Y31 and Y33 - Wide range of applications and low main bolster
The bogie Y 31 is part of the bogie family Y25. Developed for use in particular with wagons for combined freight transport, this type has the same wheelbase as the Y25 but generally features wheelsets with a smaller tread diameter and a cross member with a low main bolster. (or reduced contact hight)
The bogie Y33 is part of the bogie family Y25. Developed for use in special vehicles, including those for combined freight transport, it has a 2 m longer wheelbase than the Y25. This ensures smoother running at higher travel speeds despite identical drive design. The Y33 covers a wide range of operational boundary conditions with regard to tread diameter, axle load and car contact height.