Danfoss OMV 630 151B2163 orbital hydraulic motor

Danfoss OMV 630, part number 151B2163, is a fixed-displacement orbital hydraulic motor for low-speed, high-torque drives. The factory geometric displacement is 629.1 cm³/rev. Nominal size 630 identifies the series size and differs from the exact geometric displacement.

The factory execution uses a tapered keyed shaft: Dia. 2 1/4 inch, 1:8, 1 1/2 - 18 UNEF thread in shaft end. Refer to the original shaft-end or wheel-hub drawing for spline, key, threads and tolerances.

Mounting type: 4 Bolt - Square; locating pilot 160.0 mm; bolt circle 200.0 mm. Main port connection: 1 5/16-12 UN-2B SAE O-Ring port. Drain connection: 9/16-18 UNF-2B O-Ring port. Port arrangement: Sideport - staggered. The motor uses Geroler gearing and disc valve with valve drive. Factory check-valve provision: Yes.

Select the operating point from the size-specific hydraulic data and performance diagram. Continuous, intermittent and peak limits represent separate operating duties and must not be combined into one maximum-duty point. Differential pressure differs from maximum inlet pressure. Observe the applicable shaft loading, shaft-seal pressure, return pressure and drain requirements.

Representative Danfoss OMV photograph supplied on this article’s manufacturer page; shaft, ports, mounting, brake arrangement and displacement may differ. Refer to the technical PDF for exact specifications.