Trelleborg Antivibration Solutions (AVS) has over 100 years’ experience in the global rail market. With our superior materials and technology, we help facilitate faster, smoother, quieter and safer rail travel. One company that has reaped those benefits is Indian Railways.
When selecting their partners, the state-owned national railway system of India demands exceptional product performance and industry expertise. Also, with passenger safety of crucial importance, only the best possible solutions are selected.
Recently, Indian Railways made the Trelleborg rectangular bearer spring the secondary suspension of choice due to its exceptionally long service life in India’s WAG7 freight locos.
Originally selected in the mid-1970s, the Metalastik rectangular bearer springs achieved a life of six years despite the forces exerted by tight turns on the track. A subsequent change to locally-manufactured parts resulted in a reduction to just nine months in service and so Indian Railways returned to the original Trelleborg product in 2000. Since then the company has supplied over 17,000 units and the service interval is back at six years once again.
The quality of the Metalastik product and its engineering has created a lasting solution for a very demanding application. With its robust rubber/metal laminated sandwich mount, fitted to the locomotive bogie it is able to absorb high levels of noise and vibration. They are designed to allow bogie rotation, track twist and lateral displacement. In a revised geometry some designs can also be used as traction centres. The bearer springs have been used in both new-build locomotives, and retrofit replacements in the refurbishment of older freight locomotives.
At Trelleborg Industrial AVS, we are very proud of our long-standing technical collaboration with Indian Railways. By working closely with their engineers, we have been able to further increase the product’s performance and significantly improve service life.