Kugellager und Mehr - Laeppche Unternehmensgruppe

BALL BEARINGS – EFFECTIVE AND
VERSATILE MACHINE ELEMENTS

 

KugellagerIn contract to sliding bearings, which also include spherical plain bearings, with rolling bearings, balls or rollers reduce frictional resistance. Rolling bearings include cylindrical roller bearings and needle roller bearings, for example. The most frequently used form, however, is the ball bearing. In this case, the rolling elements are balls that roll in the raceways of the inner and outer rings. A cage holds them in the proper position. There are many ball bearing designs. The following materials are used:

  • Chrome steel in various alloys for all bearing parts
  • Stainless steel for all bearing parts
  • Ceramics for the balls or, less frequently, for bearing rings
  • Brass for the cage
  • Plastic for the cage

 

Ball bearings have a wide variety of uses; in contrast to roller bearings, however, they are primarily used at higher speeds and with lower loads. Typical application areas include:

  • Household appliances
  • Electric power tools
  • Production machinery and machine tools
  • Medical technology
  • Automotive engineering


The most usual type is the deep groove ball bearing, in which the balls in the inner and outer rings roll in a groove. These bearings can absorb radial forces and low axial forces. Deep groove ball bearings come in single row and double row versions. They can also be used as housed bearing units, i.e. as plummer blocks, flanged bearings or insert ball bearings. As special form is the thrust ball bearing used to absorb axial forces.

In an angular-contact ball bearing, the inner and outer rings have only one shoulder each. The balls move between them. These bearings can absorb radial forces and unilateral axial forces. In addition to the single row bearings, there are also double row angular-contact ball bearings, which can withstand loads in both axial directions and radially. A special form is the four-point contact bearing, in which the balls only contact the raceway at four points. There are also angular contact thrust ball bearings. Because they enable a high degree of accuracy, they can be used to support ball screws, for example.

In a magneto bearing (separable ball bearing), in the inner ring the balls move in a groove, while the outer ring has a shoulder. These bearings can be taken apart and are easy to install. These bearings can absorb radial forces and unilateral axial forces and are suitable for use at high speeds in low load conditions. Self-aligning ball bearings have two rows of balls and the inner ring with the cage and the balls can swivel easily. This allows compensation for alignment errors. Self-aligning ball bearings can withstand loads in both axial directions and radially.