The rail that gives the common rail diesel its name is responsible for distributing the fuel that is compressed by the high-pressure pump to up to 2,700 bar to the injectors of the respective cylinders. At the same time, it serves as a high-pressure fuel accumulator to compensate for pressure fluctuations. Regardless of whether the application involves passenger cars, trucks or construction machinery, Hirschvogel has longstanding experience in the design and production of a wide variety of rails for a multitude of applications.

Production processes

  • Hot forging
  • Deep-hole drilling
  • Milling
  • Assembly
  • Leakage test


  • Dispersion-hardening steels
  • Bainitic steels
  • Heat-treatable steels


  • Pressure tight
  • High fatigue strength