BMER-300 BM6-390 BMTE-315 Hydraulic Orbit Motor | High Torque Disc Valve Cycloid Motor

The BMER, BM6, and BMTE Series heavy-duty hydraulic orbit motors from Chengyuan Hydraulic are high-torque power units fully compatible with Danfoss, Eaton (Char-Lynn), and Parker standards for mobile and industrial applications. Utilizing an advanced disc valve distribution system, these motors deliver superior output torque, exceptional low-speed stability, and robust resistance to high-pressure spikes compared to traditional shaft-valve designs. For core models like BMER-300A12101, wheel-drive BMER-2-300WD/WS, and heavy-duty BM6-390, we integrate oversized tapered roller bearings. Every single unit undergoes 100% simulated overload and housing leakage testing before shipment, ensuring zero-leakage reliability under severe field conditions and guaranteeing 100% original-place interchangeability.

Technical Specifications:

• Series Model: BMER / BM6 / BMTE Series (LSHT Orbit Motor)

• Displacement Configurations: 200cc / 300cc / 315cc / 390cc

• Rated Operating Pressure: 175 bar to 205 bar (displacement dependent)

• Peak Pressure (Intermittent Spikes): 240 bar (24 MPa)

• Rated Torque Output: 570 $N \cdot m$ (200cc) up to 1100 $N \cdot m$ (390cc)

• Continuous Speed Range: 150 – 370 rpm

• Housing Variants: Standard Flange / WD (Wheel Drive) / WS (Wheel Short)

• Shaft & Port Options: 32mm Straight Keyed / 14T Splined / T4 (4-bolt flange side ports with case drain)

Key Technical Advantages:

• Advanced Geroler Set Geometry: The geroler star features integrated rollers that convert sliding friction into rolling friction. This reduces internal mechanical wear and dramatically lowers the minimum starting pressure ($< 5$ bar), providing full, responsive torque right at startup.

• Disc Valve Clearance Compensation: The valve plate rotates independently from the output shaft and incorporates automatic hydraulic clearance compensation. This maintains over 96% volumetric efficiency even during rapid reversals or thermal expansion, eliminating low-speed judder or crawling.

• Heavy-Duty Wheel Drive Bearing System (WD/WS): In models designated WD/WS, the mounting flange is positioned closer to the center of the bearing pack. Heavy-duty tapered roller bearings absorb extreme radial and axial shock loads directly from wheels or sprockets without auxiliary pillow blocks.

• High-Pressure Shaft Seal Protection: A vacuum-hardened main shaft paired with premium FKM (Viton) seals allows the motor to withstand backpressures up to 150 bar. This configuration lowers internal heat buildup and enhances reliability in multi-motor series circuits.

Application Areas:

• Construction & Municipal Machinery: Skid steer loader propulsion, street sweeper broom drives, and mini-excavator swing drives.

• Agricultural & Forestry Gear: Combine harvester reels, orchard vehicle wheel drives, and timber grapple rotators.

• Material Handling Equipment: Truck-mounted hydraulic winches, heavy-duty crawler conveyors, and crane auxiliary hoists.

• Industrial Mixing Applications: Shotcrete machines, concrete mixers, and low-speed chemical reactor agitators.

Expert Maintenance Tips:

• Case Drain Mandatory Rule: For high-pressure series applications, such as the BMER-2-300-WS-T4-S, a dedicated case drain line must be plumbed directly back to the reservoir. Keep case pressure under 20 bar to prevent shaft seal lip deformation.

• Pre-Priming Prior to Start-up: Once installed and before connecting main lines, pre-fill the motor housing with clean hydraulic oil via the case drain port. The internal matching faces require initial lubrication to prevent dry-start scoring.

• Oil Temp & Viscosity Management: For mobile machinery operating in hot weather, ensure the reservoir oil temperature stays below $80°C$. If the oil thins out too much (viscosity $< 20 mm^2/s$), low-speed stability and volumetric efficiency will drop.