Silicon nitride (Si3N4) ceramic materials are used for all-ceramic bearing rings and rolling elements. The retainer uses polytetrafluoroethylene (PTFE) as the standard configuration. Generally, GRPA66-25, PEEK, PI, and phenolic clamps can also be used. Cloth bakelite tube, etc. Compared with the ZrO2 material made of SiN4 full ceramic bearings, it is suitable for higher speeds and load capacities, as well as higher ambient temperatures. At the same time, it can provide precision ceramic bearings for high-speed, high-precision and high-rigidity spindles, with the highest manufacturing accuracy reaching P4 to UP.
2. Full-fill ball full ceramic bearings
Full-filled ball-type full ceramic bearings have a ball gap on one side. Because of the cage-free design, more ceramic balls can be loaded than the standard structure of the bearing, thereby improving its radial load capacity. In addition, it can avoid the cage material. The limitation can achieve the corrosion resistance and temperature resistance effect of ceramic cage type full ceramic bearings. This series of bearings is not suitable for higher speeds. When installing, pay attention to install the notched surface on the end that does not bear axial load. Because the inner and outer rings of the bearing have ball filling gaps, it is not suitable for applications with large axial loads.
3. Hybrid ceramic ball bearings
Ceramic balls, especially silicon nitride balls, have the characteristics of low density, high hardness, low friction coefficient, anti-magnetism, insulation, wear resistance, self-lubrication, etc., especially suitable for high-speed, high-precision and long-life hybrid ceramic ball bearing rolling elements (The inner and outer rings are metal). Generally, the inner and outer rings are made of bearing steel (GCr15) or stainless steel (316, 304), and ceramic balls can be made of ZrO2, Si3N4 or SiC.
Silicon nitride full ceramic bearings
2020 04/08