BMR-315 Danfoss OMR Equivalent Hydraulic Motor 315cc

Product Overview

The BMR-315-2-A-D-B-N is a highly reliable Low Speed High Torque (LSHT) hydraulic orbital motor. Engineered with classic Spool Valve distribution and a robust Geroler gear set, this motor delivers excellent power density and smooth low-speed maneuverability within a compact footprint. Adhering to the strictest industrial B2B manufacturing standards, our BMR series guarantees 100% drop-in interchangeability with global top-tier brands, making it a perfect replacement for Danfoss (OMR series), Eaton Char-Lynn (H/S series), and M+S (MR series). Every single BMR-315 undergoes 100% simulated working condition testing before leaving our facility, ensuring maximum cost-efficiency and relentless performance for your hydraulic systems.

Technical Specifications

• Complete Model Code: BMR-315-2-A-D-B-N

• Geometric Displacement: 314.9 cm³/rev (19.2 cu in/rev)

• Max. Continuous Pressure: 8.5 MPa (1230 PSI)

• Max. Intermittent Pressure: 11.5 MPa (1670 PSI)

• Max. Speed: 190 RPM (Continuous) / 240 RPM (Intermittent)

• Max. Flow Rate: 60 L/min (15.8 GPM, Continuous) / 75 L/min (19.8 GPM, Intermittent)

• Max. Output Torque: 360 N·m (3180 lb-in, Continuous) / 470 N·m (4160 lb-in, Intermittent)

• Control/Design Type: Spool Valve Distribution, Geroler Gear Set

• Approximate Weight: 7.8 kg (17.2 lbs)

Key Technical Advantages

• 100% Drop-in Interchangeability: Standardized 2-bolt SAE A flanges, output shafts, and port threads match industry norms perfectly. OEMs and end-users can seamlessly replace Danfoss OMR motors without modifying machinery or hydraulic plumbing, drastically reducing downtime and costs.

• High-Pressure Shaft Seal Design: Equipped with a heavy-duty shaft seal capable of withstanding elevated system back pressures. This ensures long-lasting leak-free operation, especially in series circuits or applications with frequent stop-start cycles.

• Advanced Geroler Gear Set: Unlike traditional Gerotor designs, the Geroler incorporates cylindrical rollers into the gear set. This significantly reduces rolling friction and wear, leading to higher starting torque and remarkably smooth rotation even at ultra-low speeds.

• Optimized Spool Valve Distribution: The precision-machined spool valve is integrated into the output shaft. Its hydrodynamically optimized fluid channels minimize internal pressure drops, boosting overall volumetric efficiency and power conversion.

Application Areas

• Construction & Road Machinery: Brush drives for road sweepers, vibration and travel drives for light road rollers.

• Agriculture & Forestry: Auxiliary drives for combine harvesters, agricultural winch systems, and feed roller drives for wood chippers.

• Industrial Manufacturing: Screw drive motors for plastic injection molding machines, light-to-medium conveyor belt drives, and machine tool auxiliary rotary mechanisms.

Expert Maintenance Tips

• Case Drain Line Configuration: If the return line back pressure exceeds 10 MPa, or if multiple motors are connected in series, a case drain line must be installed to protect the high-pressure shaft seal from sudden pressure spikes.

• Fluid Filtration Standards: To protect the fine clearances of the spool valve mechanism, maintain the hydraulic fluid cleanliness at ISO 4406 20/18/15 or better.

• Cold Start Protocol: When starting in cold environments (fluid temperature below 20°C / 68°F), run the system at low pressure and no load for 10-15 minutes. Wait until the oil temperature rises and viscosity normalizes before applying full load to prevent cavitation and premature wear.

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