ZYS Silicon Nitride (Si3N4) precision ceramic balls 4.5mm with HIP processSi3N4 is a new kind of bearing material with several good features, it possesses high temperature resistance, corrosion resistance, insulation, non-magnetism, high strength, low density and other features. In the application of bearing, it possesses low friction, low temperature rise, high rigidity, low centrifugal force and other features. It can implement high speed, high precision, high temperature, high rigidity, corrosion resistance and other good features.
The high precision and high performance silicon nitride bearing ball is manufactured by spray-drying process, near-net-shape, cold isotatic pressing, GPS-HIP combined sintering, compounded abrasive lapping process effectively. The precision grade of it is G5, the materials class is I.
ZYS Si3N4 ceramic ball material grades
Class
ItemMaterials classIIIIIIPropertyBending strengthσ3.40(Mpa)900800600Crushing load ratio(%)353530Hardness(HV10)158014801380Fracture toughness(Mpa.m1/2)6.05.05.0The limit does of fiber structurePore size(μm)101025Porosity(%)0.020.060.06Crystal phase(μm)101025The second ceramic phase(μm)252525The maximum of inclusion of transverse section every
Square centimeterRange 200(μm)001Range 100~200(μm)012Range 50~100(μm)124Range 20~50(μm)4816
Examples of Si3N4 ceramic ball's common applications
G3G5G10 G16G20 G28 G40Class IHigh speed power equipment
Space mechanism
Aircraft instrumentLiquid oxygen pump
Active shaft bearingThe key parts of aerospace equipment Class IIMolecular turbo-pump
High precision star bearingVacuum equipment, high speed instrument, mechanical devices, high performance and the most advanced contacting spherical propellerMotor, medium-low precision star bearingTesting bearing ball, separating bearing ballClass III Sport, entertainment, food processingMechanical devices ZYS Si3N4 ceramic ball specifications
The nominal diameter of bearing ballThe nominal diameter of bearing ballThe nominal diameter of bearing ballmminmminmmin 1/325 8.73111/320.8 5.5 9.5253/81 5.5567/3211.1127/161.5881/165.95315/6412.30331/642 6 12.71/22.3813/326.351/413.49417/322.5 6.5 14.2889/163 6.74717/6415.08119/323.9695/327 15.8755/84 7.1449/3219.053/44.5 7.5 25.414.7623/167.9385/1631.751 1/4
Note: The special specification can be manufactured after negotiating
ZYS Ceramic ball workshop:
ZYS Glory
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High-performance Bearings Laboratory
State Quality Supervision and Testing Center for Bearing
ISO/TC4 China Secretariat
The Research Center for High-speed Precision Bearing Engineering in Machinery Industry
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