best thing i have found for gluing magnets back in is jb weld epoxy. also that grease was mingin, first thing i do on my own motors is to clean off factory grease and apply tungsten grease. it's super high heat resistance and provides low friction due to the tungsten particles.
@@EbikeRepairs Do every magnet need to have the same side-to-side spacing or can I eye ball it? My worry is whether very uneven spacing would impact power and speed.
@@faYte0607 the same is ideal, at 250w it really shouldn't make much difference for a DIY repair - if you have a very important or high power motor I feel it's worth taking it to a motor rebuild shop so they can get it perfect.
@@EbikeRepairs do you have suggestions on removing magnets that were previously glued on if I want to apply epoxy adhesive to all magnets? I've heard that a heat gun is not a good idea. By brute force is probably not a good idea either if they're on there very strong.
That was interesting. Thanks Darsh. I'm surprised they don't manufacture these motors with a mechanical means of holding the magnets against the pull of the coils. As good as they are all chemical bonding will fail with heat and vibration.
I can't see what they would hold it in with unless it was plastic or something not ferrous, but I guess I'm not a design engineer so it's not my job! BAFANG seems to have got it down, never seen one with loose magnets even 15 odd year old motors. However some of the newer 'off brand' ones have failed within a year.
@@EbikeRepairs I imagine the movement that has to be controlled is the in-out movement of the magnets as the coils get energised directly over the magnets and that force will get worse if controller timing is out. Not sure how recessing the magnets into the housing would help if above is the source of the loosening of the magnets? As you point out, not possible for us to solve - we don't make the motors :)
Thanks for all the info in your vids. I increased the speed on my ebike to 28mph it worked one time and after that now it only does about 23 on a flat surface without peddle assist what could be the problem it has two 30amp new fuses
Interesting 🤔 I actually ended up jb welding these magnets back in, but didn't post it because it looked like a dogs dinner and the internet would have eaten me alive 😂 6 months ago - ish. Still going strong.
Just put some superglue around the magnets without removing them. It will drip down and hold them in fine. Done this repair on a couple of motors. Just dont get glue between stator and magnets.
I did end up jb welding them in place! I didn't post it because it looked messy and the comments would have been brutal 😂 working fine 6 months later though.
Who not show is a video of the motor making the noise so others know what the problem may be when they have the same noise? Every video I watch never does a video of the noise
hi. use a deep socket or tube to seat the key.. on axel. never hit the clutch. as you showed.. ok ??
Agreed. A teeny little tippy tap with a hammer 🔨 is needed with a socket still, but distributed evenly.
best thing i have found for gluing magnets back in is jb weld epoxy. also that grease was mingin, first thing i do on my own motors is to clean off factory grease and apply tungsten grease. it's super high heat resistance and provides low friction due to the tungsten particles.
I did just that with JB weld on this motor in the end, thanks!
@@EbikeRepairs Do every magnet need to have the same side-to-side spacing or can I eye ball it? My worry is whether very uneven spacing would impact power and speed.
@@faYte0607 the same is ideal, at 250w it really shouldn't make much difference for a DIY repair - if you have a very important or high power motor I feel it's worth taking it to a motor rebuild shop so they can get it perfect.
@@EbikeRepairs do you have suggestions on removing magnets that were previously glued on if I want to apply epoxy adhesive to all magnets? I've heard that a heat gun is not a good idea. By brute force is probably not a good idea either if they're on there very strong.
Right on! Love your videos!
Glad you like them!
That was interesting. Thanks Darsh.
I'm surprised they don't manufacture these motors with a mechanical means of holding the magnets against the pull of the coils. As good as they are all chemical bonding will fail with heat and vibration.
I can't see what they would hold it in with unless it was plastic or something not ferrous, but I guess I'm not a design engineer so it's not my job! BAFANG seems to have got it down, never seen one with loose magnets even 15 odd year old motors. However some of the newer 'off brand' ones have failed within a year.
@@EbikeRepairs I was thinking aluminium ring top and bottom.
Or just recessed into the housing?
@@EbikeRepairs I imagine the movement that has to be controlled is the in-out movement of the magnets as the coils get energised directly over the magnets and that force will get worse if controller timing is out. Not sure how recessing the magnets into the housing would help if above is the source of the loosening of the magnets? As you point out, not possible for us to solve - we don't make the motors :)
Too true... One day a community designed motor/ open source hub will enter the market, I'm sure.
Thanks for all the info in your vids. I increased the speed on my ebike to 28mph it worked one time and after that now it only does about 23 on a flat surface without peddle assist what could be the problem it has two 30amp new fuses
It's possible that you made the motor a little crispy inside, and now it heat soaks? Is it warm to the touch after 15 mins riding?
I dont know i will have to check thanks@@EbikeRepairs
@@timothyjackson3874
It's possible it overheated and caused your magnets to lose some of their strength
Well done for cleaning your lens 😉 great video 😊🎉
Thank you! 😀
What was the gear size ?
Please tell me the story of your rings! Why so many?
Oh they're ceramic NFC tags to open various doors and gates around the house and workshop! 😁
@ no kidding, learn something new today
@@JoBianco haha yeah they're really handy actually!
@ maybe you should make a video about those
Those rings protect fingers from cutting 😅
Cyc mid drive motors tend to have the same problem.
Interesting 🤔 I actually ended up jb welding these magnets back in, but didn't post it because it looked like a dogs dinner and the internet would have eaten me alive 😂
6 months ago - ish. Still going strong.
@@EbikeRepairs Did you remove outside casing with pulley or did you just push the jb weld down sides without taking casing off?
Just put some superglue around the magnets without removing them. It will drip down and hold them in fine. Done this repair on a couple of motors. Just dont get glue between stator and magnets.
I haven't tried that, ended up job welding them all one by one, what a job!
Hello... Super glue holds? The motor hub heats up, will it be able to handle it?
It will hod fine.@marcelosousa2560
dont take apart any further -- super glue magnets in place - could work ?
I did end up jb welding them in place! I didn't post it because it looked messy and the comments would have been brutal 😂 working fine 6 months later though.
Hey mate I have a fiido d11 and I'm having same issue could I use a 36v himo z20 wheel on instead
If they're all 36v 250w and have the same connector, it will probably run just fine
Are you from UK
Yes 🙌
You said HITWAY... did you mean Himiway? Very different
Ahahah yes! I did a hitway with the same issue at the same time so I clearly got confused 😂
Were you based?
Bexhill, east Sussex www.ebikerepairs.co.uk
Proszę o napisy w języku polskim
I cant sorry
Who not show is a video of the motor making the noise so others know what the problem may be when they have the same noise? Every video I watch never does a video of the noise
@@momo_the_great6969 motor go 'grerrrrrrrrrrbrbrbbrbr'