High-Quality Metal Materials: Bearing made from chrome steel for durability and resistance; Two steel dust shields to prevent ingress of and foreign matter, high temperature resistance.
Using high-quality G5 grade steel balls,with ultra-fine grinding process, so that the bearing groove friction reduced, improve the precision of rotation, increase flight life.
Excellent Practicability: Ball bearings of this size are ideal for precision work and applications that require a lot of functional mechanical parts in a small space, such as 3D printer, quadcopter or model.