Si3 N4 ceramic bearing and bearing ball
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ceramic ball bearing
Si3 N4 ceramic bearing ball possess high density, low specific gravity, high strength, hardness and toughness, excellent wear and corrosion resistance, low thermal expansion, heat and electricity insulation, and thermal stability.
the bearings made of those balls possess the following characters:
1 the hybrid ceramic ball bearing possess high temperature , cold and grinding resistance, magnetoelectricity resistance and insulation, self-lubricate without oil and high-speed rotation properties etc. . it is high-technical new materials and can be operated under extremely wicked environment and special situation and can be applied in aviation, spaceflight, navigate, petroleum industry, chemical plant, auto plant, electron facility, metallurgy, electric power, weave, pump, medical treatment instrument, scientific research and military affairs fields.
Meanwhile, it can also reduce the rotational slide between the rolling element and the raceway surface and thus prevent surface damage. Therefore, ceramic ball bearing is the best choice for high-speed rotation application, such as high-speed motor spindle bearing, machine spindle bearing, dental drill bearing, high-speed wheelhead bearing, instrument bearing and hard drive bearing. It can also be used in civilian products like roller skate, aeromodelling and electric toy.
2 the bearing holding party of the hybrid ceramic ball bearing is made of bearing steel (Gcr15) , stainless steel (9cr18) , nylon 66, poly-four fluorin ethane, silicon nitride (Si3N4) and zirconia, and the ceramic ball and bearing rings are mainly made of silicon nitride (Si3N4) which is of excellent overall properties and has become the preferred material for ceramic ball bearing.
3 the density of Si3N4 ceramic is 3.20g/cm3, much lower than that of bearing steel (7.85g/cm3) . For this reason, the ceramic rolling element can effectively restrain the centrifugal force generated by high-speed rotation and reduce the load of rolling element.