Contact surface between train wheel and rail
Considering the long time operation, the nut may have loose, so the inside will not be like the car wheels like that in the process of moving the wheel to fly out, there is in the curve of time can effectively prevent the derailment occurred.
The two wheel with the rail on the inside, the country for the axle, in the gold processing, the axis of the two end will leave about 50 wire axis file, so that after the bearing is installed, it will not continue to slide inside, play a fixed role, the outer end with nut tightening
Because the wheels of the train all have rims, you can go and have a look at it, that is, a part of the inside of the wheel. The main function of this wheel flange is to guide and prevent derailment. The rim has a very complex profile. The standard requirement is that if the flange of a car is too worn out, it is prone to derailment. The machined flange must be machined to the standard contour.
