Types of A2FO16 for Rexroth Pumps
The A2FO16 is a high-performance axial piston hydraulic motor manufactured by Bosch Rexroth, a global leader in drive and control technologies. While the A2FO16 is a specific model, it belongs to a broader family of hydraulic motors and pumps that share similar design principles and applications. These components are engineered for durability, efficiency, and reliable performance in demanding industrial and mobile environments.
Below is a detailed overview of the key models and design variants related to the A2FO series, including the A2FO16, A2FMC, and A2FO45, along with their technical characteristics and typical applications.
A2FO Series (Including A2FO16)
Part of Rexroth's renowned axial piston motor lineup, the A2FO series features a variable displacement design enabled by an adjustable swash plate. This allows precise control over output speed and torque, making it ideal for applications requiring dynamic response.
Advantages
- Variable displacement for flexible performance
- High efficiency under varying loads
- Capable of frequent short-term overloads
- Robust construction for harsh environments
- Excellent power-to-weight ratio
Limitations
- More complex design increases maintenance needs
- Higher initial cost compared to gear motors
- Sensitive to fluid contamination if not properly filtered
Best for: Construction equipment, mining machinery, marine drives, and industrial systems requiring high torque and variable speed control
A2FMC Design
The A2FMC is a bent-axis axial piston motor with an orbital design, offering high displacement in a compact housing. It operates efficiently at low speeds while delivering high torque output, making it suitable for direct drive applications without gearboxes.
Advantages
- High torque at low rotational speeds
- Compact and lightweight design
- High volumetric and mechanical efficiency
- Ideal for space-constrained installations
- Smooth operation with minimal pulsation
Limitations
- Limited speed range compared to other designs
- Higher noise levels at peak performance
- Premium pricing due to precision engineering
Best for: Mobile machinery, winches, slewing drives, and small industrial tools requiring high starting torque
A2FO45 Model
A larger-capacity variant within the A2FO family, the A2FO45 offers significantly higher displacement than the A2FO16. It maintains the same advanced axial piston technology but is scaled for heavy-duty applications where maximum power output is critical.
Advantages
- Very high displacement and torque output
- Built for continuous heavy-load operation
- Compatible with Rexroth's control and valve systems
- Excellent thermal stability under prolonged use
Limitations
- Larger size and weight limit retrofit options
- Requires higher flow rates and system capacity
- Increased power consumption compared to smaller models
Best for: Heavy industrial machinery, large construction equipment (e.g., excavators, cranes), and high-power mobile hydraulics
Hydraulic Motors & System Integration
A2FO series pumps are often integrated with hydraulic motors to form complete hydrostatic transmission systems. These systems convert hydraulic energy into mechanical rotation, enabling precise control of wheels, tracks, conveyors, and other mechanical components.
System Benefits
- Infinitely variable speed control
- High torque at zero speed (stall torque)
- Regenerative capabilities in closed-loop systems
- Smooth acceleration and deceleration
- Remote operation and automation compatibility
System Challenges
- Requires precise system matching and tuning
- Higher system complexity increases setup time
- Needs regular maintenance of filters and fluid quality
Best for: Hydrostatic drives in agricultural machinery, earthmoving equipment, and industrial automation systems
| Model / Type | Displacement | Speed Range | Primary Application | Key Feature |
|---|---|---|---|---|
| A2FO16 | 16 cm³/rev | High speed, medium torque | Mobile hydraulics, auxiliary drives | Variable displacement, overload capable |
| A2FMC | Medium to High | Low speed, high torque | Direct drive systems, winches | Compact bent-axis design |
| A2FO45 | 45 cm³/rev | Medium speed, high torque | Heavy construction, industrial drives | High power density, robust build |
| Hydrostatic Systems | Configurable | Variable (system-dependent) | Wheel drives, track drives | Full speed control, high efficiency |
Expert Tip: When selecting an A2FO series motor or pump, ensure compatibility with your hydraulic system’s flow rate, pressure rating, and fluid type. Using Rexroth-recommended hydraulic oil and maintaining proper filtration (typically 10–15 μm) will significantly extend service life and prevent premature wear.
