Danfoss OMT T 250 151B3044 orbital hydraulic motor

Danfoss OMT T 250, part number 151B3044, is a fixed-displacement orbital hydraulic motor with 251.8 cm³/rev geometric displacement. This execution provides mechanical tacho-drive connection for rotational-speed monitoring.

The motor has a 40 mm cylindrical keyed output shaft, a 125 mm locating pilot and a 160 mm mounting bolt circle. Main ports are 3/4" BSP; the drain connection is 1/4" BSP. The shaft, flange and ports must match the mating installation.

The mechanical tacho-drive connection allows rotational speed to be registered using an appropriate attached device. The local reference combines the confirmed hydraulic data, main output shaft and port details with the manufacturer tacho-drive principle and the exact factory-bound tacho assembly drawing. The drawing gives the rear-drive interface and the size-specific overall assembly lengths. Check the applicable part-number row before installation.

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.