Primary spring system for train GMT

Many often-primary suspensions of steel coil springs type are preferably used between wheel axle boxes and bogie due to the relatively long travel and the relatively small stiffness provided.

Coil springs have the disadvantage in transversal to accept only small forces.
So the resilient horizontal support in driving direction must be transversally taken over by further construction units.

In addition, metallic coil springs do not filter Vibrations and impact sound as well.Isolation by means of a rubber layer spring brings noticeable improvements.

Due to the lake of space conditions in the regional trains, which is smaller than the long-distance rail, the complete Primary spring system should be arranged as compact as possible.These requirements fulfill the GMT- primary spring system.
The serviceability of the construction was proven by a life durability test

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