Rexroth A6VM140 Series 63 Variable Axial Piston Motor
140 cm³/rev Bent Axis Hydraulic Motor for Excavator, Mining and Heavy Mobile Equipment
A6VM140 Series 63 Engineering Overview
The Rexroth A6VM140 belongs to the A6VM Series 63 family of variable displacement axial piston motors. The motor uses a bent-axis piston configuration and is designed for hydraulic systems where high torque density, adjustable displacement and efficient power transmission are required.
With a nominal displacement of 140 cm³/rev, this model is positioned between compact mobile motors and large displacement industrial motors, making it suitable for medium and heavy hydraulic drive systems.
Technical Specification
| Model | A6VM140 Series 63 |
| Displacement | 140 cm³/rev |
| Motor Type | Variable Axial Piston Motor |
| Design | Bent Axis Piston Structure |
| Displacement Control | Variable Hydraulic Control |
| Circuit Application | Open and Closed Hydraulic Systems |
Performance Analysis Under Real Working Conditions
During excavator travelling, the motor frequently operates under high starting resistance and variable load conditions. A6VM140's variable displacement structure allows adjustment between high torque operation at low speed and higher speed movement during transport conditions.
Mining machinery often experiences vibration, impact loading and long operating cycles. The bent-axis piston design provides efficient hydraulic conversion and supports continuous operation in demanding environments.
For winch and rotary systems, the motor requires accurate speed regulation and sufficient torque output. Variable displacement control helps optimize hydraulic power according to load requirements.
Engineering Advantages Compared With Fixed Displacement Motors
1. Adjustable Output Range
The displacement can be controlled according to operating requirements, allowing better matching between hydraulic flow and machine speed.
2. Improved System Efficiency
Variable displacement reduces unnecessary hydraulic flow loss compared with fixed motors operating with throttling control.
3. Higher Torque Density
The 140 cm³ displacement provides higher torque output within a compact installation space.
Typical Equipment Integration
- 35-50 ton class excavator travel and swing systems
- Mining drilling and loading equipment
- Heavy hydraulic transportation vehicles
- Industrial rotary drive units
- Hydraulic winch systems
Selection Considerations Before Purchase
When selecting A6VM140, engineers normally evaluate:
• Required torque at working pressure
• Hydraulic flow availability
• Maximum operating speed
• Control method compatibility
• Installation interface requirements
• Replacement model compatibility
A6VM140 Technical FAQ
Q1: What is the displacement of A6VM140 Series 63?
A: The nominal displacement is 140 cm³ per revolution.
Q2: Is A6VM140 a fixed or variable displacement motor?
A: It is a variable displacement axial piston motor.
Q3: Why is bent-axis design used in A6VM motors?
A: The bent-axis structure improves torque output and hydraulic efficiency.
Q4: What equipment commonly uses A6VM140?
A: Excavators, mining machinery, hydraulic winches and industrial drives.
Q5: What information is needed for motor replacement?
A: Engineers usually check displacement, control type, pressure range and mounting dimensions.
Q6: What is the advantage of variable displacement control?
A: It allows the hydraulic system to adjust motor output according to load and speed requirements.
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