In a crankshaft 200, one hole 213L formed in a crankpin 213 has a bottom surface having a larger area and a depth from a surface of the crankpin less than those of another hole 213M. In forming the hole 213L and the hole 213M, a preformed product 200 of the crankshaft having a shape smaller than that of a cavity is disposed in a die set and punches are simultaneously inserted into the crankpin 213. By this operation, the hole 213L and the hole 213M are simultaneously formed in each crankpin 213 of the preformed product 200.

A crankshaft having an axis of rotation is disclosed. The crankshaft includes a main throw having a web, a main pin extending from the web that is coaxial with the axis of rotation and an aperture in the web. The crankshaft also includes a crank throw having a web, a crank pin extending from the web, a central aperture positioned in the web that is coaxial with the axis of rotation. The crank pin is positioned in the aperture of the main throw and a connecting rod is positioned on the crank pin. The crankshaft includes various features for distribution of oil to components.