Zirconia Bearings

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Our unique brand of zirconia (ZrO2 or zirconium dioxide) bearings are stabilised with yttrium oxide to provide increased toughness, strength, and resistance to fractures. However, their coefficient thermal expansion is comparable to that of stainless steel. This enables both the bearing and the mechanical system to expand and contract at similar rates, making it ideal for high-temperature applications. Our bearing engineers can support fits and tolerances during the bearing application engineering design phase.


As with other ceramic bearings, our zirconia range performs well in both high and low temperatures They are non-magnetic, non-conductive, and have corrosion-resistant properties. Although they react poorly to prolonged contact with steam or hot water, and do not perform well in hydrofluoric acid, zirconia bearings are particularly suited to offshore applications.


Available in all popular metric and imperial sizes, order UNASIS-brand zirconia bearings today. Many varieties are available from stock and on competitive delivery times, and we offer deep groove ball bearings, angular contact, self-aligning, roller, and custom designs upon request.

Product Details

Colour Ivory
Density 6.05 g/cm3
Linear expansion coefficient 7.0 µm/m°C
Hardness 1300Kg/mm2
Elastic modulus 1300 GPa
Poisson’s Ratio 0.31
Electrical Resistance 1013Ωcm


UNASIS Bearings has a vast network of distributors to reach all corners of the globe. No matter where you are, you will get the best service to go along with the best bearings.

Contact Us Today

For more information, please call us today on +44 (0) 1235 527 770 or email [email protected]

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