Originally Posted by
SAP_2000
Agreed about manufacturers using JP because of price even there are known issues with brake and retract controller and obviously the brakes design.
But there is nonphysical contact here, so tell me how could anything be wearing out?
The physical contact is from magnetic case and the pieces of metal in inner radius of the wheel(you can see the wearing in your wheel picture)
The pieces of metal will be pulled down to direct contact with the case when magnetic is activated.The friction between metal is not good compare to brake material that is used in automobile.(All air brake use automobile brake material and it works very good in any speed.)