BMER Series Hydraulic Orbit Motor | BMER-2-250-WD BMER-750 | Low Speed High Torque Drive Motor

The BMER Series Hydraulic Orbit Motors by Chengyuan Hydraulic are high-performance axial flow drive units engineered for demanding heavy-duty applications. Designed as premium replacements for the Parker TF/TG series and Char-lynn models, the BMER series provides 100% original-place interchangeability. Its advanced roller-vane geometry delivers high torque at low speeds with exceptional mechanical efficiency. Every motor undergoes 100% simulated condition testing to guarantee leak-free performance and superior durability in extreme environments.

Technical Specifications :

• Representative Models: BMER-2-250-WD, BMER-2-300-WD, BMER-375, BMER-540, BMER-750

• Displacement Range: $125\text{ ml/r}$ to $750\text{ ml/r}$

• Max Continuous Pressure: $20.5\text{ MPa (205 bar / 2970 psi)}$

• Max Intermittent Pressure: $24.0\text{ MPa (240 bar / 3480 psi)}$

• Max Output Torque: $500\text{ N}\cdot\text{m}$ to $1500\text{ N}\cdot\text{m}$ (Displacement dependent)

• Max Speed Range: $150\text{–}600\text{ rpm}$

• Mounting & Shaft: WD (Wheel Mount), 6B Spline, or Straight Key

• Flow Type: Axial Distribution Flow with high-pressure shaft seal

Key Technical Advantages:

• High-Pressure Shaft Seal: Equipped with premium-grade shaft seals, the BMER series can withstand high backpressures, often eliminating the need for a separate drain line and simplifying hydraulic plumbing.

• Optimized Roller-vane Geometry: The inclusion of rollers in the gear ring reduces friction during startup. This translates to high mechanical efficiency and powerful starting torque, ensuring smooth acceleration under heavy loads.

• Precision Axial Distribution: The advanced distribution disc features automatic wear compensation. This maintains high volumetric efficiency throughout the motor’s lifespan and allows for stable, precise control at ultra-low speeds.

• Superior Radial Load Capacity: Specifically designed for wheel-drive (WD) applications, the reinforced housing and large bearings can directly support radial loads from vehicle weight or boom movements without additional structural support.

Application Areas:

• Mobile Equipment: Wheel loaders, mini-rollers, and aerial work platforms.

• Agriculture: Combine harvester header drives, self-propelled sprayers, and seeders.

• Marine & Fishing: Net haulers, anchor winches, and deck cranes.

Expert Maintenance Tips:

• Priming & Bleeding: Before initial startup, fill the motor through the return port with clean hydraulic oil. Run at low pressure for 10 minutes to exhaust air and prevent “dry friction” on the distribution disc.

• Overload Protection: Ensure the system relief valve is set to no more than $90\%$ of the motor’s peak pressure rating to protect against catastrophic hydraulic shocks if the actuator stalls.

• Filtration Management: Maintain system oil cleanliness at ISO 4406 19/17/14 or better. Inspect and replace hydraulic filters every 1500 operating hours to prevent internal abrasive wear.