back and forth a bit. It's very obvious if I spin motor full speed in the air along with whole bike shaking. I am 95% sure it didn't wobble before.
My question is, what is more likely to be bent on these, axle or housing? The thing is, visually axle looks straight and if i spin axle alone, there is no signs of it being bent and when I do so there is no jumping of freewheel or anything (I can spin it very slow though). Axle is 14mm. Housing is alu but seems pretty strong. Honestly, both seem to be pretty tough and those couple of punches that didn't even move a bearing don't seem like it would be enough to bend anything. Otherwise it would've surely bent on some of the jumps of the curb or over nasty holes I had. So I'm a bit puzzled here. Anyone's thoughts?
I wanted to upgrade phase wires since they are very very thin so I went to open up the motor. I took the freewheel side cover off with relative ease. Actually almost too easy, bearing should bite a bit stronger to the axle than that in my opinion (bearing stayed in housing at least). I've removed stator along with 1 cover still attached out of rotor. Since hall and phase wires are on the disc side I had to try and take other cover off. Didn't seem like it will go as easy as other side. I don't have puller of correct size so I've put a nut on the axle, mounted stator / housing in the vice so that housing's edge is on the flat but stator can move freely and gave axle a couple of whacks. Axle or bearing didn't budge even the slightest and since the bearings / axle has virtually no free play and still seem good, I decided wires are good enough for now and gave up on the idea.
I've cleaned, greased and sealed up motor with a bit of RTV since it had quite bit of rust on the stator / magnets. I've replaced rim, spokes (12 to 14 gauge) and freewheel with new DNP 7-speed 11-28T since the 14T was too short.
Upon wheel building I noticed motor itself is wobbling a bit. I managed to get the new rim trued almost perfectly, but the motor itself is wobbling along with the freewheel and disc of course. It's not insane amount but it's more than it should. It's enough to move the chain back and forth a bit. It's very obvious if I spin motor full speed in the air along with whole bike shaking. I am 95% sure it didn't wobble before.
My question is, what is more likely to be bent on these, axle or housing? The thing is, visually axle looks straight and if i spin axle alone, there is no signs of it being bent and when I do so there is no jumping of freewheel or anything (I can spin it very slow though). Axle is 14mm. Housing is alu but seems pretty strong. Honestly, both seem to be pretty tough and those couple of punches that didn't even move a bearing don't seem like it would be enough to bend anything. Otherwise it would've surely bent on some of the jumps of the curb or over nasty holes I had. So I'm a bit puzzled here. Anyone's thoughts?