Ceramic Bearings

SPEKUMA supply Full ceramic bearings for reasonable prices.

Full ceramic bearings, with both rings and balls made of ceramics, are known for their high temperature resistance and high strength. Some other advantages with Ceramic bearings are:

No lubrication needed
High rigidity
Corrosion resistant
Electrically isolating and Non-magnetic

Used in chemical industry, food-and beverage industry and in applications with high temperature up to +800°C.

Zirconium oxide (ZrO2)
Bearings of Zirconia is white, has a high melting temperature and can be used in chemical environments. Products of this material should not be used in applications above 400°C.

Silicon nitride (Si3N4)
Bearings of Silicon Nitride is gray black and withstands temperatures up to 800°C

NOTE! The temperature resistance of the Ceramic Bearing is in many cases limited by the form of the holder used in the application. PEEK holder can be used up to about 260°C, PTFE handle 180°C and PA66 can only withstand 100°C. It is only if the ceramic material used without cage, called "full roll" that temperatures up 800°C are possible.

See also hybrid bearings

	STEEL BALL BEARINGS (Not Stainless Steel)	HYBRID BEARINGS	CERAMIC BEARINGS (Si3N4)
Temperature resistance	Depending on which type of holder and seal. But normally 120ºC.	Depending on which type of holder and seal.	Depends on temperature sensitivity on the cage. Up to 800ºC
Lubrication	Lubrication is required	Less Lubrication is required	No Lubrication is required
Corrosion	Corrodes	The ceramic balls are corrosion resistant	Corrosion resistant
Lifetime	Normal	Approx. 5-20 times longer than Steel Ball Bearings	Low wear and longer lifetime
Strength	Normal	High compared to conventional bearing steel	Extremely high
Electrical isolation capability	Electricity destroys the Bearing surfaces	Very good	Very good
Weight	7,85 g/cm3	Ceramic Balls cause an approximate weight reduction of 60%, resulting in a lower weight than Steel Ball Bearings	3,20 g/cm3

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Ceramic Bearing leaflet (swe)