High-Efficiency A2FM Rexroth Piston Motor for Construction
Machinery 180cm³ Cast Steel
Features:
1. Bent-axis design featuring axial tapered pistons
2. Fixed displacement motor configuration for hydrostatic drives
3. Compatible with both open and closed hydraulic circuits
4. Designed for mobile applications
5. Engineered for stationary applications
6. Output speed directly proportional to motor flow
7. Adjustable output speed via displacement settings
8. Torque output increases with pressure differential
9. High power density
10. Compact design for space-saving integration
Technical data:
| Size | NG | 45 | 56 | 63 | 80 | 90 | 107 | 125 | 160 | 180 |
| Displacement geometric, per revolution | Vg | cm3 | 45.6 | 56.1 | 63 | 80.4 | 90 | 106.7 | 125 | 160.4 | 180 |
| Speed maximum | nnom | rpm | 5600 | 5000 | 5000 | 4500 | 4500 | 4000 | 4000 | 3600 | 3600 |
| nmax | rpm | 6200 | 5500 | 5500 | 5000 | 5000 | 4400 | 4400 | 4000 | 4000 |
| Input flow at nnom and Vg | qV | L/min | 255 | 281 | 315 | 362 | 405 | 427 | 500 | 577 | 648 |
Torque
at Vg and | Δp = 350 bar | T | Nm | 254 | 313 | 351 | 448 | 501 | 594 | 696 | 893 | 1003 |
| Δp = 400 bar | T | Nm | 290 | 357 | 401 | 512 | 573 | 679 | 796 | 1021 | 1146 |
| Rotary stiffness | c | kNm/rad | 4.18 | 5.94 | 6.25 | 8.73 | 9.14 | 11.2 | 11.9 | 17.4 | 18.2 |
| Moment of inertia for rotary group | JGR | kgm2 | 0.0024 | 0.0042 | 0.0042 | 0.0072 | 0.0072 | 0.0116 | 0.0116 | 0.022 | 0.022 |
| Maximum angular acceleration | a | rad/s2 | 14600 | 7500 | 7500 | 6000 | 6000 | 4500 | 4500 | 3500 | 3500 |
| Case volume | V | L | 0.33 | 0.45 | 0.45 | 0.55 | 0.55 | 0.8 | 0.8 | 1.1 | 1.1 |
| Mass (approx.) | m | kg | 13.5 | 18 | 18 | 23 | 23 | 32 | 32 | 45 | 45 |
Specifications:
| Warranty | 1 Year |
| Transport Package | Standard Export Wooden Case |
| Structure | Axial Plunger motor |
| Type | Mobile machinery piston motor |
| Production Capacity | 2000-3000 pcs/month |
| HS Code | 8412299090 |
| Application | Mobile crane, Combine Harvester, Concrete mixer truck |
| Maximum speed | 3600rpm |
| Delivery Time | 15-30 Days after Payment |
| Displacemen | 45-180cc |
Applications:
1. In modern construction machinery, the A2FM bent‐axis axial
piston motor delivers exceptional performance with its high power
density and compact design. Integrated with a piston motor, it provides rapid start‐up and precise control for heavy‐duty
tasks such as excavation, lifting, and material transport. The
advanced design ensures durability and reliable operation, while
optimized flow paths and low internal leakage enhance efficiency.
Furthermore, its economical build minimizes maintenance costs,
making it ideal for demanding construction environments, reliably.
2. In construction machinery applications, the A2FM motor stands
out for its precise control and high efficiency under heavy
workloads. Coupled with an axial piston motor, it delivers smooth power conversion and rapid response for
equipment such as excavators and cranes. Its advanced bent‐axis
design and compact build ensure consistent performance even under
extreme conditions. Optimized for reliability and reduced
maintenance, this motor significantly enhances operational safety
and productivity on busy construction sites, guaranteeing unmatched
efficiency every day.
3. The bent-axis design and 450 bar intermittent pressure output
enable A2FM to provide dynamic torque compensation during frequent
start-stop cycles on excavator swing platforms. Its compact axial
length (20% shorter) fits confined spaces, reducing pressure loss
from pipeline bending. Modular SAE flange ports allow rapid
replacement, cutting maintenance downtime by over 30%.
Competitive Advantage:
1. The A2FM motor offers unmatched performance due to its advanced
bent‐axis design, high power density, and compact construction,
which ensures superior efficiency and reliability when paired with
a piston motor, delivering rapid response, precise control, and optimal energy
conversion for diverse hydraulic applications in demanding
industrial environments, ensuring continuous excellence.
2. The A2FM motor delivers exceptional durability and performance
with its robust bent‐axis design, ensuring reliable operation and
minimal maintenance requirements, while paired with an axial piston motorit optimizes hydraulic flow, reduces energy losses, and provides
superior torque output for demanding industrial applications,
promoting enhanced productivity and operational longevity
remarkably.
3. The bent-axis axial piston motor utilizes 40° angular alignment
to optimize torque transmission paths, with rigid piston-driveshaft
connections maintaining 95% mechanical efficiency under 450bar peak
pressure, ideal for heavy-duty start-stop applications like
concrete mixer drum drives.
The Analysis For Rexroth A2FM Fixed Displacemen Piston Motor Common
Breakdown:
1. During prolonged operation, the A2FM motor may suffer internal
leakage due to contaminated hydraulic oil, aging seals, or improper
installation, resulting in unstable pressure, reduced power output,
and increased temperature. The fault often causes abnormal
vibration and noise, requiring inspection of the hydraulic motor, cleaning, and seal replacement to restore stability.
2. Under heavy load or prolonged use, the A2FM motor may experience
overheating that accelerates internal wear and oil degradation,
resulting in performance loss and system failure. It is critical to
inspect the cooling system, improve ventilation, and maintain an
axial piston motor with proper hydraulic oil to control operating temperatures.
3. Spring preload reduction or foreign object jamming in variable
mechanism leads to swashplate angle deviation. Symptoms include
>±5% torque fluctuation under constant pressure. Solution
involves disassembling piston chamber, replacing 50μm orifice
filters, and recalibrating neutral sensor.
