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Spindle bearings

M-series High-Speed spindle bearings

M version

Cost-effective and robust

Schaeffler rolling bearings and plain bearings: M-version High-Speed spindle bearings

The balls and rings of M-series X-life High-Speed spindle bearings are manufactured from the proven 100Cr6 rolling bearing steel. This version provides a high-performance, cost-effective bearing solution for motor spindles.

Technical advantages

  • Robustness and high performance
  • Reduced bearing preload
  • High operating and limiting speeds
  • Available in open and sealed designs

Customer benefits

  • Cost-effective bearing solution
  • Longer machine running times
  • Lower maintenance and unit costs
HCM version

For outstanding productivity

HCM-type X-life High-Speed spindle bearings are equipped with temperature-resistant ceramic balls and rings made from 100Cr6 rolling bearing steel. Thanks to their high performance capability and suitability for very high speeds, HCM spindle bearings allow the performance of motor spindles to be increased.

Technical advantages

  • Robustness and high performance
  • Reduced bearing preload
  • Very high operating and limiting speeds
  • Available in open and sealed designs

Customer benefits

  • Higher performance
  • Longer machine running times
  • Very high productivity
  • Lower maintenance and unit costs
Schaeffler rolling bearings and plain bearings: HCM-Version High-Speed spindle bearings
VCM version

New degrees of freedom in design

Schaeffler rolling bearings and plain bearings: VCM version High-Speed spindle bearings

The VCM version also features balls made from ceramic material, but with bearing rings made from the newly-developed Vacrodur high-performance material. This steel is characterized by its extremely high load carrying capacity, wear resistance, and very high temperature resistance. This material demonstrates its capabilities particularly in the case of abnormal lubrication conditions or contamination. VCM-type spindle bearings specifically open up new levels of freedom when designing main spindles compared to conventional spindle bearings.

Technical advantages

  • Resistant to high temperatures of up to 400 °C
  • 13 times longer nominal rating life with EHD lubrication
  • 25 times longer nominal rating life under mixed friction conditions
  • Highest operating and limiting speeds
  • Available in open and sealed designs

Customer benefits

  • Outstanding performance
  • Significantly longer machine running times
  • Outstanding productivity
  • Highest possible machine availability
X-life - Proven to be better

The new M-series High-Speed spindle bearings

Three X-life High-Speed spindle bearing versions offer great potential for increasing the load carrying apacity of motor spindles even further with regard to maximum speed, high machining forces, and high temperatures.

M version – cost-effective and robust

  • Balls and bearing rings made from rolling bearing steel
  • Cost-effective bearing solution for motor spindles

HCM version – for outstanding productivity

  • Balls made from ceramic material, rings made from rolling bearing steel
  • High performance capability and suitability for

VCM version – new degrees of freedom in design

  • Balls made from ceramic material, rings made from Vacrodur high-performance steel
  • New degrees of freedom for the design engineer due to extremely high load carrying capacity, wear resistance, and very high temperature resistance
Schaeffler rolling bearings and plain bearings: X-life High-Speed spindle bearing
Innovative Vacrodur rolling bearing material

VACRODUR – New High-performance Material for Maximum FAG Spindle Bearing Performance

Schaeffler has developed the innovative Vacrodur rolling bearing material, which is proven to extend the operating life of spindle bearings, even under very difficult conditions. The benefits are generated here, particularly by high-speed motor spindles. Its use considerably reduces operating and maintenance costs and significantly increases productivity. Vacrodur has a very homogeneous structure with a high percentage of very finely dispersed carbides. The carbides are responsible for Vacrodur’s exceptionally high resistance to abrasive wear.

Grinding pattern of the standard 100Cr6 rolling bearing steel (left) and Vancrodur (right)

Properties and Advantages of Vacrodur

  • Very high hardness values of up to more than 65 HRC, which are the result of multi-stage heat treatment of the specially alloyed material.
  • A service life that is 25 times longer under mixed friction conditions compared to standard 100Cr6 rolling bearing steel.
  • An operating life that is nearly 24 times longer compared to the previous Cronidur benchmark.
  • A lifetime that is nearly 13 times higher under elastohydroynamic (EHD) lubrication conditions.
  • A dynamic load carrying capacity that is 2.4 times higher compared to standard 100Cr6 rolling bearing steel, a fact that has been proven in certified tests. This corresponds to a nominal bearing life that is 13 times longer.
  • Vacrodur bearings achieve a 40% higher static load rating in comparison to standard bearings. This was achieved through the high level of hardness and the resulting lower plasticizing tendency.
  • Thermal stability and robustness at high application temperatures of 400 °C.
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