BMD Series Hydraulic Motor | BMD-250 BMD-315 BMD-400 BMD-630 | High Torque

LIC Hydraulic specializes in the BMD Series, a premium range of disc valve orbit hydraulic motors designed for applications demanding high torque and high efficiency. Spanning from the compact BMD-250 to the heavy-duty BMD-630, this series features an advanced Geroler set with a roller-driven geometry that ensures smooth, continuous rotation even at ultra-low speeds. With its robust disc valve distribution and reinforced bearing housing, the BMD series is a direct-fit, high-performance alternative for systems requiring reliable rotary power in construction, agriculture, and industrial manufacturing.

Technical Highlights

• Disc Valve Distribution: Automatically compensates for wear to maintain high volumetric efficiency over thousands of operating hours.

• High Axial & Radial Load Capacity: Integrated tapered roller bearings allow the motor to handle significant side loads from pulleys or gears.

• Low Start-up Pressure: Precision-machined internal components allow for smooth start-ups at pressures as low as $0.5\text{ MPa}$.

• Versatile Mounting: Available with standard SAE and ISO flanges, including keyed or splined shafts to suit various transmission needs.

Application Areas

• Agricultural Equipment: Driving harvester headers and seed meters.

• Construction Machinery: Powering the rotary heads of compact drilling rigs and trenchers.

• Heavy Duty Conveyors: Reliable torque for industrial material handling and waste processing equipment.

Expert Maintenance Tips

• Case Drain Management: To protect the high-pressure shaft seal, always use a case drain line directly to the reservoir, especially if backpressure in the return line exceeds $5\text{ bar}$.

• Oil Quality: Maintain fluid cleanliness at ISO 19/17/14 to protect the precision-ground rollers within the Geroler set.

• Initial Priming: Always pre-fill the motor housing with filtered hydraulic oil through the drain port before the first run to ensure immediate lubrication of all internal moving parts.