... MagnetApplication: Damper actuator / Gear boxWeight: Approx. 50g Basic Structure of Chengfang Motors2-pole statorSr ferrite permanent magnet3, 5, 7, 8 ... knurls, D-cut, stepped shaftShaft-mounted gears, eccentric gears, belt pulleysStainless steel (SS304, SS420) shaftBall bearingCage-brush commutating systemPrecious metal ... with low noise motor,low rmp motor,used for copy machine and hair dryer motor