Rexroth A2FE Fixed Displacement Axial Piston Hydraulic Motor

The A2FE uses a bent-axis design, where the cylinder block is angled relative to the drive shaft. This angle produces smooth rotation without the complex valve plate timing issues found in some radial piston designs. Because the displacement is fixed, there are no servo pistons, feedback linkages, or proportional solenoids to fail. You lose adjustability, but you gain a motor that behaves identically every time you start the machine.

Key Construction Features

• Conical piston rings – Maintain sealing efficiency even after thousands of thermal cycles.
• Nodular cast iron housing – Absorbs mechanical shock better than aluminum alternatives.
• Tapered roller bearings – Sized for significant external axial and radial loads (important for wheel drives).

Installation and Application Domains

The A2FE appears in three primary configurations, each serving a distinct industry.

1.Wheel and Track Drives (Mobile Hydraulics)

When bolted directly inside a planetary hub, the motor sees both high case pressure and shock loads. The A2FE’s through-shaft option allows tandem mounting with a parking brake. Common in:

• Telehandlers
• Agricultural spreaders
• Small excavators

2.Industrial Constant-Speed Applications

For machine tools or test stands requiring fixed pump/motor operation, the A2FE runs as a pump in open loop. The fixed angle guarantees repeatable flow per revolution—critical for synchronous multi-motor systems.

3.Marine and Offshore Winches

The A2FE series includes corrosion-protected variants for deck-mounted winches. Even without a brake valve, the motor’s natural damping (due to fixed displacement) reduces load drift compared to equivalent sized piston motors.

Maintenance, Failures, and Troubleshooting

No motor is immortal. Here’s what to watch for.

Common Failure Mode: Shaft Seal Leakage

Because the A2FE does not have a dedicated case drain relief (the system circuit provides it), excessive case pressure pops the shaft seal. Symptoms: Oil dripping from the bell housing weep hole. Root cause: Restricted drain line or worn piston shoes.

Wear Indicator: Bronze Particle Count

If you see fine bronze glitter in your return filter, the piston shoes are starting to fail. The A2FE uses bronze-coated steel shoes against a hardened swashplate (actually a fixed angle plate). Replace the rotating group when particle counts exceed ISO 21/19/16 at 400 bar.

For more information on the Rexroth hydraulic motor, please visit https://www.baolilaihydraulic.com/pro2-2/.

Specifications

Selection Table

Q1: What’s the difference between A2FE and A6VM (variable)?

A1: A2FE is fixed displacement; A6VM is variable with an integral high-pressure relief and boost pump option. If you need to change torque at constant pressure, choose the A6VM. For constant speed/torque with high shock tolerance, choose A2FE.

Q2: Can I run the A2FE in closed-loop hydrostatic circuits?

A2:Yes. The motor is designed for both open and closed loop. In closed loop, ensure you use the high-pressure shaft seal option, as case pressure will rise with charge pressure.

Q3: What is the price and delivery time of the A2FE hydraulic motor?

A3: The specific price and delivery time will be provided based on the specific model you provide.

Q4:How to purchase an A2FE hydraulic motor?

A4:You can click on the right sidebar or the contact information in the top bar to contact us to purchase. You can do so via email, form, WeChat, WhatsApp, or other methods.