Raceway system bearing (LRL) - Overview

Raceway System Bearing (LRL) Product description

IBO raceway bearings (LRL) with bearing rings made of light metal proven in many times, have high load ratings, can be used in a diverse application and are very economical. Due to their construction, they carry radial, axial and tilting moment loads with one bearing location. Therefore, bearings with radial and axial bearing combinations can often be reduced to just one bearing location. This reduces the effort and costs for the design of the connecting construction and the installation of the bearings in some cases considerably.

Using high-tensile aluminium alloys for the ring material and steel forthe raceway rings allows to achieve a load rating capacity similar toconventional steel bearings - combined with the additional advantageof a weight reduction of up to 60%.

Furthermore, IBO raceway ring bearings are particularly suitable for:

  • Shock loads
  • Shock load vibrations
  • High and low operating temperatures
  • Uniform low frictional torque
  • High demands on corrosion-free requirement

IBO raceway bearings are sealed and pre-greased with a high-quality lubricating grease and can be re-lubricated via grease nipples. The standard designs have no gears. Of course, all series can be designed to specific project requirements with internal or external gears.

In the standard version, the bearing rings are anodized according to DIN 17611.

Raceway System Bearing (LRL) Design series

IBO has developed 4 standard series. The difference of these series is in the race way system. The associated product properties are described for each series. The conceptual design of the series designation is explained in the article systematic chapter.

LRLS2-06 design series

The main product characteristics are as follows:

  • Compact design
  • High rigidity
  • Constant frictional torque with uneven connection construction
  • Transmission of tilting moments
  • High static load rating
  • High axial load rating
  • High radial load rating

LRLV-10 design series

This series is relevant in need for the following product features:

  • Low frictional torque
  • Transmission of tilting moments
  • High sensitivity to friction due to uneven adjacent construction

LRLK-10 design series

The main product features ties of the LRLK-10- series are as follows:

  • Transfer of torque load
  • Installation space for drive and measuring gears
  • High rigidity
  • Equality of the frictional torque depending on the evenness of the connecting construction

LRLR-08 design series

In contrast to the three before mentioned series, which are a 1-bearing solution, the LRLR-08 series is a 2-bearing solution. With a 2-bearing solution, the LRLR-08 bearing can be used as a floating bearing and offers the following product features:

  • High rigidity in the load direction
  • Low frictional torque
  • Floating bearing function, with axial displacement from the central position


Running accuracy

The following tables show the associated concentricity and axial run-out depending on the respective running circle diameter. The running accuracies apply to the rotating inner or outer ring.

Laufringlager (LRL) - Rundlaufgenauigkeit
raceway system bearing (LRL) - radial run out accuracy
Laufringlager (LRL) - Planlaufgenauigkeit
raceway system bearing (LRL) - axial run out accuracy

Installation tolerances

The following table shows the tolerance of the bearing height H depending on the design:

Height tolerances



Standard Version (0)

Restricted clearance (1)

Increased clearance (2)













The pitch circle diameters for the mounting bore holes in the respective inner and outer ring are tolerated in accordance with DIN ISO 273-m and are shown in the table below:

Pitch circle diameter









1 200


Raceway system bearing (LRL) Rigidity

The rigidity values ​​of the race way system are shown in the tables below

  • Axial rigidity
  • Radial s rigidity
  • Tilting rigidity

relate explicitly to the respective race way system, regardless of the connecting construction. These tables are used to compare the 3 different series for the product selection of a 1-bearing solution.

The calculation of the rigidity values ​​is based on the standard version 0.

Laufringlager (LRL) - axiale Steifigkeit
raceway system bearing (LRL) - axial stiffness
Laufringlager (LRL) - radiale Steifigkeit
raceway system bearing (LRL) - radial stiffness
Laufringlager (LRL) - Kippsteifigkeiten
raceway system bearing (LRL) - tilting stiffness

Raceway System Bearing (LRL) - Load ratings

The following tables compare the respective load ratings of the three series for the 1-bearing solution:

  • radial dynamic load rating
  • axial dynamic load rating
  • radial static load rating
  • axial static load rating

The calculations of the load ratings are based on the standard version (0). The load ratings differ for versions (1) and (2); these can be provided on request.

Laufringlager (LRL)- radiale dynamische Tragzahl
raceway system bearing (LRL) - radial dynamic load rating
Laufringlager (LRL) - axiale dynamische Tragzahl
raceway system bearing (LRL) - axial dynamic load rating
Laufringlager (LRL) - radiale statische Tragzahl
raceway system bearing (LRL) - radial static load rating
Laufringlager (LRL) - axiale statische Tragzahl
raceway system bearing (LRL) - axial static load rating

Raceway System Bearing (LRL) - Product table