A6VM140 Rexroth Axial Piston Motor Proportional Valve Control
455L/min Flow Rate
Features:
1. Axial tapered piston rotary group with bent-axis design
2. Axial force‑balanced design
3. Infinitely adjustable displacement from Vg max to Vg min=0
4. Radial force‑balanced design
5. Torque increases linearly with pressure differential and
displacement
6. Rapid response time (≤100 ms)
7. High power-to-weight ratio design
8. High starting torque
9. Low inertia moment characteristic
10. Low‑noise operation
Technical data:
| Size | NG | 80 | 107 | 140 | 160 | 200 | 250 |
| Geometric displacement, per revolution | Vg max | cm3 | 80 | 107 | 140 | 160 | 200 | 250 |
| Vg min | cm3 | 0 | 0 | 0 | 0 | 0 | 0 |
| Vg x | cm3 | 51 | 68 | 88 | 61 | 76 | 205 |
| Maximum rotational speed(while adhering to the maximum permissible
inlet flow) | at Vg max | nnom | rpm | 3900 | 3550 | 3250 | 3100 | 2900 | 2700 |
| at Vg < Vg x | nmax | rpm | 6150 | 5600 | 5150 | 4900 | 4600 | 3300 |
| where Vg 0 | nmax | rpm | 7350 | 6300 | 5750 | 5500 | 5100 | 3300 |
| Inlet flow | at nnom and Vg max | qv max | l/min | 312 | 380 | 455 | 496 | 580 | 675 |
| Torque | at Vg max and Δp = 400 bar | T | Nm | 509 | 681 | 891 | 1019 | 1273 | ‒ |
| at Vg max and Δp = 350 bar | T | Nm | 446 | 596 | 778 | 891 | 1114 | 1391 |
| Rotary stiffness | Vg max to Vg/2 | cmin | kNm/rad | 16 | 21 | 34 | 35 | 44 | 60 |
| Vg/2 to 0 (interpolated) | cmin | kNm/rad | 48 | 65 | 93 | 105 | 130 | 181 |
| Moment of inertia for rotary group | JTW | kgm2 | 0,008 | 0.0127 | 0.0207 | 0.0253 | 0.0353 | 0,061 |
| Maximum angular acceleration | α | rad/s² | 24000 | 19000 | 11000 | 11000 | 11000 | 10000 |
| Case volume | V | l | 1.2 | 1.5 | 1.8 | 2.4 | 2.7 | 3 |
| Weight approx. | m | kg | 36 | 46 | 61 | 62 | 78 | 100 |
Specifications:
| Warranty | 1 Year |
| Specification | SY-A6VM |
| Place of Origin | China |
| Type | Rexroth axial piston motor |
| Color | Available any color |
| HS Code | 8412299090 |
| Application | excavator, loader, construction machinery |
| Maximum pressure | 450 bar |
| Delivery Time | 15-30 Days after Payment |
| Displacement | 80-250 cm3 |
Applications:
1. In container handling equipment at port terminals, the Rexroth
A6VM hydraulic motor utilizes its load-sensing interface and high
starting torque to execute precise lifting and lateral movement of
heavy containers. Its compact installation length and
OEM-compatible design enable swift replacement of legacy units,
minimizing downtime. Integrated filter mounting interfaces and
self-lubricating slipper materials reduce maintenance intervals and
extend service life, enhancing throughput in high-volume cargo
operations.
2. In the powertrain of modern tractors, the Rexroth A6VM axial
piston motor delivers precise speed control and robust torque
output for tilling, seeding, and harvesting operations through its
high power density and pressure-compensated control mode. This
piston motor handles challenging soil conditions by leveraging
self‑lubricating slipper materials and precision piston guide
bushings to maintain controlled oil temperature and minimal wear
during extended continuous use. The integrated load‑sensing
interface dynamically adjusts flow rate to tractor load demands,
optimizing fuel efficiency while boosting agricultural machinery
productivity and operational reliability.
