Rexroth A6VM A6VE A6V Axial Piston Variable Hydraulic Motor

The A6VM, A6VE, and A6V Series Bent-Axis Axial Piston Variable Displacement Motors (featuring high-demand specifications A6VE107HA2T, A6VM107HA1/63W-VZB37800A, A6VM28HD1/61W-VAB020B, and heavy-displacement legacies A6V250, A6V500, A6V225HD) by Chengyuan Hydraulic represent technical-grade hydraulic power units engineered for 100% direct drop-in interchangeability with global hydrostatic networks. Manufactured in strict structural allowance with Bosch Rexroth engineering blueprints (Series 61, 63, and legacy editions), this variable motor line seamlessly matches original splined shafts, metric/SAE high-pressure interfaces, mounting pilot profiles, and pilot control valves (HA high-pressure automatic or HD proportional regulators). This allows global B2B sourcing networks to replace active field machinery instantly without piping retrofits or chassis redesigns.

Operating as the variable speed and torque core for high-stress heavy-duty equipment, the A6V/A6VM motor series utilizes a bent-axis geometry that delivers an ultra-wide displacement ratio (capable of stroking from maximum capacity all the way to zero displacement) and superior breakaway start torque efficiency. Specifically, the A6VE plug-in cartridge architecture allows the motor body to be embedded directly inside mechanical planetary gearboxes, reducing installation space requirements. At Chengyuan, we eliminate operational risks by subjecting every unit to a 100% rigorous dynamic simulation test bench schedule. By mapping continuous volumetric efficiency under a 400 bar load, tracking millisecond swiveling control latency, measuring low-speed creep stability, and logging case drain thermal spikes, we ensure our replacement motors deliver original-brand reliability out of the box.

Technical Specifications

• Product Series Classification: A6VM (Standard Standard Frame) / A6VE (Plug-in Cartridge Frame) / A6V (Legacy Heavy-Displacement Frame) Bent-Axis Piston Motor

• Nominal Continuous Operating Pressure: 350 bar to 400 bar (35 – 40 MPa)

• Maximum Peak Shock Pressure: 400 bar to 450 bar (40 – 45 MPa)

• Recommended Working Media: Premium anti-wear mineral-based hydraulic oils

• Model-Specific Engineering Data (Catalog Verified):

  • Model Identification: A6VE107HA2T (Plug-In Variable Execution)

  • Maximum Geometric Displacement: 107.0 cc/rev; Cartridge flange configuration for seamless integration inside mechanical travel gearboxes; Control Code HA2: Automatic high-pressure control adjusting displacement infinitely relative to system load; Max speed at Vg max: 4150 rpm; Max speed at Vg min: 6300 rpm; Net Weight: 46.0 kg.

  • Model Identification: A6VM107HA1/63W-VZB37800A (Series 63 Standard Frame)

  • Maximum Geometric Displacement: 107.0 cc/rev; Control Code HA1: Proportional internal high-pressure adjustment that up-scales displacement automatically to deliver maximum torque as load resistance rises; W: Metric porting layout; V: Premium FKM Viton seals; Z: Standard SAE involute splined shaft; Net Weight: 50.0 kg.

  • Model Identification: A6VM28HD1/61W-VAB020B (Series 61 High-Speed Execution)

  • Maximum Geometric Displacement: 28.0 cc/rev; Control Code HD1: Hydraulic proportional control where displacement scales linearly with external pilot pressure; Max speed at Vg max: 5500 rpm; Max speed at Vg min: 8500 rpm; Net Weight: 17.0 kg.

  • Model Identifications: A6V250 / A6V500 / A6V225HD (Heavy-Duty Large Displacement Legacies)

  • Geometric Displacements: 250 cc/rev, 500 cc/rev, and 225 cc/rev respectively; Control Code HD: External hydraulic pilot pressure-dependent infinite regulation; Continuous pressure up to 350 bar; Engineered for high-load industrial lift or TBM primary drives; Net Weights: Approx 145 kg, 280 kg, and 138 kg respectively.

Key Technical Advantages

• 40° Bent-Axis Geometric Framework & High Power Density: Utilizing a 40° bent-axis design, this line achieves an exceptional displacement ratio ($V_{\text{max}}/V_{\text{min}}$). Under high rotation speeds, the centrifugal stress on the ball-headed piston subassembly is drastically lower than that of conventional swashplate designs, boosting power density by over 30% and providing smooth, step-less power transmission.

• A6VE Cartridge Plug-in Layout for Spatial Optimization: Models like the A6VE107HA2T discard standard heavy mounting brackets in favor of an integrated cartridge flange. This configuration allows the motor to slot directly inside planetary final travel gearboxes or winch drums, shortening the structural overhang by nearly 40% and simplifying complex mobile chassis architectures.

• Bi-Metal Spherical Valve Plate & Micron-Precision Lapping: The valve plate and turning cylinder block interface is machined from high-tensile wear-resistant bronze alloy fused to hardened steel, finished via advanced CNC spherical multi-axis lapping. With three-dimensional geometric tolerances held within 1-2 microns, it maintains a strong hydrostatic oil film under a continuous 400 bar load, keeping volumetric efficiency above 95%.

• Millisecond Adaptive Control Spools (HA/HD Regulators): The internal HA1/HA2 automatic high-pressure valves and HD1 proportional spools feature EDM micro-profiled metering notches. When heavy equipment hits a sudden resistance wall (triggering a system pressure spike), the control block shifts within milliseconds to up-scale displacement for maximum torque. It then destrokes back to minimum displacement during light loads to enable fast travel and maximize energy savings.

Application Areas

With their wide调速 bandwidth, high breakaway torque, and extreme pressure ratings, the A6VM/A6VE/A6V variable motor series excels across heavy-duty industrial stationary systems and rugged mobile machinery:

• Off-Highway Crawler Final Travel Drives: Track propulsion systems for 30-to-80 ton heavy excavators, rotary piling rigs, and heavy-duty diaphragm wall grabs (integrating with planetary drives via the embedded A6VE107HA2T).

• Heavy Marine Deck & Mobile Crane Winch Systems: Main/auxiliary hoisting drums for multi-ton crawler cranes, industrial mooring winches, marine anchor windlasses, and offshore oil platform winch drum configurations.

• Heavy Tunnel Boring & Mining Machinery: Cutter-head primary drives for tunnel boring machines (TBM), heavy-duty traction mechanisms for underground continuous continuous miners, and heavy metallurgical conveyor systems.

Expert Maintenance Tips

• Mandatory Pre-Commissioning Casing Priming and Air Purging: Prior to initial startup or reactivation after a system flush, the motor housing must be fully filled with clean, filtered hydraulic oil through the highest case drain port. Please note: on the plug-in A6VE series embedded inside gearboxes, this port can be hard to reach. Never run the motor bone-dry; doing so will cause dry-friction galling and seize the rotating subassembly within 5 seconds.

• Maintain Continuous Case Drain Back-Pressure Below 2 bar: The case drain line must run independently and directly back into the fluid reservoir without restriction. Never route it through return filters or combine it with main system return lines. Ensure continuous case pressure remains $\le 2$ bar to prevent shaft lip seal failure, internal pressure imbalances, and premature piston socket wear.

• Rigidly Monitor Closed-Loop Hydrostatic Charge Pressures: When integrated into closed loops (such as heavy hoisting or high-speed travel grids), the circuit must maintain a stable charge pressure (typically 18 bar to 25 bar) during high-frequency reversal or hard deceleration. This prevents sudden fluid evacuation from causing destructive cavitation on the cylinder face and spherical valve plate.