Rexroth A2FM Series Piston Motor | A2FM63 A2FM80 A2FM32 | High Speed Hydraulic Motor

The A2FM Series axial piston fixed motors from Chengyuan Hydraulic are high-pressure bent-axis units fully compatible with Rexroth Series 61 & 63 standards. Engineered for high-speed applications in both open and closed circuits, these motors leverage a 40° bent-axis geometry to deliver exceptional power-to-weight ratios. For core models such as A2FM63, A2FM80, and A2FM32, we implement reinforced spherical valve plates and specialized wear-resistant alloys. Every motor undergoes 100% full-load condition testing to ensure peak performance at 400 Bar continuous pressure, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series Model: A2FM Series (Fixed Displacement)

• Displacements: 32cc, 63cc, 80cc /rev

• Design Series: Series 61 (Classic bent-axis)

• Nominal Pressure: 400 bar (40 MPa)

• Maximum Pressure: 450 bar (45 MPa)

• Max Speed: Up to 5000 rpm (A2FM32) / 4000 rpm (A2FM80)

• Rotation: Bi-directional (W: All-purpose valve plate)

• Sealing: FKM (Viton) standard for multi-fluid compatibility

• Mounting: ISO 4-bolt standard flange

Key Technical Advantages:

• 40° Bent-Axis Efficiency: Unlike swashplate designs, the bent-axis structure eliminates slipper failure risks, allowing for significantly higher rotational speeds while maintaining superior starting torque efficiency.

• Excellent Volumetric Efficiency: The spherical port plate design automatically compensates for thermal expansion, maintaining tight clearances and minimizing internal leakage across the entire pressure range.

• Robust Bearing System: Heavy-duty tapered roller bearings are optimized to handle both radial and axial loads, allowing the motor to directly drive heavy machinery attachments via couplings or gears.

• One-Piece Piston Design: Pistons are forged as single units and precision-ground, providing high structural integrity and stability during high-frequency reversals and impact loads.

Application Areas:

• Mobile Machinery: Excavator swing drives, track drives, and road milling machines.

• Industrial Transmissions: Mixer drives, hoist mechanisms, and hydraulic winches.

• Agriculture: Harvester header drives and wood chipper operations.

Expert Maintenance Tips:

• Case Drain Installation: The housing must be filled with oil before start-up. The drain line must be connected to the highest port and lead directly back to the tank to ensure constant bearing lubrication.

• Return Line Backpressure: Monitor return line backpressure carefully. Excessive pressure can compromise the shaft seal; a dedicated drain line is highly recommended for seal protection.

• Fluid Standards: Use high-quality ISO VG 46 anti-wear oil. Maintain cleanliness levels at ISO 19/17/14 or NAS Class 8 to maximize the lifespan of the bent-axis components.