Material & Durability of A2FO16 for Rexroth Hydraulic Pumps
When investing in an A2FO16 axial piston pump from Bosch Rexroth, understanding the materials and durability characteristics is essential to ensure long-term performance, reliability, and value for money. These pumps are engineered for demanding industrial and mobile applications, where consistent operation under high pressure and variable loads is critical. The choice of materials and construction techniques directly impacts the pump’s efficiency, service life, and resistance to harsh operating environments.
Key Materials Used in A2FO16 Pump Construction
High-Strength Steel Alloys
The core internal components—such as the piston rods, drive shaft, and cylinder block—are typically manufactured from high-strength alloy steels, including chromium-molybdenum or nickel-chromium alloys. These materials are selected for their excellent tensile strength, fatigue resistance, and ability to withstand high-pressure cyclic loading.
Heat treatment processes like induction hardening or nitriding further enhance surface hardness, reducing wear and extending component life. This makes the A2FO16 particularly suitable for continuous-duty applications in heavy equipment and industrial machinery.
Cast Iron Housing
The pump housing is commonly constructed from high-grade cast iron, which offers superior rigidity, vibration damping, and dimensional stability under thermal and mechanical stress. Cast iron also allows for complex internal geometries necessary to support precision alignment of moving parts.
Its natural wear resistance and compatibility with lubrication systems help maintain internal sealing integrity over time. Additionally, the material’s thermal conductivity helps dissipate heat generated during operation, contributing to overall system reliability.
Specialized Surface Coatings
Many A2FO16 models feature advanced surface treatments such as electroless nickel plating, chrome plating, or diamond-like carbon (DLC) coatings on critical wear surfaces. These coatings significantly improve resistance to abrasion, corrosion, and micro-welding between metal components.
In environments where water contamination or aggressive hydraulic fluids are present, these protective layers prevent pitting and chemical degradation, preserving performance and reducing maintenance frequency.
Sealing & Elastomeric Components
While not structural, the selection of high-performance seals made from materials like fluorocarbon (FKM/Viton®), polyurethane, or PTFE-based compounds plays a vital role in durability. These materials maintain elasticity and chemical resistance across a wide temperature range and are compatible with common hydraulic oils, including anti-wear (AW) and fire-resistant fluids.
Proper seal design prevents internal leakage and contamination ingress, both of which can accelerate wear and reduce volumetric efficiency.
Durability Features That Ensure Long Service Life
| Component | Material/Feature | Functional Benefit |
|---|---|---|
| Drive Shaft & Pistons | Hardened Chromium-Molybdenum Steel | High fatigue strength and wear resistance under cyclic loading |
| Pump Housing | High-Grade Cast Iron | Vibration damping, structural rigidity, and heat dissipation |
| Sliding Surfaces | Nitrided or Chrome-Plated | Reduced friction and extended wear life |
| Seals | FKM (Viton®) or PTFE Composites | Chemical resistance and long-term sealing integrity |
| Overall Design | Sealed, Contamination-Resistant | Reliable performance in harsh environments |
Important: To maximize the lifespan and performance of your A2FO16 Rexroth pump, always use compatible hydraulic fluids meeting ISO cleanliness standards (typically ISO 4406 Class 18/16/13 or better). Regular maintenance, including filter changes and system flushing, is crucial. Operating the pump outside recommended pressure, temperature, or fluid conditions can lead to premature failure, even with superior materials and build quality.
Commercial Use Cases of A2FO16 for Rexroth Pumps
The A2FO16 axial piston pump from Bosch Rexroth is a robust, variable displacement hydraulic pump designed for high-pressure, continuous-duty applications. At the heart of its operation is a precision-engineered internal valve system that regulates hydraulic fluid flow to various components, ensuring efficient power transmission across diverse industrial environments. This advanced flow control enables reliable performance in mobile and stationary systems where durability, efficiency, and consistent power output are critical.
Known for its compact design, high efficiency, and excellent power-to-weight ratio, the A2FO16 is widely adopted across multiple commercial sectors. Below are the key industries and applications where this Rexroth pump delivers exceptional value.
