1. Fixed motor with axial tapered piston rotary group of bent.axis design, for hydrostatic drives in open and closed circuits.
2. For use in mobile and stationary applications.
3. The output speed is dependent on the flow of the pump and the displacement of the motor.
4. The output torque increases with the pressure differential between the high-pressure and the low-pressure side.
5. Finely graduated sizes permit far-reaching adaptation to thedrive case.
6. High power density.
7. Small dimensions.
8. High total efficiency.
9. Good starting characteristics.
10. Economical design.
11. 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		V_g	cm³	45.6	56.1	63	80.4	90	106.7	125	160.4	180
Speed maximum		n_nom	rpm	5600	5000	5000	4500	4500	4000	4000	3600	3600
Speed maximum		n_max	rpm	6200	5500	5500	5000	5000	4400	4400	4000	4000
Input flow at nnom and Vg		q_V	L/min	255	281	315	362	405	427	500	577	648
Torque at V_g and	Δp = 350 bar	T	Nm	254	313	351	448	501	594	696	893	1003
Torque at V_g and	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		J_GR	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
Maximum torque		1273 Nm
Delivery Time		15-30 Days after Payment
Displacemen		45-180cc

Applications:

1. Hydraulic swing system for excavators: 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%.

2. Drum drive for concrete mixer trucks: A2FM’s maximum torque output (3000 Nm) ensures aggregate mixing uniformity under low-speed heavy loads, with speed fluctuation rate <2%. Shock-resistant bearings withstand periodic load impacts during concrete curing. Closed-loop charge pumps maintain oil cleanliness at ISO 4406 20/18, extending oil change intervals to 2000 hours.

3. Hoisting mechanism for mobile cranes: With 92% starting torque efficiency and bidirectional rotation, A2FM achieves hook acceleration error <0.1 m/s² during heavy load lifting. Modular flange ports simplify multi-pump coordination, reducing hydraulic pipeline complexity by 30%. Enhanced seals prevent oil leakage during inclined operations, limiting system pressure fluctuations to ±5 bar.

4. Travel drive for port container cranes: Power density of 1.2 kW/kg meets high-power drive demands, achieving travel speed control accuracy of ±2% for varying container loads.

5. Cutter drive for agricultural harvesters: Wide temperature range (-40°C~+90°C) ensures continuous operation in extreme field conditions, reducing failure rates by 40%. Dust-resistant seals block straw debris ingress, extending grease replacement intervals to 1000 hours and cutting maintenance costs by 50%.

Competitive Advantage:

1. 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.

2. The integral piston ring design with double-sealing barriers resists contaminants ≤15μm, achieving 20,000-hour maintenance-free operation under NAS 1638 Class 9 oil cleanliness, drastically reducing mine equipment maintenance costs.

3. With modular flanges compliant to ISO 3019-2 and SAE J744 standards, the hydraulic motor enables rapid planetary gearbox replacement on marine deck machinery, reducing port equipment downtime by 50%.

4. 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.

5. Achieving 3.2kW/kg power density with aluminum alloy housing reduces robotic joint drive unit weight by 18% while meeting EN 15000 safety standards, enhancing agile material handling performance.

The Analysis For Rexroth A2FM Fixed Displacemen Piston Motor Common Breakdown:

1. Swashplate Angle Deviation Causes Torque Fluctuation‌: 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.

2. Piston Abnormal Wear Reduces Volumetric Efficiency‌: Over 15μm clearance between piston and cylinder under NAS 10 contaminated oil causes <85% efficiency. Restore oil to NAS 7 via offline filtration and replace hard-chrome plated pistons.

3. Scratched valve Plate Induces Pressure Pulsation‌: Metal debris (>20μm) in porting area causes >±10bar pressure ripple at 350bar. Regrind port plate to Ra0.2μm and install ≥95% efficient magnetic return filters.

4. 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.

5. Inadequate Housing Cooling Causes Oil Overheat‌:Dust accumulation (>2mm) on fins leads to >90℃ oil temperature at 300bar/50℃ ambient. Clean fins with 0.6MPa air and add auxiliary fans (≥6m/s airflow).

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