(1)deep groove ball bearings (for the technical level: P4, P5, P6, P0)
Deep groove ball bearings, the most representative of the rolling bearing, a wide range of uses, affordable two-way axial and radial load capacity. Suitable for high-speed rotation and low noise, low-vibration forum steel bearings or not the application of heat, cold, corrosion, magnetic field, [...]

Leonardo da Vinci has been credited with the discovery of the principle behind the mechanics of ball bearings.
The first patent was awarded to Jules Suriray, a Parisian bicycle mechanic, on 3rd August 1869. The bearings were then fitted to the winning bicycle ridden by James Moore in the world’s first bicycle road race, Paris-Rouen, in [...]