A2F55W2P1 A2F125W2P2 Rexroth A2F Fixed Axial Piston Motor

Product Overview

The A2F55W2P1, A2F125W2P2, A2F63W2P2, A2F55W2Z2 and A2F160W2P2 are precision-engineered interchangeable fixed-displacement axial piston units fully compatible with the Bosch Rexroth A2F Series. Designed in bent-axis configuration, these units can operate as motors or pumps. Output torque is proportional to pressure differential and speed is proportional to flow. They offer compact design, high efficiency and excellent starting performance. They deliver 100% form-fit-function interchangeability with original Rexroth models. Every unit undergoes rigorous 100% simulated operating-condition testing to guarantee mechanical efficiency, volumetric efficiency and reliability under continuous rated conditions.

Technical Specifications 

• Models: A2F55W2P1, A2F125W2P2, A2F63W2P2, A2F55W2Z2, A2F160W2P2
• Geometric displacement: A2F55 approx. 55–56 cm³/rev; A2F63 – 63 cm³/rev; A2F125 – 125 cm³/rev; A2F160 – 160.4 cm³/rev
• Nominal pressure: 350–400 bar (depending on size and version)
• Peak pressure: 400–450 bar
• Maximum speed: A2F55/63 approx. 5000 rpm; A2F125 approx. 4000 rpm; A2F160 approx. 3600 rpm
• Control type: Fixed displacement (no variable mechanism)
• Shaft configuration: W2P1, W2P2, W2Z2 etc. (keyed or splined)
• Housing material: High-strength cast iron
• Approximate weight: A2F55/63 – 18 kg; A2F125 – 32–36 kg; A2F160 – 45–47 kg
• Circuit type: Open or closed circuit
• Design: Bent-axis fixed displacement

Key Technical Advantages

1. Bent-axis design with pistons directly supported on the drive shaft delivers high mechanical efficiency and excellent starting torque.
2. High power density and wide speed range enable compact installations suitable for both low-speed high-torque and high-speed applications.
3. Precision machining and piston-ring design ensure high volumetric efficiency and low internal leakage for reliable performance.
4. Robust cast-iron housing combined with heavy-duty bearings provides excellent rigidity, vibration resistance and extended service life under continuous high-pressure duty.
5. Full dimensional and functional interchangeability with original Rexroth A2F units, including mounting, shaft and ports, allows true drop-in replacement and dual pump/motor capability without system modifications.

Application Areas

Suitable for open or closed-circuit hydrostatic drives including construction machinery travel and swing drives, cranes, winches, agricultural equipment, marine auxiliary drives, industrial hydraulic motors and any application requiring fixed-displacement high-torque output.

Expert Maintenance Tips

Ensure precise shaft alignment and proper inlet/outlet line conditions during installation to prevent cavitation or pressure spikes. Confirm case drain is correctly routed to the reservoir within allowable back pressure before start-up. Use specified mineral-based hydraulic oil and maintain recommended cleanliness levels with regular filter changes. Periodically inspect the port plate, pistons and bearings; replace serviceable wear components as needed to restore performance. Observe maximum intermittent speed limits and avoid prolonged over-pressure or overspeed operation.