Iron Steel Rexroth Piston Motor 400 Bar for Industrial Machinery
Applications
Features:
1. Bent-axis design with axial tapered piston rotary group
2. Suitable for hydrostatic drives in open and closed circuits
3. Output speed dependent on motor flow and motor displacement
4. Output torque increases with pressure differential and
displacement
5. Finely graduated displacement sizes for diverse drive
requirements
6. High power density with compact dimensions
7. High total efficiency (optimized volumetric and mechanical
efficiency)
8. Superior starting torque characteristics
9. Economical design reducing lifecycle costs
10. One-piece tapered piston with piston rings for sealing
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 | 12 months |
| Transport Package | Standard Export Wooden Case |
| Certification | ISO9001: 2000 |
| Type | Construction machinery piston motor |
| Production Capacity | 2000-3000 pcs/month |
| HS Code | 8412299090 |
| Application | Aerial work platform, road roller, Crawler Crane |
| Maximum torque | 1003Nm |
| Delivery Time | 15-30 Days after Payment |
| Displacement | 45-180cc |
Applications:
1. In construction cranes, the A2FM motor offers high torque output
and excellent starting performance essential for reliable lifting
operations. Integrated with a piston motor, the system provides fast response and optimized flow, ensuring
precise control under heavy loads. Its advanced bent‐axis design
and compact build enhance durability and efficiency, enabling safe
and accurate positioning of heavy loads. This robust hydraulic
solution significantly improves operational safety and overall
productivity in demanding construction environments, ensuring
superior overall performance and lasting long-term reliability.
2. In crane operations, the A2FM motor delivers precise hydraulic
control and efficient power, making it indispensable for heavy
lifting tasks. Paired with an axial piston motor, it achieves smooth acceleration and exact regulation under
fluctuating loads. Its innovative bent‐axis design and integrated
piston structure reduce energy consumption and minimize vibration,
thereby enhancing operational safety. This robust hydraulic
solution is essential for modern construction projects, ensuring
consistent performance and improved productivity in challenging
lifting applications, delivering exceptional performance with
consistently unmatched operational reliability.
3. For excavator slewing mechanisms, the A2FM motor achieves
precise 15rpm rotation control with 45MPa pressure resistance and
integrated piston seals. Over 85% starting torque efficiency
overcomes inertial loads on slopes, while modular design enables
rapid integration of pressure compensation valves, reducing
start-stop shocks by 40% and improving multi-function coordination.
Competitive Advantage:
1. With a modular design that simplifies installation and
maintenance, the A2FM motor offers flexible integration into
various hydraulic systems, and when combined with an axial piston motor, it ensures minimal downtime and efficient serviceability,
ultimately reducing operational disruptions and providing
dependable performance in dynamic industrial environments, ensuring
maximum uptime always.
2. The A2FM motor is engineered to exhibit remarkably low internal
leakage, ensuring maximum hydraulic efficiency and stable pressure
performance, and when paired with a hydraulic motor, it maintains consistent flow characteristics under variable
conditions, ultimately enhancing system reliability and minimizing
energy waste in critical industrial applications, ensuring superior
operational efficiency.
3. Equipped with temperature-compensation valves, the axial piston
motor automatically adjusts oil viscosity from -40℃ to +80℃,
maintaining ≤±2% torque stability for wind turbine pitch systems in
polar conditions.
The Analysis For Rexroth A2FM Fixed Displacemen Piston Motor Common
Breakdown:
1. Seal failure is a common issue in the A2FM motor, often caused
by prolonged high-temperature operation, oil contamination, or
mechanical wear, resulting in leakage and pressure loss.
Compromised seals reduce energy conversion efficiency. Prompt
replacement and inspection of the axial piston motor seals are recommended to restore performance.
2. Contaminated hydraulic oil can increase internal wear, damage
seals, and raise flow resistance, adversely affecting the A2FM
motor’s efficiency and output stability. Polluted oil accelerates
component degradation and failure. Regular oil replacement, system
cleaning, and maintenance of the piston motor are essential to ensure pure fluid quality and reliable
performance.
3. Excessive Bearing Clearance Triggers Mechanical Vibration:
Conical roller bearing clearance >0.08mm causes >5m/s² radial
vibration. Adjust preload to 120-150N·m with hydraulic tensioner
and relubricate with NLGI 2 grease.
