Name: Rexroth A4FM500 Large Displacement Axial Piston Motor for Industrial, Marine and Engineering Equipment
SKU: 2372586

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Introducción del producto

Of course. The Rexroth A4FM500 is a high-performance, large-displacement axial piston motor designed for the most demanding applications. Here’s a detailed breakdown of its key features, typical applications, and technical characteristics.

Overview

The A4FM500 is part of Bosch Rexroth's renowned A4FM series of swashplate design axial piston units. As a "500" model, it signifies a very large displacement (500 cm³/rev or more, depending on the specific subtype), making it capable of producing extremely high torque at relatively low speeds. It is engineered for durability, high power density, and precise control.

Key Features & Design Principles

Swashplate Design: Utilizes a fixed or variable displacement swashplate mechanism (the "FM" in A4FM typically denotes a variable motor). This design is known for its robustness, efficiency, and ability to handle high continuous pressure.
Bent-Axis vs. Swashplate: Unlike Rexroth's A6VM (bent-axis) motors, the A4FM's swashplate design often allows for a more compact build in certain dimensions, which can be advantageous in space-constrained installations.
High Power Density: Delivers maximum output from a relatively compact unit, crucial for mobile and marine applications where weight and space are at a premium.
High Efficiency: Optimized hydraulics, precision manufacturing, and effective sealing minimize losses, leading to high volumetric and hydro-mechanical efficiency, which reduces heat generation and fuel/power consumption.
Robust Construction: Built to withstand harsh environments, shock loads, and continuous operation under high pressure (up to 450 bar and higher for some models).
Control Options: Can be equipped with various control options for variable displacement models, such as:
- HD (Hydrostatic Displacement Control): For remote control of displacement and thus speed/torque.
- HA (Hydraulic Assist Control): For high-response control.
- EZ (Electronic Proportional Control): Enables easy integration into electronic control systems.

Typical Applications

As you mentioned, it's built for heavy-duty sectors:

Industrial:
- Large winches and capstans
- Conveyor drives (especially for mining)
- Mixers and agitators
- Rolling mill drives
- Test rigs and dynamometers
Marine:
- Main Propulsion Drives: For tugboats, trawlers, and small commercial vessels (often in multiple motor configurations).
- Thruster Drives: Bow and stern thrusters for dynamic positioning and maneuverability.
- Deck Machinery: Windlasses, mooring winches, crane drives.
Engineering & Mobile Equipment:
- Drilling rigs (rotary drives)
- Pile driving equipment
- Cable laying equipment
- Large hydraulic trenchers

Technical Specifications (General Highlights)

Displacement: Approximately 500 cm³/rev (Specific code required for exact value, e.g., A4FM 500/xyz).
Maximum Pressure: Up to 450 bar (6,500 psi) continuous, with higher peak pressure capability.
Maximum Speed: Varies with size and configuration, but for a 500cc unit, typical maximum speeds are in the range of 2,000 - 3,000 rpm depending on the porting and controls.
High Torque Output: Capable of delivering very high starting and running torque, making it ideal for direct drive or low-ratio gearbox applications.
Mounting: Standard SAE or DIN flange mounts.
Shaft: Heavy-duty splined shaft for high torque transmission.

Why Choose the Rexroth A4FM500?

Brand Reliability: Bosch Rexroth is a global leader in hydraulics, offering extensive technical support, documentation, and a parts network.
Proven Technology: The A4FM series has a long track record of reliability in critical applications.
System Compatibility: Designed to work seamlessly with Rexroth pumps, valves, and electronics for optimized system integration.
Global Service & Availability: Supported by a worldwide service network.

Important Considerations for Use

Exact Model Code: The full performance data is defined by the complete model code (e.g., A4FM 500 HD1 xxx xxx). This specifies displacement, control type, shaft, ports, and sealing options.
Filtration: Like all high-precision piston pumps and motors, it requires extremely clean fluid (typically ISO 18/16/13 or better). Proper filtration is non-negotiable for long life.
Break-in Procedure: A proper commissioning and break-in procedure, as outlined in the technical data sheet, is essential for longevity.
Cooling: At this size and power level, adequate system cooling for the hydraulic oil is critical.

Where to Find Information:

For precise specifications, dimensional drawings, and operating parameters, always refer to the official Bosch Rexroth Technical Data Sheet (TD) for the exact model code of the unit. These are readily available on the Bosch Rexroth website or from authorized distributors.

Precautions for use
1. Do not knock when installing the coupling
2. Pump casing shall be filled with oil
3. Exhaust the air in the suction pipe
4. Check the filter
5. Check the cleanness of oil
6. Check the oil level
7. Check whether the pump direction is correct
8. Connect the oil drain pipe with the highest T-port
Common troubleshooting
1. No pressure, abnormal sound in pump case		There is air in the suction pipe; Remove air from suction piping. Damage of internal accessories; Immediately stop using and contact us.
2. No pressure, no abnormal sound in the pump case		The coupling is loose; Reinstall and secure coupling. Mismatching of steering; Newly order a pump that matches the steering. The oil suction pipe switch is not turned on; Open the oil suction pipe switch. The pressure of control valve is not enough; Clockwise adjust control valve. The control valve element is blocked by impurities; Remove the valve core and clean it.
3. There is pressure, but the pressure is not enough, without abnormal sound		Insufficient pressure of control valve DR valve; Clockwise adjust DR valve. Control valve DR valve is blocked by impurities; Disassemble the valve core of DR valve and clean it.
4. There is pressure, but there is abnormal sound in the pump		The coupling is loose; Reinstall and secure coupling. Air or moisture in the oil; Remove air or filtered water from the oil suction pipe. Impurities in the pump; Immediately stop using and contact us.
5. Insufficient flow		Low oil tank level; Fill the oil to the normal level. Blockage of oil suction pipeline filter; Replace the filter. The maximum displacement limiter is limited; Anticlockwise adjust the displacement limiter.
6. Excessive noise		The coupling is loose; Reinstall and secure coupling. Air or moisture in the oil; Remove air or filtered water from the oil suction pipe. Excessively high pressure of control valve DR valve; Anticlockwise adjust DR valve.
7. Oil leakage at framework oil seal		The oil drain pipe is too long or blocked; Shorten drain piping, reduce turns, and detect blockages. Excessive wear and oil leakage of internal accessories; Immediately stop using and contact us. Too high opening pressure of check valve of oil drain pipe; Replace with lower pressure or remove check valve.
8. Fast oil temperature rise		Poor radiator effect; Replace the radiator. The overflow valve of the system is damaged or the pressure is too low, resulting in long-term large. displacement output of the pump; Replace or adjust the overflow valve pressure of the system.