Outrunner motor balancing rings
thingiverse
If your multirotor's cheap motors are not as balanced as you'd like, consider adding one of these balancing rings. Designed to redistribute weight to either side, they come in two sizes: 35mm and 28mm motors. To minimize vibration, rotate them until balance is achieved and secure with cyanoacrilate glue. Scale the pieces to fit your motor snugly, using a tight press fit as a guide. If more or less weight is needed, adjust the ring's "Z" dimension accordingly. Two non-eccentric rings are also included for motors that require no balancing, ensuring all motors look uniform.
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