Rexroth A10VO71DFR1/31L Series High-Pressure Variable Displacement Axial Piston Pump for Machine Tools

Product Overview:
The A10VO71DFR1/31L is a high-performance swashplate design axial piston pump from the renowned Rexroth A10VO series. Specifically engineered for open circuit hydraulic systems, this variable pump delivers exceptional reliability, efficient operation, and precise flow control under demanding conditions . With a displacement of 71 cm³/rev and advanced DFR1 load-sensing control (combined pressure and flow control), it provides stepless flow adjustment matched exactly to system demands, significantly reducing energy consumption and heat generation . This unit is a direct, high-quality replacement solution for original Rexroth equipment.

Technical Specifications:

• Model: A10VO71DFR1/31L (e.g., A10VO71DFR1/31L-PSC62N00, A10VO71DFR1/31R-PSC62K02) 

• Type: Swashplate design, variable axial piston pump

• Series: 31 (Proven, reliable platform) 

• Displacement: 71 cm³/rev (steplessly variable)

• Nominal Pressure: 280 bar (continuous operation) 

• Maximum Pressure: 350 bar (peak) 

• Maximum Speed: 2200 - 2600 rpm (depending on control configuration)

• Flow Rate: Up to 156 L/min (at max speed)

• Control Type: DFR1 - Combined pressure and flow control (load sensing with pressure cutoff) 

• Design: For open circuit hydraulic systems

• Rotation Direction: L - Counter-clockwise (view on drive shaft)

• Through-Drive: 100% through drive suitable for adding gear pumps and axial piston pumps up to the same nominal size 

• Mounting Flange: SAE / ISO 3019-1 standard (2-bolt)

• Port Connection: SAE flange ports

• Weight: Approximately 28-30 kg

• Material: Robust cast iron construction 

• Temperature Range: 30-90℃ 

• Case Drain Ports: 2 connections for flexible system integration 

Core Features:

• Robust Swashplate Design: The proven swashplate design with cast iron construction ensures reliable operation, excellent volumetric efficiency, and long service life in open circuit applications .

• DFR1 Load-Sensing Control: Advanced combined control automatically adjusts pump displacement based on system demand—providing flow proportional to load pressure and pressure cutoff for system protection. This delivers significant energy savings compared to fixed displacement pumps .

• Stepless Variable Displacement: Flow is proportional to drive speed and displacement, adjustable steplessly from maximum down to zero via the swashplate angle, offering precise flow matching to reduce energy consumption and heat generation .

• Excellent Suction Characteristics: Superior self-priming performance ensures reliable operation even in demanding conditions and at higher speeds .

• 100% Through-Drive Capability: Universal through-drive design allows mounting of additional pumps up to the same nominal size for multi-circuit systems, enabling flexible and space-saving system configurations .

• Low Noise Operation: Optimized design ensures low noise levels during operation, contributing to a more comfortable working environment .

• High Power-to-Weight Ratio: Compact construction delivers impressive power density, ideal for space-constrained applications .

• Durability: Robust bearing system and high-quality materials ensure ultra-long service life in demanding continuous operation . The drive shaft can withstand both axial and radial loads .

• Dual Case Drain Ports: Two case drain ports facilitate maintenance and fluid management within the hydraulic system .

Main Applications (Suitable Equipment):
The A10VO71DFR1/31L is widely recognized as a versatile and reliable hydraulic power unit for medium to heavy-duty applications. It is extensively used in :

1. Machine Tools:

• Hydraulic feed systems for machining centers and lathes

• Clamping systems for workholding and fixtures

• Tool changing mechanisms in CNC machines

2. Metallurgical Equipment:

• Steel mill equipment (shearing machines, bending rolls, continuous casting lines)

• Forging manipulators and handling equipment

• Rolling mills and forming machinery

3. Hydraulic Presses & Forming Equipment:

• Hydraulic presses (C-frame, H-frame, and forging presses)

• Injection molding machines - main or auxiliary functions

• Extrusion presses and forming equipment

4. Mining & Tunneling Machinery:

• Mining machinery and coal mining equipment

• Tunnel boring machines (TBM) and roadheader auxiliary systems

• Rock drilling rigs and foundation equipment

5. Construction & Material Handling:

• Cranes and lifting equipment

• Material handlers and conveyors

• General industrial hydraulic systems

6. Specialty Applications:

• General industrial hydraulic power units

• Test stands and hydraulic systems requiring load-sensing control

• Marine hydraulics and deck machinery