Heavy Equipment
In mining and large-scale construction, hydraulic systems must withstand extreme loads, vibrations, and harsh environmental conditions. The A2FO16 Rexroth pump plays a vital role in powering track drives, wheel motors, and swing mechanisms in heavy-duty machinery such as excavators, bulldozers, and haul trucks.
- Provides smooth, responsive control of propulsion systems under variable load conditions
- Enables precise speed regulation in articulated vehicles operating on uneven terrain
- Integrated load-sensing capabilities improve fuel efficiency and reduce heat generation
- Resistant to contamination and thermal stress common in dusty, high-vibration environments
Key benefit: High reliability and long service life reduce downtime in mission-critical operations.
Marine Applications
Hydraulic systems are essential for maneuverability and propulsion in marine vessels, including commercial ships, offshore platforms, and military submarines. The A2FO16 pump is trusted in marine hydraulics due to its corrosion-resistant materials and ability to operate reliably in saltwater environments.
- Drives hydraulic propellers and azimuth thrusters for dynamic positioning and precise navigation
- Operates rudder actuators and stabilizer fins for improved vessel stability
- Used in winch and crane systems for cargo handling and anchor deployment
- Sealed design prevents moisture ingress and ensures consistent performance in humid conditions
Pro tip: Pair with compatible hydraulic motors for closed-loop hydrostatic drives in pod propulsion systems.
Industrial Machinery
Factories and production facilities rely on hydraulic power for pressing, lifting, clamping, and material handling tasks. The A2FO16 provides the controlled, high-force output needed for industrial automation and manufacturing equipment.
- Used in hydraulic presses for metal forming, stamping, and molding applications
- Supplies power to automated assembly lines and robotic arms requiring precise motion control
- Drives forklift mast lifting systems and load-handling attachments
- Supports energy recovery systems in energy-efficient machine designs
Critical advantage: Variable displacement allows energy savings by matching output to demand, reducing operational costs.
Mobile Machinery
Construction and warehouse equipment require compact, powerful hydraulic solutions that can adapt to changing workloads. The A2FO16 excels in mobile machinery by delivering responsive power to multiple functions simultaneously.
- Powering excavator boom, arm, and bucket movements with high torque at low speeds
- Driving lift trucks and telehandlers in warehouse and logistics operations
- Operating backhoe loaders and skid-steer attachments with rapid cycle times
- Enabling hydrostatic transmission for zero-radius turning and smooth acceleration
Smart integration: Often paired with electronic controls for enhanced operator precision and diagnostics.
Agriculture and Forestry
Modern agricultural and forestry machinery demands powerful, efficient hydraulic systems to handle demanding field operations. The A2FO16 is commonly integrated into tractors, harvesters, and forestry equipment for reliable performance in remote locations.
- Drives hydraulic implements such as plows, mowers, and balers via PTO-powered systems
- Provides power for self-propelled sprayers and precision planting equipment
- Used in forestry cranes and delimbers for efficient log handling
- Supports implement lift systems and steering assist functions
Field-proven: Designed for long maintenance intervals, crucial for seasonal peak operations.
Integrated Hydraulic Systems
Suppliers and OEMs often offer the A2FO16 Rexroth pump pre-coupled with hydraulic motors to form complete hydrostatic drive units. These integrated systems simplify installation and optimize performance in mobile and industrial applications.
- Enables compact hydrostatic transmissions for wheel and track drives
- Supports bidirectional operation and infinitely variable speed control
- Reduces system complexity by minimizing external plumbing and valves
- Ideal for retrofitting older machinery with modern, efficient drive technology
Value-added solution: Complete pump-motor packages improve reliability and shorten commissioning time.
