X-life cylindrical roller bearings offer higher running speeds, higher dynamic load ratings and longer service life

Written by: Schaeffler (UK) Ltd | Published:

Schaeffler has extended its X-life range of high performance, premium quality cylindrical roller bearings with two additional products that offer improved performance, extended maintenance intervals and extremely high power density. The bearings are ideal for machine tool applications such as high speed turning, milling and grinding machines.

The N10 (single row) and NN30 (double row) series of X-life cylindrical roller bearings, which are available with inside diameters of 30mm up to 120mm, benefit from optimised surfaces and an improved internal design. The bearing cage is made from high performance polyamide (polyphthalamide) with optimised friction characteristics. This means the lubrication groove and lubrication bore are no longer required. The bearings are also interchangeable due to their matching enveloping circles.

These design improvements result in distinct technical advantages including:

  • Up to 25% increase in limiting speeds.
  • Up to 19% higher dynamic load ratings.
  • Up to 65% longer nominal rating life (L10).
  • Running temperatures reduced by up to 12K.
  • Longer grease operating life.
  • Less friction.
  • Reduced noise levels.
  • Ideal for combining with high speed axial bearings (BAX).

In machine tool applications, the bearings provide outstanding productivity for higher cutting performance, as well as extended maintenance intervals for greater machine availability. The bearings are also cost effective with a very high power density.

Reduced Total Cost of Ownership

Users of bearings are increasingly aware that the purchase price is one of many criteria that should be considered when selecting a suitable bearing. Rating life and service requirements, as well as possible bearing failure, are also important factors. In practice, this means users are more likely to choose higher quality bearings that offer longer rating and operating life, increased reliability and extended maintenance cycles, as machines fitted with these bearings will offer a competitive advantage.

The design envelope or footprint of a machine is also important. For an OEM or machine builder, a more compact design can improve the competitiveness of a machine. At the same time, power density and performance requirements of machines are increasing. This, in turn, has resulted in increased stress on machine parts, including drive components and bearings.


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