Rexroth A6VM Series Piston Motor | A6VM107 A6VM160 A6VM200 | Variable Displacement Hydraulic Motor

The A6VM Series axial piston variable motors by Chengyuan Hydraulic are premium, heavy-duty components fully compatible with Rexroth 63 & 65 series standards. Utilizing the proven bent-axis design, these motors are engineered for both open and closed-circuit hydrostatic drives. Specific models such as A6VM107HA2T (High-pressure automatic control) and A6VM200EP6D (Electric proportional control) undergo 100% simulated load testing. With an exceptionally wide displacement ratio, A6VM motors bridge the gap between high-torque starting and high-speed operation. Designed as a high-fidelity replacement, Chengyuan A6VM units offer 100% original-place interchangeability regarding mounting dimensions and performance parameters.

Technical Specifications :

• Core Models: A6VM55, A6VM80, A6VM107, A6VM160, A6VM200, A6VM250

• Displacement Range: $55\text{ cc/rev}$ to $250\text{ cc/rev}$

• Nominal Pressure: $40\text{ MPa (400 bar / 5800 psi)}$

• Peak Pressure: $45\text{ MPa (450 bar / 6525 psi)}$

• Maximum Speed: Up to $5000\text{ rpm}$ (Subject to size and swing angle)

• Control Types: HA (High Pressure), EP (Electric Proportional), HD (Hydraulic Direct), HZ (Two-point)

• Seals: High-grade FKM as standard for temperature and pressure resistance

• Housing: High-strength ductile iron for superior vibration damping

Key Technical Advantages:

• Wide Displacement Ratio: The bent-axis geometry allows the displacement to vary from maximum to nearly zero. This provides a wide range of speeds without needing mechanical gear shifts, significantly improving machine cycle times.

• Optimized Rotating Group: Featuring a spherical valve plate, the motor ensures perfect sealing for pistons even at high rotational speeds. Coupled with heavy-duty bearings, it maintains high volumetric efficiency under frequent reversing pulses.

• Precision Control Response: Our HA and EP control units are fine-tuned for minimal hysteresis. This ensures that the motor adjusts displacement instantaneously during load transients, maintaining system stability and preventing pressure spikes.

• Superior Power-to-Weight Ratio: The compact design allows the A6VM to deliver massive power output in a small envelope, making it ideal for the cramped installation spaces found in modern mobile machinery.

Application Areas:

• Travel Drives: Track and wheel drives for excavators, drilling rigs, and mobile cranes.

• Winch Systems: Marine winches, hoisting gear, and material handling equipment.

• Industrial Drives: Mixers, shredders, and applications requiring high starting torque and variable speed ranges.

Expert Maintenance Tips:

• Case Drain Management: Before operation, the motor case MUST be filled with clean hydraulic oil through the highest drain port. The drain line must lead directly to the tank with backpressure never exceeding $2\text{ bar}$.

• Displacement Limit Setting: When using EP or HD controls, verify that the minimum displacement stop-bolt is correctly set and locked to prevent the motor from overspeeding beyond its mechanical limits.

• Fluid Cleanliness: Proportional control motors are sensitive to contamination. We recommend maintaining oil cleanliness at NAS Class 8 or better and replacing return filters regularly to protect the precision valve plate surfaces.