Rexroth Piston Motor A6VM 450 Bar Pressure for Mobile Hydraulics
Features:
1. Variable motor with axial tapered piston rotary group of bent
axis design, for hydrostatic drives in open and closed circuits.
2. Stepless variable displacement design
3. The wide control range enables the variable motor to satisfy the
requirement for high speed and high torque.
4. Swashplate angle adjustment mechanism
5. The output speed is dependent on the flow of the pump and the
displacement of the motor.
6. High power density
7. Wide control range with hydrostatic transmission.
8. Axial piston configuration
9. Cost savings through elimination of gear shifts and
possibilityof using smaller pumps
10. Balanced valve plate
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 |
Model | SY-A6VM |
Place of Origin | China |
Type | Rexroth type piston motor |
Color | Available any color |
HS Code | 8412299090 |
Application | excavator, loader, construction machinery |
| Max Speed | 6300 rpm |
Delivery Time | 15-30 Days after Payment |
MOQ | 1 Piece |
Applications:
1. In heavy earthmoving applications such as large excavators, the
Rexroth A6VM series piston motor leverages its stepless variable
displacement design and efficient internal leakage control to
deliver pinpoint accuracy in pushing and digging functions.
Operating reliably at pressures up to 350 bar, the hydraulic motor
maintains exceptionally low output pulsation, resulting in smooth,
vibration-free performance that enhances operational productivity
and operator comfort. Featuring tungsten carbide valve plate
surfaces and precision-machined piston guide bushings, this axial
piston motor offers unparalleled durability and minimizes downtime
for maintenance, ensuring consistent performance under continuous
heavy-duty loads.
2. In crawler bulldozer powertrain installations, the Rexroth A6VM
axial piston motor excels with its high starting torque and
cavitation-resistant chamber design, providing dependable
maneuverability and precise positioning across varying terrains,
from soft soil to compacted earth. The modular flange mounting and
integrated relief/bypass valves enable seamless integration into
existing hydraulic circuits, while safeguarding system integrity
under overload conditions without sacrificing control
responsiveness. This hydraulic motor’s ability to deliver peak
performance under fluctuating loads makes it an ideal choice for
demanding earthmoving deployments, maximizing uptime and fuel
efficiency.
3. In gantry crane slewing drive applications, the Rexroth A6VM
series piston motor features dual-side bearing support and a
high-rigidity drive shaft to deliver smooth and secure 360-degree
continuous rotation. Its load-sensing interface combined with
pressure-compensated control maintains precise speed and
positioning in response to varying load demands, dynamically
adjusting flow rates for optimal energy efficiency. The low-noise
operation of this axial piston motor is especially valuable in port
terminals and industrial warehouses, minimizing acoustic
disturbance and enhancing workplace comfort without sacrificing
lifting performance or reliability.
Competitive Advantage:
1. The Rexroth A6VM axial piston motor features
precision-engineered bearings and high-strength alloy steel
components, delivering exceptional wear resistance and durability
even under the most demanding conditions. Its internal hydrostatic
balancing design reduces vibration and operational noise, ensuring
enhanced comfort and safety. Ideal for heavy-duty applications such
as construction machinery, mining equipment, and bridge erection,
this piston motor combines robust performance with long service
life—making it a superior choice for industries requiring reliable
power transmission and minimal downtime.
2. The Rexroth A6VM piston motor delivers high power density and
infinitely variable displacement, allowing compact installation
while providing substantial torque output for precise motion
control. Its integrated pressure compensation valve automatically
adjusts flow to maintain consistent performance, making it ideal
for applications requiring smooth start‑stop operations and
variable speed control. From excavators and cranes to port handling
machinery, this hydraulic motor offers seamless adaptability,
improved efficiency, and reduced energy consumption—aligning
perfectly with modern requirements for dynamic industrial
automation solutions.
3. The Rexroth A6VM axial piston motor, featuring a dual‑row piston
arrangement and optimized flow channels, is capable of handling a
rated pressure up to 512 bar and maximum speeds of 2000 rpm. This
high‑performance variable displacement motor meets demanding
requirements for both power and speed in heavy‑duty applications.
Its compact design minimizes footprint, offering greater
flexibility in equipment integration. Widely used in oil drilling
rigs, tunnel boring machines, and steel manufacturing, this axial
piston motor ensures reliable operation under extreme conditions
and contributes to increased operational uptime.
The Analysis For Rexroth A6VM Piston Motor Common Breakdown:
1. In failure scenario number 1, the A6VM axial piston motor may
experience internal leakage and pressure drop caused by worn seals,
insufficient lubrication, or contaminated hydraulic fluid. This
fault can lead to reduced torque output and rotational speed,
thereby compromising overall system efficiency and potentially
resulting in increased vibration and operational noise. It is
recommended to inspect and replace all seal elements, flush and
replace the hydraulic oil according to the manufacturer’s
specifications, and verify the condition of filters and the cooling
system to restore optimal performance and extend service life.
During reassembly and maintenance, technicians should strictly
follow the manufacturer’s prescribed torque values and installation
sequence to prevent secondary leakage.
2. In failure scenario number 2, unstable pressure circuits may
form inside the A6VM axial piston motor due to leakage on the
high-pressure side or blocked return oil passages, resulting in
flow fluctuations and motor slipping. Symptoms include operational
jerking, intermittent torque loss, and sluggish system response. To
troubleshoot, inspect the high-pressure lines and return oil pipes
for blockages or restrictions, clean or replace clogged pipelines
and filter elements, and verify that the settings of hydraulic
control valves and relief valves meet the manufacturer’s
specifications. Proper restoration of pressure balance is essential
for smooth and reliable motor operation.
3. In failure scenario number 3, 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.
