K6 bogie is domestic main type 25t shaft weight freight bogie. The bogie is casting steel three parts structure. Bolster and side frame are B casting steels. Side beam is wide guide frame structure; a down cross supporting device is additionally arranged between two side beams; the first suspension system is arranged with modified shaft box rubber gasket; the second suspension system is central bolster spring suspension system with friction shock absorb device. 

Main technical parameters:  

Fixed shaft distance/mm      1830

Center plate load from the surface of the center plate to the track surface height     65.7kN 

Unloaded vehicle/mm       680 

Lower center plate diameter/mm      375 

Wheel diameter/mm       840 

Track gauge /mm      1435 

Shaft weight/t       25

Deadweight/t approximately      4.8

Commercial operation speed/km/h      120

Speed limit passing through minimum curve radius/m      145