Rexroth A2FM180 Hydraulic Motor | A2FM180/61W-VAB192-K | High Pressure Bent Axis Motor

The A2FM180 Series high-pressure bent axis fixed displacement motors from Chengyuan Hydraulic are high-performance drive units fully compatible with Rexroth Series 61 standards. Featuring the classic 40° bent axis design, these motors offer exceptional power density and self-priming capabilities. For core models like A2FM180/61W-VAB192-K and VAB100-S, we have optimized the tribological pairing of the pistons and cylinder block. Every motor undergoes 100% simulated full-load condition testing to verify that startup torque and volumetric efficiency at high pressures (400 bar) match OEM standards, ensuring 100% original-place interchangeability.

Technical Specifications :

• Nominal Size: 180 (Displacement: 180.2 cm³/rev)

• Series: Series 61 (61W)

• Nominal Pressure: 400 bar (40 MPa)

• Peak Pressure: 450 bar (45 MPa)

• Max Speed (n_max): 3400 rpm

• Intermittent Max Speed: 3900 rpm

• Output Torque (at Δp = 400 bar): 1147 Nm

• Sealing: V (Viton/FKM as standard)

• Shaft Ends: A (ISO Splined) / B (Parallel Keyed)

• Port Config: VAB (SAE Rear Ports) / VBB (Side Ports)

• Weight: Approx. 54 kg

Key Technical Advantages:

• 40° Bent Axis Synchronous Technology: Utilizing a high-precision synchronous hinge structure ensures perfectly synchronized piston movement. Compared to swashplate motors, the bent axis design of the A2FM180 provides superior self-priming and lower frictional losses at high speeds.

• Spherical Valve Plate Design: The contact interface between the valve plate and the cylinder utilizes spherical distribution technology for excellent self-centering. Even under high-pressure shocks or minor axial deviations, it maintains minimal internal leakage, keeping volumetric efficiency above 97%.

• Heavy-Duty Long-Life Bearings: For the large 180 displacement size, we have reinforced the main bearing configuration to handle higher radial loads (ideal for gear or belt drives). The housing is hydrodynamically optimized to ensure case drain flow effectively dissipates internal frictional heat.

• 100% Dynamic Validation: Chengyuan subjects every A2FM180 to no-load, half-load, and full-load step tests. We specifically calibrate the VAB192J-K models (equipped with speed sensor ports) to ensure precise rpm feedback for automated control systems.

Application Areas:

• Lifting Machinery: Main or auxiliary winch drives for crawler cranes and truck cranes.

• Tunneling: Cutterhead auxiliary drives or propulsion systems for Tunnel Boring Machines (TBM).

• Construction Equipment: Main pump drives for concrete pumps and rotary drilling rig power heads.

Expert Maintenance Tips:

• Mandatory Case Priming: Before starting the bent axis motor, the housing must be filled with hydraulic oil via the highest drain port. Starting dry will cause instantaneous seizure of the valve plate.

• Case Drain Pressure Monitoring: Ensure the drain line diameter is sufficient to keep case pressure consistently below 2 bar. Excessive backpressure will blow out the shaft seal (V-type Viton seal).

• Alignment Precision: Due to the high power output of the A2FM180, use a dial indicator to check coupling alignment during installation. Deviation must be kept within 0.05mm to prevent axial stress from damaging internal bearings.