Ceramic Roller /bearings

Ceramic Roller /bearings

RRP: USD $40

The full ceramic ball bearings listed below are supplied with rings and balls made from zirconium dioxide (ZrO2). These zirconia bearings are available as full complement (no cage) or with cages made from PTFE, PEEK or 316 stainless steel. 


 These are non magnetic, non-conductive and highly corrosion resistant to most chemicals although ZrO2 bearings are not recommended for prolonged contact with steam. Full complement bearings or those with a 316 stainless cage can be used up to 400°C while bearings with a PEEK or PTFE cage can cope with temperatures of up to 250°C. For temperatures below -70°C, PTFE or 316 stainless steel cages are preferred. 


Standard radial clearance for full ceramic bearings is C0 but other clearances can be supplied to order. ZrO2 ceramic bearings are generally used for their extreme temperature capabilities, excellent corrosion resistance or non-magnetic properties. Other sizes can be supplied on request.

XY Ceramic Property
TypeUnitZirconium
XY GradeZ-100Z-200Z-300ZM-100ZB-100
MaterialZrO2-Y2O3ZrO2-Y2O3ZrO2-Y2O3ZrO2-MgOZrO2-Y2O3
colourwhitewhitewhiteyellowblue
Densityg/cm366.036.045.626.03
Flexural Strength Mpa900105012004501100
Compressive StrengthMpa21002200230016002300
Modules of ElasticityGpa200210220210220
Fracture ToughnessMPam1/26785.57
Poision's Ratio0.30.30.30.30.3
Hardness HRAHRA8990908890
Vickers HardnessHV112501450145012401450
Thermal Expansion Coefficient10-6K-11110101010
Thermal ConductivityW/mk33333
Thermal Shock Resistance△T.℃400400400400
Maximum Use Temperature
in Oxidizing Atmosphere
1000100010008501000
Max Use Temperature
in Reducing or Inert Atmosphere
1000100010008501000
Volume Resistivity at 20℃Ωcm10^1310^1210^125X10^1310^12
Dielectric StrengthkV/mm1915171917