A2FE32/61W-VZL100 Rexroth Hydraulic Motor 32cc 400bar

Product Overview

The A2FE series is a classic representative of the Bosch Rexroth A2F family of bent-axis fixed displacement axial piston motors. The A2FE is a fixed displacement plug-in motor equipped with an axial tapered piston rotary group featuring a proven bent-axis design. This motor series is specifically designed for direct integration into mechanical gearboxes, with the mounting flange recessed into the center of the housing for an exceptionally compact structure.

The A2FE series offers a full displacement range from 28 cc/rev to 355 cc/rev, suitable for open and closed circuit hydrostatic drives. The A2FE32, A2FE45, and A2FE56 are the most compact displacement sizes in this series, with A2FE45/61W-VZL100 representing the complete Series 61 model code. These motors are widely used in swing and travel drives across mobile machinery and industrial equipment.

Our product provides a fully interchangeable direct replacement for the original Bosch Rexroth A2FE series motor, with identical mounting dimensions, port specifications, and shaft configurations. Every unit undergoes 100% simulated duty-cycle testing—performance-validated under rated pressure, peak pressure, and full speed range to ensure volumetric efficiency, mechanical efficiency, torque output, noise levels, and thermal characteristics meet or exceed original OEM specifications.

Technical Specifications 

The following technical data covers the A2FE32, A2FE45, and A2FE56 displacement sizes:

A2FE32/61W-VZL100

• Model: A2FE32/61W-VZL100

• Series/Version: Series 61

• Displacement (Vg): 32.0 cm³/rev

• Nominal Pressure: 400 bar (5,800 psi)

• Peak Pressure: 450 bar (6,500 psi)

• Max. Rated Speed (nnom): 6,300 rpm

• Max. Speed (nmax): 6,900 rpm

• Max. Input Flow @ nnom: 202 L/min

• Theoretical Torque @ 350 bar: 178 Nm

• Theoretical Torque @ 400 bar: 204 Nm

• Moment of Inertia (JGR): 0.0012 kg·m²

• Case Volume: 0.2 L

• Weight: Approx. 10.5 kg

A2FE45/61W-VZL100

• Model: A2FE45/61W-VZL100

• Series/Version: Series 61

• Displacement (Vg): 45.6 cm³/rev

• Nominal Pressure: 400 bar (5,800 psi)

• Peak Pressure: 450 bar (6,500 psi)

• Max. Rated Speed (nnom): 5,600 rpm

• Max. Speed (nmax): 6,200 rpm

• Max. Input Flow @ nnom: 255 L/min

• Theoretical Torque @ 350 bar: 254 Nm

• Theoretical Torque @ 400 bar: 290 Nm

• Moment of Inertia (JGR): 0.0024 kg·m²

• Case Volume: 0.33 L

• Weight: Approx. 15 kg

A2FE56/61W-VZL100

• Model: A2FE56/61W-VZL100

• Series/Version: Series 61

• Displacement (Vg): 56.1 cm³/rev

• Nominal Pressure: 400 bar (5,800 psi)

• Peak Pressure: 450 bar (6,500 psi)

• Max. Rated Speed (nnom): 5,000 rpm

• Max. Speed (nmax): 5,500 rpm

• Max. Input Flow @ nnom: 281 L/min

• Theoretical Torque @ 350 bar: 313 Nm

• Theoretical Torque @ 400 bar: 357 Nm

• Moment of Inertia (JGR): 0.0042 kg·m²

• Case Volume: 0.45 L

• Weight: Approx. 18 kg

Key Technical Advantages

1. Bent-Axis Design with Axial Tapered Piston Rotary Group
The A2FE series features Rexroth’s classic bent-axis design with an axial tapered piston rotary group. This design delivers exceptional efficiency at any speed or operating pressure, combined with outstanding impact resistance and heavy-load capacity. The bent-axis configuration provides higher starting torque and smoother low-speed operation.

2. Plug-in Design for Direct Gearbox Integration
The defining feature of the A2FE series is its plug-in design. With the mounting flange recessed into the center of the housing, the motor can be inserted directly into mechanical gearboxes without requiring additional connection flanges or adapters. This significantly reduces axial installation dimensions, simplifies system architecture, and improves overall power density.

3. Ultra-High Pressure & High Speed Capability
The A2FE series delivers nominal pressure of 400 bar and peak pressure of 450 bar. The A2FE32 reaches maximum speeds of 6,900 rpm, the A2FE45 reaches 6,200 rpm, and the A2FE56 reaches 5,500 rpm. The combination of high pressure and high speed provides exceptional power density in a compact package.

4. High Total Efficiency & Low Internal Leakage
The axial tapered piston design with precision port plates minimizes internal leakage while delivering high total efficiency. The 9-piston design provides smooth operation and high starting torque.

5. Suitable for Open & Closed Circuits
The A2FE series motors are suitable for open and closed circuit hydrostatic drives. Complete units are ready-assembled and tested—easy to install, simply plug into the mechanical gearbox.

Application Areas

The A2FE32/45/56 series motors are widely used in swing and travel drives across mobile and industrial equipment:

• Construction Equipment: Excavator swing drives and travel drives

• Road Construction Equipment: Roller vibratory drum drives

• Agricultural Machinery: Combine harvester header and travel drives

• Material Handling: Forklift and telescopic handler travel drives

• Mining Equipment: Underground mining vehicle and drill rig rotary drives

• Lifting Equipment: Mobile crane swing and winch drives

• Marine Machinery: Marine deck cranes and winch drives

Expert Maintenance Tips

1. Shaft seals and all O-rings must be replaced after every disassembly.

2. Pre-lubricate all moving parts with clean hydraulic fluid before assembly.

3. Purge all air from the motor housing before initial start-up—ensure the case drain line returns directly to the reservoir with the outlet below the oil level to prevent air entrapment and bearing starvation.

4. Monitor case drain flow regularly—an abnormal increase indicates potential piston, port plate, or cylinder barrel wear.

5. Recommended maximum system operating temperature should not exceed 80°C to ensure seal and fluid service life.

6. Ensure hydraulic system filtration meets Rexroth specifications (recommended β₁₀ ≥ 75, ISO 4406 cleanliness code不低于 18/16/13) to maximize motor service life.

7. The A2FE is a plug-in motor—ensure the gearbox bore and housing fit tolerances comply with Rexroth installation specifications.

8. Weight ranges from 10.5–18 kg—use proper handling procedures during installation and removal.