A2FM107/61W-VBB020 hydraulic micro piston motor
The motor in question is a hydraulic micro piston motor, specifically the A2FM series—an axial piston fixed-displacement motor designed for rotary drive applications. The model breakdown is as follows:
- A2FM: Basic series identifier, indicating an axial piston motor with a bent-axis structure (common in high-torque, low-speed scenarios).
- 107: Displacement specification, meaning the motor’s displacement is 107cc/rev (output torque is proportional to this value).
- 61W: Mounting and connection code, representing standard flange mounting and shaft end configuration.
- VBB020: Control and auxiliary parameter code, typically related to pressure compensation settings and seal type.
It is primarily used as an OEM standard replacement part for rotary drive systems, with key application scenarios including:
- Construction machinery: Rotary mechanisms of small excavators, ローダー, or cranes.
- Industrial equipment: Rotary tables of machine tools, conveyor belt drives, or hydraulic winches.
- Agricultural machinery: Rotary components of harvesters, irrigation equipment, or farm implements.
- Specialized machinery: Rotary drives for marine auxiliary equipment or mining light-duty machinery.
Its smooth and reliable performance stems from two core design and quality advantages:
- Structural optimization: The axial piston bent-axis design ensures uniform force distribution during rotation, reducing pulsation and vibration.
- High-quality manufacturing: As an OEM-standard replacement, it adheres to strict quality control—precision-machined internal components (ピストン, cylinders, shafts) minimize friction and wear.
“OEM standard replacement” means the motor meets the original equipment manufacturer’s technical specifications, dimensional requirements, and performance standards. The key benefits are:
- Direct interchangeability: It can replace the original motor without modifying the equipment’s mounting structure or hydraulic circuit.
- Consistent compatibility: Ensures seamless integration with the existing system, avoiding mismatches in pressure, flow, or installation.
- Guaranteed quality: Follows OEM’s strict production standards, eliminating risks associated with non-standard substitute parts.
Two critical factors underpin its durability and performance:
- Material and component quality: High-strength alloy materials for key parts (shaft, piston assembly) resist wear, corrosion, and high-pressure impacts.
- Design for stability: The fixed-displacement structure maintains consistent output torque and speed under rated pressure, with pressure compensation (via the VBB020 code) preventing overloading and extending service life.
To ensure proper use, focus on three core matching criteria:
- Displacement compatibility: Confirm that the 107cc/rev displacement matches the original motor’s specifications (affects torque and speed output).
- Pressure and flow range: Verify that the motor’s rated pressure/flow aligns with the system’s operating parameters.
- Mounting and interface: Check that the 61W mounting code (flange, shaft size) matches the equipment’s installation requirements.
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