SKF is a leading manufacturer of rolling and plain bearings for traction motors in railway systems. The Schaeffler Group has developed high-performance matching solutions for rail vehicle applications.

The basic requirements of modern electric drives in the railway industry, such as cost-effectiveness, reliability, operational reliability and safety, sufficient service life and low maintenance costs, are largely influenced by the forces, additional loads and environmental influences. Rolling bearings are wear parts of the drive, so all industry-specific requirements must be considered and met. For electric drive bearings, factors must be considered: load, speed, continuity, vibration, temperature, life, structure, environment, friction, lubrication, maintenance.

Motor bearings For bearings in standard motors and tandem motors, the operating life is the same as the grease life, because depending on the shaft height, many motors may have sealed bearings that are lubricated for life. The grease life determines the life of the bearing. For traction motors, the bearing size is determined in the same way as for standard motors, with the help of fatigue life calculations. In the industry, fatigue life is not measured in hours, but in kilometers traveled. The rated life of traction motor bearings is determined by the fatigue life of the bearings, because they are usually relubricated. The maintenance interval of traction motor bearings must be considered together with the rated life. The rated life should be as long as possible and the bearing size should be as small as possible, allowing higher speeds and longer lubrication intervals. The selection of the appropriate cage guide type and cage design for traction motor bearings, the correct fit and the selection of the correct internal clearance are also extremely important for long-lasting and reliable operation.

Bearings in railway systems must be able to withstand extreme loads and require good wear resistance, corrosion resistance, temperature resistance, impact resistance and other properties to meet high safety standards. Keller bearings have many years of experience in the railway field and can provide comprehensive technical expertise, top quality and products that are perfectly suitable for any application. Keller railway bearings include application consulting work by scientific research experts in railway systems, calculation testing and assembly of rolling bearings. Keller has a closely connected network of external engineers, service and sales technicians who serve you worldwide to ensure
short distance travel and fast response time. At the same time, Keller also provides professional and efficient railway bearing repair services.