To further increase productivity, China will also increase railway cargo capacity per freight car from today’s 60 tonnes to 80 tonnes. The maximum speed of the freight trains will also be increased, from 80 km/h to 120 km/h. To meet these targets and to further improve the operating safety
Production began with 130 x 230 TBUs for 21-tonne axle load, using an upgraded design. introduced the compact tapered roller bearing unit (CTBU) concept to the Chinese market. The Chinese Ministry of Railways has decided that the CTBU design 150 will become the Chinese standard design for freight cars with 25-tonne axle load.
Metric TBUs
These TBUs incorporate the following design features:
New optimized polymer cage
Improved raceway micro-geometry
Integrated labyrinth lip (LL) low friction rubber seal
High-performance grease.
The optimized cage is made from reinforced polymer and has proven excellent in operation, particularly in terms of safety and performance.
The metric TBU range includes TBU 130 and TBU 150 (Chinese standard), as well as TBU 120 and TBU 130 (European standard) and further TBU 160.