Expert Insight: When specifying the A2FO16 for commercial applications, consider system compatibility, operating temperature range, and filtration requirements. Using high-quality hydraulic oil and maintaining proper fluid cleanliness extends pump life significantly. For optimal performance, pair the pump with Rexroth’s complementary valves, motors, and controllers to create a fully engineered hydraulic circuit.
| Application Sector | Typical Equipment | Key Performance Requirements | A2FO16 Advantages |
|---|---|---|---|
| Heavy Equipment | Excavators, Bulldozers, Haul Trucks | High torque, durability, vibration resistance | Robust housing, long service life, efficient heat dissipation |
| Marine | Ships, Submarines, Offshore Vessels | Corrosion resistance, reliability, compactness | Sealed components, stainless steel options, compact design |
| Industrial | Hydraulic Presses, Forklifts, Assembly Lines | Precise control, energy efficiency, continuous operation | Variable displacement, low noise, high efficiency |
| Mobile Machinery | Backhoes, Telehandlers, Skid Steers | Responsive power, compact size, multi-function support | Fast response, hydrostatic transmission compatibility |
| Agriculture & Forestry | Tractors, Harvesters, Forestry Cranes | Field reliability, power density, ease of maintenance | Durable construction, proven in OEM installations |
Additional Considerations for Optimal Deployment
- Maintenance Intervals: Regular inspection of case drain flow and fluid condition helps detect early wear signs
- Filtration Standards: Maintain fluid cleanliness to NAS 1638 Class 8 or better for maximum longevity
- Mounting Options: Available with SAE or metric mounting configurations for global compatibility
- Control Types: Options include manual, hydraulic, or electronic displacement controls for application flexibility
- Environmental Compliance: Meets ISO and CE standards; suitable for use in environmentally sensitive areas when properly sealed
How To Choose A2FO16 for Rexroth Pumps: A Comprehensive Buyer's Guide
Selecting the right A2FO16 axial piston pump from Bosch Rexroth is essential for ensuring reliable, efficient, and long-lasting performance in hydraulic systems. These variable displacement pumps are widely used in industrial, mobile, and heavy-duty machinery due to their robust design and high power density. This guide outlines the key selection criteria buyers should consider when purchasing an A2FO16 Rexroth hydraulic pump to ensure compatibility, optimal operation, and system longevity.
Important Note: Always verify the exact model number, technical specifications, and compatibility with your existing hydraulic system before purchase. Using an incompatible pump can lead to reduced efficiency, premature failure, or safety hazards.
1. Displacement: Matching Flow Requirements
Displacement refers to the volume of hydraulic fluid the pump can deliver per revolution (measured in cm³/rev or in³/rev). The A2FO16 series features a nominal displacement of 16 cm³/rev, making it suitable for medium-capacity applications requiring precise flow control.
- High-Flow Applications: Ideal for systems needing consistent fluid delivery under variable loads, such as winches, small hydraulic drives, and auxiliary circuits.
- Compact Design Advantage: Despite its relatively small size, the A2FO16 offers excellent power-to-size ratio, enabling integration into space-constrained machinery.
- Variable Displacement Feature: Allows adjustment of output flow to match system demand, improving energy efficiency and reducing heat generation.
Ensure that the pump’s maximum achievable flow (based on displacement and input speed) aligns with your system’s requirements to avoid underperformance or overloading.
2. Pressure Rating: Ensuring System Compatibility
The pressure rating defines the maximum operating pressure the pump can safely handle without risking internal damage or seal failure. For the A2FO16 model:
- Typical continuous operating pressure is up to 350 bar (5,075 psi).
- Peak pressure tolerance may reach up to 400 bar (5,800 psi) for short durations.
- Designed for use in closed-loop and open-loop hydraulic circuits with high-pressure demands.
Always cross-check the pump’s pressure rating with your system’s maximum working pressure. Exceeding these limits can cause catastrophic failure, leakage, or accelerated wear of internal components such as pistons, swashplates, and valve plates.
3. Shaft Orientation: Aligning Mechanical Configuration
Shaft orientation determines how the pump connects to the prime mover (e.g., electric motor or engine). Proper alignment ensures smooth power transmission and minimizes mechanical stress.
- The A2FO16 typically features a through-drive shaft or single shaft extension, allowing for direct coupling or connection via flexible couplings.
- Common configurations include:
- Parallel shafts: Input and output shafts run in the same direction and plane—ideal for inline motor-pump setups.
- Perpendicular mounting: Requires additional gearboxes or right-angle drives if space constraints dictate non-linear arrangements.
- Verify shaft type (spline, keyed, or tapered) and rotation direction (clockwise or counterclockwise) to ensure compatibility with your drive system.
