ISO International Standard

Hydraulic fluid power — Dimensions and identification code for mounting flanges and shaft ends of displacement pumps and motors — Part 1: Inch series shown in metric units

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].

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