scope:

This International Standard specifies sizes, dimensions and an identification code for positive displacement hydraulic fluid power pump and motor mounting flanges of the following types: - two-bolt flanges; - four-bolt flanges. It also specifies sizes, dimensions and an identification code for positive displacement hydraulic fluid power pump and motor shaft ends of the following types: - straight shafts without thread; - straight shafts with thread; - 30° involute spline. It provides: - a minimum number of flange and shaft sizes; - composite dimension reference and identification codes for pumps and motors; - simplified dimensional interchangeability with regard to flanges and shafts; - prefered sizes and dimensions for new designs.