Wheelset Solutions

CAF MiiRA: Experts in cold-rolled Axles

A cold rolled axle can withstand much high service loads without cracking.

Specially indicated for locomotive wheelsets and heavy haul applications.

Our completely automated cold-rolling line can treat the seats, the grooves or all the surface of the axle, in a fully controlled, repetitive way. The process allows to:

  • Increase the hardness on the surface and deep below.
  • Introduce strong compressive residual stresses deep under the surface.
  • Reduce the surface roughness

The result is an axle with a higher fatigue limit, resistant to crack formation and propagation. The overall safety margin is significantly increased and the inspection intervals can be extended, allowing to obtain improvements in maintenance costs.

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