Danfoss OMT EM 250 151B3702 orbital hydraulic motor

Danfoss OMT EM 250, part number 151B3702, is a fixed-displacement orbital hydraulic motor with 251.8 cm³/rev geometric displacement. This execution provides integrated em speed sensor for rotational-speed monitoring.

The motor has a 38.1 mm cylindrical keyed output shaft, a 127 mm locating pilot and a 161.9 mm mounting bolt circle. Main ports are 1 1/16-12 UN O-ring boss; the drain connection is 9/16-18 UNF O-ring boss. The shaft, flange and ports must match the mating installation.

The EM execution includes a PNP speed sensor. The US standard execution has a 2 m molded-in sensor cable. The selected original pages give electrical specifications, wiring and the size-specific EM mounting envelope. The current factory article identifies the exact part number; the technical reference retains the original manufacturer edition.

Select the operating point from the applicable size performance diagram and observe shaft-load, drain-line and shaft-seal pressure limits. Continuous, intermittent and peak limits describe separate duties. They must not be combined into one simultaneous maximum-duty point, and differential pressure is distinct from maximum inlet pressure.

Representative Danfoss OMT series photograph supplied on this article’s manufacturer page; shaft, ports, mounting, sensor arrangement and displacement may differ. Use the technical reference for the confirmed execution.