A6VM80HA Rexroth Piston Motor Pressure Compensated Design 80cc/r
Industrial Grade
Features:
1. Advanced Digital Control Integration: Facilitates seamless
integration with modern control systems
2. High‑precision piston guide bushings
3. Low Leakage Design: Precision engineering minimizes energy loss
and leakage
4. Integrated piston traction lubrication circuit
5. Energy Saving Operation: Incorporates features to optimize
energy consumption
6. Low pulsation output
7. Modular Design: Facilitates easy system integration and
scalability
8. High‑response proportional solenoid valve
9. Enhanced Reliability: Built for long-term stable and dependable
performance
10. Pressure‑compensated control mode
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:
| Trademark | SY-Hydraulic |
| Transport Package | Standard Export Wooden Case |
| Certification | ISO9001: 2000 |
| Type | Bent axis piston motor |
| Production Capacity | 1000 pcs/month |
| HS Code | 8412299090 |
| Application | excavator, loader |
| Maximum speed | 6300 rpm |
| Delivery Time | 15-30 Days after Payment |
| Displacement | 71-250cc |
Applications:
1. In tower crane slewing systems, the balanced valve plate design
of the Rexroth A6VM hydraulic motor significantly reduces radial
loads, extending service life in continuous operation. The motor’s
rapid response time (≤100 ms) and high-response proportional
solenoid valve facilitate precise start-stop movements, while the
integrated position feedback interface enables closed-loop control
to meet the stringent positioning accuracy demands of high-altitude
construction. With built-in relief valves for system protection,
this axial piston motor ensures safe, reliable performance even
under the dynamic loads characteristic of tower crane operation.
2. In geotechnical drilling rig rotary drive units, the Rexroth
A6VM hydraulic motor offers exceptional power density and a compact
installed length to deliver consistent torque output to the drill
string, maintaining reliability in challenging conditions. Rated
for high contamination tolerance to ISO 17/15/12, this hydraulic
motor thrives in abrasive mud and dust environments, reducing
maintenance downtime and filter change intervals. With integrated
cooling line ports for easy external cooler connection, it ensures
optimal temperature management during extended drilling operations,
maximizing productivity and equipment lifespan.
3. In directional drilling rig feed drive systems, the Rexroth A6VM
axial piston motor excels with its impact load resistance and
thermal expansion compensation design, delivering steady torque
output under high-load, high-temperature conditions to ensure
efficient bit advancement. Its self-lubricating slipper material
and integrated piston traction lubrication circuit minimize
friction and wear, enhancing system reliability. Paired with a
multi-stage directional valve assembly for precise forward and
reverse switching, this hydraulic motor meets the rigorous demands
of complex geological drilling applications.
Competitive Advantage:
1. The Rexroth A6VM variable displacement hydraulic motor
integrates a matched high‑precision gear pump, ensuring minimal
internal leakage and exceptional volumetric efficiency. Its
advanced sealing system, equipped with high-temperature resistant
seals, maintains peak performance across a wide temperature range
from −40 °C to +120 °C. This robust design makes it perfect for
extreme environments—whether for forestry machinery in cold
climates, snow removal vehicles, or desert and high‑altitude
construction equipment. By delivering consistent power and
reliability, this piston motor enhances equipment uptime and
reduces maintenance intervals.
2. The Rexroth A6VM axial piston motor can be paired with
electronic control valves for closed‑loop feedback regulation,
enabling real‑time monitoring of speed and torque with precise load
response. Supporting CANopen or EtherCAT communication protocols,
it integrates seamlessly into automated control systems, elevating
the intelligence of industrial equipment. From robotics and
printing machines to high‑precision packaging systems, this
hydraulic motor delivers unmatched accuracy and
responsiveness—enhancing productivity and ensuring superior process
control in applications where motion precision is paramount.
3. The Rexroth A6VM piston motor features optimized fluid
channeling and low‑friction seals to minimize internal leakage and
energy loss, ensuring high volumetric efficiency throughout its
entire operating range. This precision engineering enables the
axial piston motor to deliver consistent torque at low to medium
speeds under heavy loads, reducing fuel consumption and operational
costs for continuous‑duty applications. From port container
handlers and concrete pump trucks to hydraulic excavators, this
variable displacement hydraulic motor maximizes productivity while
promoting sustainable, energy‑efficient performance.
The Analysis For Rexroth A6VM Piston Motor Common Breakdown:
1. In failure scenario number 4, 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.
2. In failure scenario number 5, 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.
3. In failure scenario number 6, communication interruption with
the electronic control unit (ECU) or firmware errors can prevent
the motor from operating at the programmed flow and pressure
setpoints, causing uncontrolled speed or sluggish response.
Symptoms include system alarms, unstable motion, and abnormal load
fluctuations. To address this issue, inspect communication cables,
connectors, and supply voltages, reload or update firmware, and
utilize the manufacturer’s diagnostic software to retrieve fault
codes. Rapid identification and resolution of ECU-related problems
are essential for restoring precise electronic control and
maintaining system performance.