4. Mounting Options: Ensuring Proper Integration
Correct mounting is crucial for maintaining alignment, minimizing vibration, and preventing premature wear. The A2FO16 supports multiple mounting styles depending on the application:
- Flange Mounting: Uses a standard SAE or DIN flange for secure attachment to motors or frames—common in industrial equipment.
- Foot Mounting: Integrated base feet allow direct bolting to a chassis or platform—often used in mobile hydraulics.
- Face and End Mounting: Enables compact installation in tight spaces, especially when integrated into a hydraulic power unit (HPU).
- Mounting position (horizontal, vertical, or angled) must also be considered to ensure proper lubrication and prevent cavitation.
Always confirm the mounting interface dimensions and bolt patterns match your existing setup to avoid costly modifications.
5. Efficiency: Maximizing Performance and Reducing Costs
Efficiency directly impacts energy consumption, heat generation, and operational costs. The A2FO16 is engineered for high efficiency across a wide operating range:
- Volumetric Efficiency: Typically exceeds 95% at rated pressures, meaning minimal internal leakage and consistent flow output.
- Hydraulic-Mechanical Efficiency: Ranges from 90–94%, reflecting effective conversion of mechanical input to hydraulic power.
- Overall Efficiency: Can reach up to 85–90% under optimal conditions, contributing to lower fuel or electricity consumption.
Higher-efficiency models often incorporate advanced materials, precision machining, and optimized internal geometries. When comparing suppliers or remanufactured units, request performance test data to validate efficiency claims.
| Selection Criteria | Key Specifications (A2FO16) | Application Considerations | Common Mistakes to Avoid |
|---|---|---|---|
| Displacement | 16 cm³/rev (variable) | Suitable for medium-flow systems; ideal for compact machinery | Overestimating flow needs; ignoring speed limitations |
| Pressure Rating | Up to 350 bar continuous, 400 bar peak | Use in high-pressure circuits like winches, test benches | Operating beyond rated pressure without relief valves |
| Shaft Orientation | Single or through-drive shaft; clockwise/counterclockwise | Match to motor coupling type and rotation direction | Incorrect coupling selection or misalignment |
| Mounting Options | Flange, foot, or face mounting available | Ensure clearance and alignment with drive source | Using incorrect bolts or adapters; improper alignment |
| Efficiency | Volumetric >95%, Overall ~85–90% | Lower energy costs, reduced heat buildup | Choosing low-quality replicas with unverified efficiency |
Expert Tip: When sourcing A2FO16 pumps, prioritize OEM (original equipment manufacturer) or certified remanufactured units from reputable suppliers. Counterfeit or poorly rebuilt pumps may appear cost-effective initially but often suffer from inferior materials, poor tolerances, and shorter service life.
Final Recommendations for Buyers
- Always consult the official Rexroth datasheet for the specific A2FO16 variant (e.g., A2FO16-6X, A2FO16-L)
- Confirm compatibility with hydraulic fluid type (e.g., mineral oil, HFC, biodegradable fluids)
- Check for integrated features like pressure cut-off, load sensing, or electro-hydraulic controls
- Inspect seals and coatings for corrosion resistance if operating in harsh environments
- Consider adding a suction filter and ensuring proper inlet conditions to prevent cavitation
By carefully evaluating displacement, pressure rating, shaft orientation, mounting options, and efficiency, buyers can confidently select the right A2FO16 Rexroth pump for their application. Proper selection not only ensures peak performance but also extends service intervals and reduces lifecycle costs. When in doubt, consult a hydraulic system specialist or authorized distributor for technical support.
Frequently Asked Questions About A2FO16 Rexroth Hydraulic Pumps
The A2FO16 Rexroth hydraulic pump is a versatile axial piston pump designed for high-performance applications across a wide range of heavy-duty industries. Its robust construction and efficient power delivery make it ideal for environments where reliable hydraulic power is critical. Key industries that benefit from this pump include:
- Construction: Used in excavators, loaders, and cranes for lifting, digging, and material handling operations requiring consistent hydraulic pressure.
- Mining: Powers large-scale machinery such as drills, conveyors, and haul trucks operating under extreme conditions and high loads.
