Rexroth A2FM Series Piston Motor | A2FM32 A2FM107 A2FM180 | High Pressure Hydraulic Motor

The A2FM Series fixed displacement bent-axis piston motors from Chengyuan Hydraulic are high-performance driving components fully compatible with Rexroth Series 61 standards. Featuring a 40° bent-axis design, these motors deliver exceptional mechanical and volumetric efficiency. For flagship models like A2FM107/61W-VBB010 and A2FM180/61W-VAB027, we utilize reinforced ductile iron cylinders and wear-resistant piston coatings. Every A2FM motor undergoes 100% full-load efficiency testing under simulated conditions to ensure starting torque and performance match OEM specifications, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series Model: A2FM Series (Bent-axis Fixed Motor)

• Displacement Sizes (cm³/rev): 5 to 250 (Full range including A2FM32, A2FM107, A2FM180)

• Nominal Pressure: 400 bar (40 MPa)

• Peak Pressure: 450 bar (45 MPa)

• Maximum Speed: Up to 8000 rpm (depending on displacement)

• Control Type: Fixed Displacement

• Mounting Interface: ISO 7653 compliant flanges and shafts

• Standard Configuration: Series 61, available with NBR or Viton (V) seals

Key Technical Advantages:

• 40° Bent-Axis Geometry: The A2FM utilizes high-angle technology to provide a high power-to-weight ratio. This structure ensures robust torque output even at low speeds, outperforming traditional swash-plate designs.

• Reinforced Tapered Roller Bearings: To handle the radial loads common in track drives and winches, our A2FM motors are equipped with high-load capacity bearings, significantly extending B10 bearing life in harsh environments.

• Spherical Valve Plate Precision: The cylinder-to-valve plate interface features a spherical design. High-precision grinding ensures perfect self-centering and thermal stability, preventing internal leakage during sudden pressure spikes.

• Optimized Piston-Slipper Pair: Pistons feature specialized hydraulic support and nitrided surfaces to minimize sliding friction. This maintains mechanical efficiency above 95%, significantly reducing total system energy consumption.

Application Areas:

• Construction Machinery: Excavator swing drives, tunnel boring machines, and road roller travel motors.

• Agricultural Equipment: Harvester header drives and seeder hydraulic systems.

• Industrial Applications: Winch hoist motors, mixer drum drives, and injection molding pre-plasticizing.

Expert Maintenance Tips:

• Case Drain Pressure Management: A2FM motors must have a dedicated drain line. Ensure the case pressure does not exceed 2 bar, as excessive pressure will lead to immediate shaft seal failure.

• Initial Priming: After installation and before the first startup, the motor housing must be filled with clean hydraulic oil via the drain port to prevent dry friction of the rotating group.

• Cavitation Prevention: When operating as a motor in overrunning load conditions (acting as a pump), ensure sufficient charge pressure to prevent cavitation on the spherical valve surface.