SKF hybrid bearings

Mixing materials for more fan compressor uptime

Well suited to compressor operating requirements, SKF hybrid bearings feature a robust mix of steel bearing rings and silicon nitride rolling elements.

Silicon nitride is an electric insulating ceramic that also has a lower coefficient of thermal expansion, making the hybrid bearing less sensitive to temperature gradients at high temperatures. The capability to run under poor lubrication enables design of low friction solutions in which the bearings run cooler, design is simpler and friction significantly reduced. Thanks to the lower material density of the ceramic rolling elements and lower inertia, higher speeds and more rapid starts and stops are possible.

An excellent multi-functions-in-one solution, SKF hybrid bearings offer several benefits:
  • Greater reliability
  • Reduced maintenance
  • Extended service life
  • Lower operating costs
  • Effective electrical insulation
  • Global availability and support

SKF hybrid bearings

Longer lasting under extreme conditions

SKF hybrid bearings use balls or rollers made of silicon nitride, a ceramic material with unique characteristics that make it an excellent choice for applications that require high speed, high stiffness, and electrical insulation properties, among others.

Featuring a very smooth service finish and low conductivity, SKF hybrid bearings cut lubricant consumption and open up a wide range of possibilities for rolling bearings. Features include:
  • Lower density - Silicon nitride balls have a density of only 40% of similar steel balls, enabling higher speeds, less weight, lower inertia, plus more rapid starts and stops.
  • Low friction - Silicon nitride's low coefficient of friction enhances wear resistance, allowing bearings to run cooler even when they are poorly lubricated.
  • Higher modulus of elasticity - Ceramic balls have 50% higher modulus elasticity than steel for increased bearing stiffness.
  • Low conductivity - Ceramic balls act as a barrier to electrical current passing between inner and outer rings, thereby delivering a simple method of insulation.
  • Lower coefficient of thermal expansion - Ceramic balls have a thermal expansion only 29% of similar steel balls, which allows less sensitivity to temperature gradients for more accurate preload control.
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