Tester according to EN 12080+A1, clause 9

for expansion test of inner bearing rings of railway axle bearings

In order to increase the safety of railway transport, rules for the testing of railway axle bearings have been developed and are set out in EN12080 and subsequently in its revised form EN12080+A1 of 2022.

This standard has been developed with a focus on optimal technical parameters in the field of rail transport. The technical parameters determine the quality level of on-board running gear of railway vehicles.

This standard specifies the method of manufacture, material properties, geometry and dimensions of bearings, mechanical and physical properties and, last but not least, the method of testing bearings and their parts.
The EN 12080 tester deals with the expansion test of inner bearing rings.
The expansion precedes other tests such as the eddy current test or the ultrasonic test.
By expanding the inner ring by 0.0015 times the diameter, the defective ring either breaks or cracks become visible, which are then detected in other test equipment.

This European Standard specifies the quality parameters of axlebox rolling bearings supporting the load of the vehicle, required for reliable operation of trains on European networks. It covers metallurgical and material properties as well as geometric and dimensional characteristics. It also defines methods for quality assurance and conditions for approval of the products.