Danfoss OMT 400 151B3004 orbital hydraulic motor

Danfoss OMT 400, part number 151B3004, is a fixed-displacement orbital hydraulic motor for low-speed, high-torque drives. Its geometric displacement is 410.9 cm³/rev; the nominal size 400 is a size designation rather than a substitute for the exact displacement.

The execution has a 40 mm cylindrical keyed output shaft, a standard four-bolt flange with 125 mm pilot and 160 mm bolt circle. Main connections are 3/4 inch BSP parallel ports, with a 1/4 inch BSP drain connection. Check valves are provided.

The manufacturer table gives separate continuous limits of 305 rpm, 1080 N·m torque, 180 bar differential pressure, 125 l/min oil flow and 30 kW output for the relevant size and shaft group. These maxima are not a single simultaneous operating point. Differential pressure is not an inlet-pressure rating. Use the original performance diagram, shaft-load limits and shaft-seal pressure conditions when selecting the operating point.

Intermittent table values apply for at most 10% of each minute; peak values, where stated, apply for at most 1% of each minute. The performance diagrams specify their oil viscosity, temperature and return-pressure test conditions. Drain-line arrangement and back pressure must follow the applicable manufacturer pages.

The factory article identity and execution are listed in the manufacturer product catalogue. The local technical reference combines the original ordering table, relevant size data, performance diagram, shaft and port details, and applicable mounting drawing. Representative manufacturer dimensional drawing; use the complete PDF for dimensions.