| Series | O-Series |
|---|---|
| Type of Pump & Motor | Orbital Motor |
| Flow Rate (CC Per Rev) | 8 |
| Part Number | 151G0049 |
| Manufacturer | Danfoss Power Solutions |
| Motor Series | O-Series |
| Basic Motor | OMM |
| Displacement | 8 cm3/rev |
| Design Number | 3 |
| Port Style | Side ported - aligned |
| Check Valve | Yes |
| Gear Wheel Set | Standard |
| Front Bearing | Journal bearing |
| Rear Bearing | Journal bearing |
| Dust Seal | Standard |
| Seal Kit | 151G0202 |
| Packing | Single pack |
| Drain Port Style | Standard - End cover |
| Port Size | 9/16-18 UNF |
|---|---|
| Shaft Size | Dia. 5/8 inch - 1/4-28 UNF tap |
| Shaft Seal | NBR - Standard |
| Mounting Flange | 3 Bolt - Round |
| Mounting Thread Dimension | Pilot dia. 31,5 x 5 [1,24 x 0,20] - B.C. dia. 45 [1,77]; 1/4-28 UNF |
| Shaft Style | Straight |
| Shaft Key | 3/16 x 3/16 x 3/4 inch |
| Port Dimension | 9/16 - 18 UNF |
| Drain Port Dimension | 3/8 - 24 UNF |
| Gerotor Width | 3.5 mm |
The Danfoss OMM 8 orbital motor (part number 151G0049) is a low-speed, high-torque gerotor motor from the Danfoss O-Series, built to imperial dimensions with a 5/8 inch shaft and 9/16-18 UNF ports. It is the imperial counterpart to the metric 16 mm shaft OMM range, and is the version to specify when replacing North American equipment or matching existing imperial plumbing.
Mounting and shaft
A 3-bolt round mounting flange with a 31,5 mm pilot on a 45 mm bolt circle, tapped 1/4-28 UNF. The output shaft is a straight 5/8 inch diameter with a 1/4-28 UNF tap and a 3/16 x 3/16 x 3/4 inch key.
Porting
Work ports are 9/16-18 UNF, side ported and aligned, with a 3/8-24 UNF drain port in the end cover. An integral check valve is fitted as standard.
Construction and sealing
Journal bearings front and rear, standard gear wheel set, standard dust seal and an NBR shaft seal. The matching service kit is seal kit 151G0202, common across the OMM range on this design number.
Metric or imperial?
If your installation uses a 16 mm shaft and G 3/8 BSP ports, you need the metric version instead. Browse the full orbital motors and steering range, size the duty with our hydraulic calculator, or ask an EMPH engineer to confirm which variant fits your machine.
