The track load capacity means the permissible load at which the outer ring of a bearing andthe mating surface are capable of withstanding repeated use over a long period.
The track load capacity provided in the specification table indicates the value when using a steel material with tensile strength of 1.24kN/mm2 as the mating material. Therefore, it is possible to increase the track load capacity by increasing the hardness of the material. Fig.2 shows the hardness of the mating material and the track capacity factor in relation to tensile strength. To obtain the track load capacity of each mating material, multiply the track load capacity shown in the corresponding specification table by the respective track load factor.

  • Note) For the mating material, we recommend using those materials with the raceway hardness of 20 HRC or higher and the tensile strength of 755N/mm2 or higher.