Bosch Rexroth A2FM107 fixed displacement hydraulic motor

At the core of the A2FM107 lies a sophisticated swashplate axial piston mechanism. This design differs fundamentally from simpler gear or vane motors, offering superior performance. Here’s how it achieves this:

• Key Components: A rotating cylinder block houses several pistons aligned parallel to the output shaft. Each piston bears against a fixed-angle, non-adjustable swashplate.

• The Power Stroke: Pressurized hydraulic oil is directed into the piston chambers. This pressure forces the pistons outward, where they slide against the angled surface of the swashplate.

• Force Transformation: This interaction converts linear piston force into a tangential force on the cylinder block. The resultant torque causes the entire block and the attached drive shaft to rotate smoothly and powerfully.

• The Efficiency Advantage: This direct, positive-displacement action is renowned for its high volumetric efficiency (minimizing internal leakage) and high mechanical efficiency (effectively converting hydraulic force into torque), making it ideal for high-power applications.

The Implication of a Fixed Displacement Design

The "fixed displacement" specification is a critical performance characteristic, not just a label. It defines the motor's fundamental relationship with the hydraulic system:

• Predictable Performance: With a locked displacement of 107 cm³ per revolution, the motor's operational parameters are precisely linked to system inputs. Its rotational speed is directly and linearly proportional to the input flow rate from the pump. Simultaneously, its output torque is directly proportional to the applied system pressure.

• Control Simplicity: This linear relationship allows for straightforward and predictable control. To increase speed, you increase flow. To increase torque (or force), you increase pressure. This makes it an exceptionally reliable choice for applications requiring steady, powerful, and easily managed rotary drive.

Technical Specifications: Defining the Performance Envelope

The A2FM107’s capabilities are quantified by a precise set of engineering parameters that guide proper system integration and selection.

• Displacement: 107 cm³/revolution (≈6.53 cubic inches/rev). This fixed volume is the motor's "gearing," determining its torque-speed character.

• Maximum Operating Pressure: Up to 450 bar (6,525 psi) continuous for standard models, with peak capabilities reaching 500 bar (7,250 psi) intermittently. This defines its ultimate torque-producing capability.

• Speed Range: Engineered for versatility, it operates effectively across a broad spectrum, from high-torque/low-speed scenarios to higher-speed applications, contingent on specific model variants and lubrication schemes.

• Efficiency Profile: Designed for high overall efficiency, it minimizes energy loss through friction and internal leakage, ensuring maximum power transfer and reduced heat generation.

• Configuration Flexibility: Offered with multiple shaft options (splined, keyed) and porting standards (SAE, metric) to ensure seamless integration into diverse hydraulic systems.

Applications: Real-World Solutions for Demanding Industries

The A2FM107’s blend of robustness, power density, and compact design makes it a preferred component across heavy industries.

• Mobile Equipment: Directly driving the wheels or tracks of compact track loaders, drill rigs, and specialty vehicles, where its package size and high starting torque are critical.

• Material Handling: Providing the reliable rotational force for heavy-duty conveyor drives, hoisting winches, and the slewing mechanisms of stacker cranes.

• Industrial Automation: Acting as the prime mover for large mixers, drying drums, and other process equipment requiring continuous, dependable rotary motion.

• Forestry & Agriculture: Powering demanding attachments like harvester heads and baler feed mechanisms, where high torque in a shock-loaded environment is essential.

Use Case Example: In a double-drum vibratory roller, an A2FM107 motor is often the optimal drive for the compaction drum. The fixed displacement provides the operator with intuitive, linear control over drum speed via the pump. Meanwhile, the motor’s inherent high breakaway torque instantly overcomes the drum's inertia, ensuring immediate and effective compaction from a standstill.

Selecting the A2FM107 over alternative motor types provides tangible system benefits:

1. Superior Power Density: Delivers exceptional torque and power output relative to its physical size, saving valuable space in tight equipment layouts.
2. Exceptional Torque Characteristics: Excels in both high starting torque for breakaway conditions and consistent running torque, outperforming many gear and vane motors in load-holding and start-up under pressure.
3. Enhanced Durability & Service Life: Manufactured to exacting tolerances with high-grade materials, it withstands continuous duty cycles and high load impulses, reducing total cost of ownership.
4. Smooth, Low-Ripple Operation: The axial piston design ensures minimal torque fluctuation, resulting in smoother shaft rotation, reduced vibration, and less stress on downstream mechanical components.
5. Global Engineering Support: As part of the Bosch Rexroth portfolio, it is supported by a worldwide network of technical expertise, detailed documentation, and assured parts availability.

Installation & Maintenance: Ensuring Peak Performance & Longevity

Proper handling and care are paramount to realizing the motor’s full service life and reliability.

Critical Installation Guidelines

• Precision Alignment: Rigorously align the motor shaft with the driven load to prevent harmful radial or axial sideloads, which can prematurely fail bearings and seals.

• Isolate Vibration: Use flexible hose sections near the ports to isolate the motor from piping strain and chassis vibration.

• Secure Connection & Case Drain Management: Adhere to specified torque values for all mounting and port fittings. Crucially, if equipped, the case drain line must be plumbed directly to the reservoir with minimal backpressure to prevent internal seal damage from oil accumulation.

Essential Ongoing Maintenance Protocol

• Hydraulic Fluid Cleanliness: This is the single most critical factor. Maintaining fluid to the recommended ISO cleanliness code (typically ISO 18/16/13 or better) is non-negotiable to protect the precise piston-cylinder interface from abrasive wear.

• Proactive Filtration: Utilize high-beta ratio filters and adhere to strict change intervals to trap particles before they enter the motor’s tight clearances.

• Proper Commissioning (Break-in): Upon initial start-up, operate the motor at low pressure (20-30% of maximum) for 15-30 minutes. This circulates oil throughout the internal galleries, ensuring all surfaces are lubricated and purging any trapped air.

Specifications

Selection Table

Q1: Can the speed of the A2FM107 be varied?

A1:Yes, but not by adjusting the motor itself. As a fixed displacement motor, its speed is controlled by varying the input flow rate​ from the pump (e.g., using a variable displacement pump or a flow control valve).

Q2: Is a case drain connection always required?

A2:Not always, but it is highly recommended for most applications, especially those involving high continuous pressure or variable speeds. The case drain protects the motor by bleeding off internal leakage oil, preventing seal damage from pressure buildup in the housing.

Q3:What is the price and delivery time of the A2FM107 hydraulic motor?

A3: The specific price and delivery time will be provided based on the specific model you provide.

Q4:How to purchase an A2FM107 hydraulic pump?

A4:You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.