ISO/TC 131/SC 2 - Pumps, motors and integral transmissions

This part of ISO 3019 specifies sizes and dimensions and establishes an identification code for the two- and fourbolt mounting flanges and the shaft ends of positive-displacement, rotary hydraulic fluid power pumps and motors. It is applicable to cylindrical keyed shaft ends with an external thread, as well as to those without a thread, to conical keyed shaft ends with an external thread and to 30° involute spline shaft ends. NOTE Involute spline is in accordance with SAE J744 [1].

Describes and systematically defines the principal technical characteristics, and allots letter symbols to these characteristics, and indicates how they can be more clearly defined by suffixes corresponding to particulate cases. Lists also an analysis of parameter dimensions. Gives examples for the use of symbols with suffix, and includes definition of terms without symbols.

Establishes the geometric displacements of pumps and motors having rotating or oscillating drives, and is also applicable to variable displacement units; in such cases, the values refer to the maximum displacement. The displacements specified may be used to derive other basic design criteria and normal ratings. Tabulates nominal values for diplacements from 0,1 up to and including 9000 millilitres per revolution.