MUMBAI’S suburban trains are subject to high passenger loadings during the peaks, and coil springs in the primary suspension of the city’s EMU cars have proved unreliable with a short life expectancy.

Indian Railways approached Trelleborg and requested a revised suspension design for new-build trains, which could also be retrofitted to the existing stock.

The company developed a custom version of its Metalastik Metacone primary suspension, which is intended to provide a smoother ride with less vibration than from the coil springs. The rubber-metal spring assemblies offer the operator a longer service life, and have an integral overload buffer to cope with varied track conditions.

Trelleborg Industrial, UK