Bearing model: MR117ZZ / MR117-2RS

Bearing size: inner diameter * outer diameter * width = 7*11*3 (mm)

Bearing material: bearing steel (special steel for bearings, code GCr15)

Quality grade: The quality grades of our bearings mainly include ordinary grade, motor grade, and boutique grade.

1. Ordinary level: the basic level of the national standard. The dimensional accuracy is less than ±0.05mm, and the speed is less than 500rpm, which is suitable for low-speed and low-demand environments. Such as: low-speed transmission equipment, casters, strollers, toy cars, etc.

2. Motor level: above the national standard P0Z2 level. The dimensional accuracy is less than ±0.01mm, the hand feel is smooth, the speed is less than 6000rpm, the noise is low, and the service life is long. Suitable for motors, toy models, automobiles, power tools, pneumatic tools, telecommunication equipment, fitness equipment, sports equipment, etc.

3. Premium grade: above the national standard P6 level. The dimensional accuracy is less than ±0.005mm [can be imported instead], the hand feel is smooth, the speed is greater than 6000rpm, the noise is low, and the service life is long. It is suitable for high-speed motors, high-speed models, instrumentation, precision equipment, high-end toys and other fields with high requirements.