Driving pin

Driving pin, right. Driving wheel set (bolster axle) of a class 44 locomotive . In the middle above the crank of the third cylinder.

The drive pin (CH: sometimes drive pin ) is a cylindrical pin on the drive wheel of a locomotive, on which the drive rod engages, which transfers the force from the cylinder to the wheel . The drive pin is usually made of high quality steel , as it has to withstand high forces.

The drive pin corresponds to a locomotive for other crank drives the crank of a crankshaft . The distance from the center of the drive pin to the center of the wheel is also called the offset and is exactly half the stroke of the piston .