Rexroth Series AA6VM107 AA6VM107HD2 Replacement Hydraulic Axial Piston Motor for Drilling Rig

Product Overview:
The AA6VM107HD2 is a high-performance bent-axis design axial piston motor from the renowned Rexroth A6VM series. Designed for both open and closed circuit hydrostatic drives, this variable motor delivers exceptional power density, reliable operation, and precise control under extreme loads . With a displacement of 107 cm³/rev and advanced HD2 hydraulic proportional control, it provides stepless, high-precision speed and torque adjustment for demanding mobile and industrial applications . This all-purpose high-pressure motor features a robust construction for long service life and is approved for very high rotational speeds . This unit is a direct, high-quality replacement solution for original Rexroth equipment.

Technical Specifications:

• Model: AA6VM107HD2

• Type: Bent-axis design, variable axial piston motor

• Displacement: 107 cm³/rev (steplessly variable from Vg max to Vg min = 0) 

• Nominal Pressure: 400 bar (continuous operation) 

• Maximum Pressure: 450 bar (peak) 

• Maximum Speed: 3550 rpm at Vg max; up to 5600 rpm at reduced displacement 

• Flow Rate: Up to 380 L/min (at max speed) 

• Control Type: HD2 - Hydraulic proportional control (infinite displacement setting proportional to pilot pressure) 

• Design: For open and closed circuit hydrostatic drives

• Mounting Flange: SAE / ISO 3019-1 standard

• Port Connection: SAE flange ports

• Weight: Approximately 47 kg 

• Material: Robust cast iron construction with tapered piston design

• Temperature Range: -25°C to +115°C (with FKM shaft seal) 

Core Features:

• Bent-Axis Design: The robust angled shaft and axial tapered piston rotary group ensure high starting efficiency, excellent total efficiency, and resilience against shock loads. The drive shaft can withstand radial loads .

• HD2 Hydraulic Proportional Control: Provides infinite, precise setting of the displacement proportional to the pilot pressure applied to port X. Beginning of control at Vg max (maximum torque, minimum speed at minimum pilot pressure); end of control at Vg min (minimum torque, maximum permissible speed at maximum pilot pressure) .

• Stepless Variable Displacement: Output flow is infinitely variable between Vg max and Vg min = 0, offering precise flow matching to reduce energy consumption and heat generation. The wide control range enables the motor to satisfy requirements for both high speed and high torque .

• Very High Total Efficiency: Maintains exceptional efficiency even at high starting conditions, minimizing energy loss and reducing operating costs .

• High-Pressure Capability: Delivers 400 bar nominal and 450 bar peak pressure, meeting the most demanding mobile and industrial application requirements .

• High Power Density: Delivers 681 Nm of torque at 400 bar pressure differential, providing excellent power-to-weight ratio in a compact 47 kg package .

• Flexible Installation Options: Available with working ports SAE flange or thread, catering to various market requirements .

• Optional Integrated Valves: Can be equipped with optional flushing and boost-pressure valve mounted, or integrated/attached counterbalance valve for enhanced functionality .

• Durability: Robust motor with long service life, approved for very high rotational speeds . Features robust bearing system and high-quality cast iron materials .

• Multiple Control Options: Wide variety of controls available across the A6VM series including HD (hydraulic), EP (electro-proportional), HZ (two-point hydraulic), EZ (two-point electric), and HA (high-pressure automatic) control .

Main Applications (Suitable Equipment):
The AA6VM107HD2 is widely recognized as the specialized variable motor for machinery requiring precise, high-torque hydraulic power with adjustable speed control. It is extensively used in:

1. Excavators & Construction Machinery:

• Swing drives for medium excavators - smooth, precise slewing motion 

• Travel drives for crawler excavators and compactors

• Material handlers and tracked loaders

• Road rollers and compaction equipment

2. Drilling & Foundation Equipment:

• Rotary drilling rigs - power head drives 

• Piling rigs and foundation machinery

• Tunnel boring machines (TBM) and roadheaders - auxiliary drives 

3. Mining Machinery (Primary Application):

• Coal mining machinery and mining equipment - conveyor drives and cutter head drives 

• Rock drilling rigs and crusher drives 

• Continuous miners and development drills

4. Crane & Heavy Lifting Equipment:

• Mobile cranes and crawler cranes - winch and swing drives 

• Telehandlers and aerial work platforms

5. Industrial Machinery:

• Hydraulic presses and injection molding machines - precise speed control 

• Machine tools and industrial drives

• Conveyor systems and material handling equipment

6. Agricultural Machinery:

• Harvesters and forage harvesters 

• Tractors and agricultural implements with variable speed requirements

7. Marine & Offshore Applications:

• Marine hydraulic systems - winch drives and deck machinery 

• Anchor winches, cargo cranes, and propulsion systems

• Offshore equipment and port machinery

8. Specialty Applications:

• Municipal vehicles and sweepers

• Snow blowers and winter maintenance equipment

• Sanitation vehicles and refuse trucks