Explain coning of wheels with neat sketch
If the flanges of the wheel are flat then due to shocks there will be movement between wheel and the rails and due to which, vehicle will not be maintained in central portion and there will be unequal distribution of load. Therefore, the flanges are made in the shape of cone with a slope of l in 20. This is termed as coning of wheel. It will also help in decreasing the wear and tear of the flanges and the rail. To prevent rubbing inside face of rail and flanges, the distance between inside edge of flanges kept less than the gauge and thus the pressure is always maintained at the inner edge of rail due to coning of wheel.