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  1. R

    Demagnetize parts close to magneto-elastic sensor in mid drive motor

    Thank you for answer!
  2. R

    Demagnetize parts close to magneto-elastic sensor in mid drive motor

    Hello. I need to demagnetize certain parts inside a mid-drive e-bike motor. The parts that need to be completely neutral are the crankshaft, torque tube, spring, ratchet, and drive cog. Inside the motor, there’s a magneto-elastic sensor that’s not functioning correctly. The most likely cause...
  3. R

    Low friction rotary shaft seal for middrive ebike motor

    It’s not the same issue, though. In the problem I described, water isn’t entering through the bearings but rather through a shaft seal that I need to replace. I’ve already taken the necessary steps to protect the bearings; I even replaced the old ones with improved versions that have rubber...
  4. R

    Low friction rotary shaft seal for middrive ebike motor

    Chinese manufacturer suggested adding graphite. Thats why I created this post. To gather information about materials and the design.
  5. R

    Low friction rotary shaft seal for middrive ebike motor

    No, it is not oil-filled. There are two major issues with applying grease. First, the location of this part within the motor makes it very difficult to service, which is why a maintenance-free solution is needed. The other issue is the presence of self-lubricating bushings between the shaft and...
  6. R

    Low friction rotary shaft seal for middrive ebike motor

    I was thinking about modding ptfe lip seal like this one. I think they are used in air compressors. I did a lot of effort trying to figure out what would work best. Unfortunately I don't have knowledge about seals specially in automotive applications when minimal friction and no grease is needed...
  7. R

    Low friction rotary shaft seal for middrive ebike motor

    Hello, I'm currently working on fixing my Bosch Gen 4 mid-drive motor and need a new rotary shaft seal with very low friction that doesn’t require grease. Standard materials like NBR or FKM aren’t suitable because they have a relatively high friction coefficient when running dry. There is an...

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