3. In combine harvester header drives, the Rexroth A6VM hydraulic
motor offers high starting torque and low pulsation output,
ensuring smooth start‑stop operations when pulling heavy crop
yields. This hydraulic motor’s integrated relief and bypass valves
rapidly redirect flow under sudden blockages or overloads to
protect system integrity. Coupled with an optional electronic
control unit (ECU) for remote monitoring and parameter tuning, this
piston motor empowers precision agriculture with optimized
performance and predictive maintenance capabilities.
Competitive Advantage:
1. Featuring a modular electronic control unit (ECU), the Rexroth
A6VM axial piston motor delivers precise flow and pressure
regulation with remote monitoring and diagnostics capabilities. The
ECU provides real‑time performance data, alerts for potential
faults, and supports firmware updates over the network, ensuring
optimal motor operation over its lifecycle. This intelligent
hydraulic motor is particularly well‑suited for automated
production lines, AGV vehicles, and smart warehousing systems,
where predictive maintenance and seamless integration drive
productivity and minimize unplanned downtime.
2. Manufactured using lead‑free environmental processes and
anaerobic coating technology, the Rexroth A6VM piston motor meets
international ecological standards and enhances component fatigue
and corrosion resistance. Its specialized material and coating
combination withstand harsh marine environments and rigorous
salt‑spray tests, making this axial piston motor ideal for offshore
wind turbines, port cranes, and marine construction platforms. By
ensuring long-term reliability in highly corrosive conditions, this
hydraulic motor reduces maintenance costs and maximizes operational
availability.
3. The Rexroth A6VM axial piston motor is equipped with dual
mechanical seals and a backup sealing system that automatically
engages upon primary seal failure to prevent fluid leaks and ensure
operational safety. This redundancy minimizes environmental
contamination risks and reduces maintenance complexity.
Particularly suited for high‑safety applications such as pipeline
pigging in the petrochemical industry, offshore drilling platforms,
and land drilling rigs, this hydraulic motor’s fail-safe design
upholds stringent reliability and safety standards in critical
operations.
The Analysis For Rexroth A6VM Piston Motor Common Breakdown:
1. In failure scenario number 13, excessive hydraulic oil
temperature or a malfunctioning cooling system can cause the fluid
to exceed permissible temperature thresholds, accelerating seal
degradation, reducing lubrication effectiveness, and damaging
bearings. This fault typically results in increased noise, reduced
output power, and shortened component lifespan. Recommended
corrective actions include inspecting the coolant circuit for
blockages, cleaning or replacing the oil cooler, calibrating
thermal sensors, and selecting hydraulic oil grade that matches the
manufacturer’s viscosity requirements to maintain oil temperature
within allowable limits and prevent thermal degradation of motor
performance. When replacing the oil, perform thorough flushing
procedures to avoid residual contaminants in the system.
2. In failure scenario number 14, excessive particulate
contamination or moisture in the hydraulic oil can accelerate metal
surface wear and internal corrosion, leading to increased
clearances and performance degradation. Symptoms include unstable
torque output, low-speed surges, and reduced control precision.
Troubleshooting steps involve using inline moisture sensors and
particle counters to assess oil quality; if contamination
thresholds are exceeded, replace the hydraulic fluid, install
high-efficiency filter elements, and thoroughly clean the reservoir
and filters. Restoring fluid cleanliness is critical for
maintaining motor longevity and precise control performance.
Additionally, implement regular oil monitoring schedules to prevent
recurrence of contamination-related faults.
3. In failure scenario number 15, cavitation or insufficient return
line pressure can cause air bubbles to be drawn into the A6VM axial
piston motor, resulting in instantaneous power loss and shock
loading that can damage vanes and cylinder bores. This fault
manifests as abnormal operating noise, sudden performance drop, and
system vibration. Recommended corrective measures include
inspecting the suction lines for proper vacuum levels, eliminating
any leaks, verifying adequate reservoir back-pressure, and if
necessary installing vent valves or increasing return line damping
to prevent air ingress and ensure continuous, stable fluid supply.
Additionally, check reservoir height and return port positioning to
optimize system layout and further reduce cavitation risk.