- Marine: Integrated into ship steering systems, winches, and deck machinery where compact size and high efficiency are essential.
- Manufacturing: Employed in industrial presses, injection molding machines, and automated production lines for precise motion control.
- Automotive: Utilized in testing rigs, assembly line equipment, and specialized vehicle systems like hybrid drive hydraulics.
Its ability to deliver smooth, continuous flow with minimal pulsation ensures optimal performance in both mobile and stationary applications.
Yes, the A2FO16 Rexroth hydraulic pump is engineered for exceptional durability and extended service life. Several design and material features contribute to its longevity:
- Durable Construction: Built with high-grade steel alloys and precision-machined components that resist wear and fatigue over time.
- Sealed Design: Features advanced sealing technology that prevents contamination from dust, moisture, and debris—common causes of internal damage.
- Efficient Cooling: Optimized internal flow paths reduce heat buildup, minimizing thermal stress on internal parts.
- Low Maintenance Needs: Designed for continuous operation with minimal downtime, especially when used within recommended operating parameters.
With proper installation, regular maintenance, and adherence to operating guidelines, the A2FO16 can provide reliable service for thousands of operating hours, making it a cost-effective solution for long-term industrial use.
The A2FO16 Rexroth hydraulic pump is constructed using premium materials selected for strength, wear resistance, and compatibility with harsh operating environments:
- Steel Alloys: The core components, including the piston block, drive shaft, and valve plates, are made from hardened steel alloys to endure high mechanical stresses and pressure loads.
- Specialized Coatings: Critical surfaces are often treated with anti-corrosion or low-friction coatings (such as chrome plating or ceramic finishes) to enhance durability and performance in chemically aggressive or high-temperature environments.
- Cast Iron Housing: The pump housing is typically made from high-strength cast iron, providing excellent rigidity, vibration damping, and protection against external impacts.
- Seals and O-Rings: Made from synthetic rubber compounds (e.g., NBR or FKM) that maintain integrity under varying temperatures and exposure to hydraulic fluids.
This combination of materials ensures the pump maintains performance integrity even under demanding operational conditions, contributing to its reputation for reliability and resilience.
Selecting the right A2FO16 model requires careful evaluation of several technical and application-specific factors to ensure compatibility, efficiency, and long-term performance:
- Displacement: Choose the appropriate displacement (measured in cc/rev) based on the required flow rate and system pressure. The A2FO16 offers fixed displacement options optimized for specific power ranges.
- Pressure Rating: Verify that the pump’s maximum operating pressure (up to 400 bar peak) matches or exceeds your system requirements to avoid premature failure.
- Shaft Orientation: Determine whether you need a through-shaft or blind-shaft configuration depending on your drive mechanism and space constraints.
- Mounting Options: Consider flange, foot, or bracket mounting styles to ensure seamless integration with existing equipment.
- Efficiency: Look for models with high volumetric and mechanical efficiency to reduce energy consumption and heat generation.
- Fluid Compatibility: Ensure the pump is compatible with your hydraulic fluid type (e.g., mineral oil, synthetic, or biodegradable fluids).
Consulting the official Rexroth product manual or working with a certified hydraulic systems engineer can help ensure the correct selection tailored to your specific application needs.
The primary commercial value of the A2FO16 Rexroth hydraulic pump lies in its role as a reliable and efficient power source for a vast array of hydraulically operated machinery across global industries. Its significance includes:
- High Demand Across Sectors: Due to its proven performance in construction, mining, marine, and manufacturing, the A2FO16 is widely specified in OEM equipment and aftermarket replacements.
- Energy Efficiency: Its design minimizes internal leakage and friction losses, reducing operational costs and supporting sustainability goals.
- Interchangeability and Support: As part of the well-established A2FO series, it benefits from widespread availability, technical documentation, and service support worldwide.
- Contribution to Productivity: By enabling powerful, precise, and consistent hydraulic actuation, the pump directly enhances the productivity and uptime of critical machinery.
These attributes make the A2FO16 not only a popular choice among engineers and maintenance teams but also a strategically important component in industrial supply chains, driving consistent market demand and long-term commercial relevance.








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