Rexroth A6VM107 A6VM160 Hydraulic Axial Piston Motor

The A6VM Series Bent-Axis Axial Piston Variable Displacement Motors (including distinct precision-engineered model configurations A6VM107HA2/63W-VZB, A6VM160HA2/63W, and A6VM107HA1X/63W-VSD51000A-S) by Chengyuan Hydraulic represent heavy-duty aftermarket power units engineered for 100% direct drop-in interchangeability with global standard mobile and stationary machinery. Manufactured in absolute conformity with Rexroth 63 series official engineering blueprints, these variable motors match original technical output splines, standard SAE high-pressure interfaces, mounting pilot flanges, and HA control hydraulics. This ensures B2B global equipment fleets can conduct immediate on-site swaps without structural layout rework or control manifold modifications.

Functioning as the high-torque, wide-bandwidth speed regulator for hydrostatic transmission systems, the A6VM series is globally revered for its 400 bar continuous operating capability, optimized power-to-weight geometry, and excellent low-speed lugging behavior. At Chengyuan, zero compromises are tolerated; every single A6VM motor clears our 100% rigorous digital simulation test bench matrix. By measuring micro-case drain internal leakage, control hysteresis curves across the variable swashplate displacement angle, and output torque consistency at peak thermal levels, we ensure our motors mirror OEM-level operational precision and structural longevity.

Technical Specifications

• Product Series Classification: A6VM Bent-Axis Axial Piston Variable Motor (Series 63)

• Circuit Configurations: Universally compatible with both Open and Closed Loop hydrostatic networks

• Sealing Matrix: V (Premium FKM Viton seals, optimized for high-temperature and extreme shaft shear stress)

• Control Method: HA Automatic High-Pressure Control (无级 variable displacement regulated automatically by operational load pressure)

• Model-Specific Engineering Data (Catalog Verified):

  • Model Code: A6VM107HA2/63W-VZB

  • Maximum Geometrical Displacement (Vg max): 107.0 cc/rev ($cm^3/rev$)

  • Minimum Geometrical Displacement (Vg min): Fully adjustable (factory standard set at 0 cc or 20% of max)

  • Nominal Continuous Operating Pressure: 400 bar (40 MPa)

  • Maximum Peak Shock Pressure: 450 bar (45 MPa)

  • Maximum Rotational Speed (at Vg max): 4150 rpm

  • Maximum Rotational Speed (at Vg min): 6300 rpm

  • Control Configuration HA2: Pressure-related automatic adaptation via internal or external pilot tracking lines

  • Drive Shaft Specification: Z (SAE standard involute splined shaft)

  • Net Physical Weight: Approx 50.0 kg

  • Model Code: A6VM160HA2/63W

  • Maximum Geometrical Displacement (Vg max): 160.0 cc/rev ($cm^3/rev$)

  • Nominal Continuous Operating Pressure: 400 bar (40 MPa)

  • Maximum Peak Shock Pressure: 450 bar (45 MPa)

  • Maximum Rotational Speed (at Vg max): 3600 rpm

  • Maximum Rotational Speed (at Vg min): 5500 rpm

  • Control Configuration HA2: Automatic displacement up-scaling linked with circuit pressure hikes to boost load torque

  • Drive Shaft Specification: Standard heavy-duty splined drive

  • Net Physical Weight: Approx 74.0 kg

  • Model Code: A6VM107HA1X/63W-VSD51000A-S

  • Maximum Geometrical Displacement (Vg max): 107.0 cc/rev ($cm^3/rev$)

  • Continuous Working Pressure: 400 bar; Peak Pressure Limit: 450 bar

  • Control Configuration HA1: Automatic high-pressure control with an internal pilot channel (no external pilot supply required)

  • Special Hardware Integration VSD51000A-S: Built-in electronic digital speed sensor for close-tolerance rpm tracking and closed-loop controller (ECU) data routing

  • Net Physical Weight: Approx 51.5 kg

Key Technical Advantages

• 40° Bent-Axis Geometric Layout & High Power Density: Features a 40° bent-axis design that achieves a high displacement ratio. Compared to standard swashplate motors, the ball-headed pistons experience reduced centrifugal loading at maximum rpm, allowing a 30% jump in overall power density and higher speed capabilities.

• Bi-Metal Valve Plate Technology for Minimum Volumetric Decay: The cylinder-to-valve-plate running surfaces are processed from high-tensile wear-resistant bronze alloy fused to hardened carbon steel, finished with micro-inch CNC flat-lapping. This maintains a steady hydro-mechanical fluid film under a continuous 400 bar load, securing a 96% volumetric efficiency and keeping case temperature spikes low.

• Adaptive High-Response HA Control Logic: The integrated automatic pressure override valves (HA1/HA2) exhibit highly responsive tracking dynamics. When a heavy-duty mobile asset or industrial winch encounters a sudden resistance spike, the control cartridge adjusts in milliseconds, swiveling the motor toward maximum displacement to multiply torque and prevent stalling.

• Closed-Loop Digital VSD Speed Sensing Diagnostics: The integrated VSD sensor option on the A6VM107HA1X layout provides reliable rotational speed tracking across the entire rpm curve. This sensor routes real-time telemetry to the system controller (ECU), enabling advanced anti-slip control, synchronized multi-axis tracking, and smooth cruise propulsion.

Application Areas

The A6VM variable motor series excels in heavy-duty off-highway propulsion and crane winch applications requiring massive torque variance and reliable high-speed operation:

• Heavy Construction Crawlers & Rotary Drilling Rigs: Heavy tracked excavator final travel drives, pile driving rigs, and track propulsion units for multi-ton specialty cranes.

• Heavy Industrial Lift & Marine Offshore Winches: Main and auxiliary hoisting drums for crawler cranes, heavy-duty cargo winch assemblies, marine deck anchoring, and subsea umbilical reel spooling.

• Road Construction Machinery & Mining Assets: High-power asphalt cold milling drum drives, underground tunnel boring machine (TBM) cutter-head circuits, and heavy-duty static airport tow tractor drives.

Expert Maintenance Tips

• Mandatory Pre-Commissioning Casing Submersion: Because bent-axis architectures rely on immediate internal lubrication, the motor housing must be pre-filled with clean, filtered hydraulic oil through the highest case drain port prior to initial startup. Rotate the shaft manually several times to ensure the high-angle ball joints and bearings are fully coated, preventing dry-start galling.

• Keep Case Drain Back-Pressure Within Standard Tolerances: The case drain line must be plumbed independently and run directly back to the reservoir without combining with main return manifolds. Ensure continuous case back-pressure remains $\le 2$ bar. Excessive case pressure will cause shaft lip seal failure, internal imbalance, and premature piston socket wear.

• Eliminate Trapped Air to Prevent Low-Speed Stick-Slip: If the motor experiences stick-slip or micro-shuddering during low-speed ($<50\,\text{rpm}$), low-displacement operation, air may be trapped in the system. Regularly bleed the hydraulic system using the dedicated air-release valves and maintain stable charge pump pressure to ensure consistent operation.