China Neodymium And Ferrite Magnets Manufacturer & Supplier 
If the magnetic ring of the motor is too loose, it may affect the performance and running stability of the motor, if the magnetic ring of the motor is too loose, you need to take some measures to solve the problem, the following are some possible ways, I hope it will be helpful to you.
1、Refix the magnetic ring
Use proper tools and techniques to refasten or glue the loose magnetic ring, this may require disassembling the motor and carefully reinstalling the magnetic ring to ensure that it is properly positioned and secured in its location.
2. Add support or padding
Add support or padding around the magnetic ring to provide additional support and stability. This can be accomplished by adding shims, padding material, or other support structures to reduce the looseness of the magnetic ring.
The picture below shows a six-pole magnetized ring ferrite
3、Replacement of Magnetic Rings
If the magnetic ring has been severely damaged or loosened beyond repair, it is best to consider replacing the ring with a new one, making sure that replacement parts of the proper size and quality are used to ensure the performance and safety of the motor.
Regardless of which approach is taken, care must be taken when dealing with loose magnetic rings in motors to ensure that they do not damage the motor or pose other safety risks. If you are unsure how to adjust the magnetic rings, it is recommended that you consult the motor manufacturer or a professional technician for advice.
Selection of motor magnetic ring type;