A2FM63/61W-VAB027

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Product details

A2FM63/61W‑VAB027 Hydraulic Piston Motor

Product Overview

This is a fixed displacement bent‑axis axial piston motor from Rexroth 61 series, designed for heavy‑duty high‑pressure applications. It is widely used in open and closed hydraulic circuits for mobile machinery, with part number R902201655 and net weight 21 kg.

Model Code Interpretation

- A2FM: Series code for fixed displacement bent‑axis axial piston motor

- 63: Nominal displacement: 63 mL/r

- 61: Generation code for internal structure configuration

- W: Bidirectional rotation (clockwise & counter‑clockwise available)

- V: Mounting flange: 4‑hole standard ISO diamond flange

- A: Port arrangement: SAE side inlet and outlet ports

- B: Shaft configuration: Involute spline drive shaft for heavy‑duty transmission

- 027: Internal configuration code, standard valve plate, without speed sensor or built‑in relief valve

Main Technical Specifications

Item Specification

Nominal Displacement 63 cm³/r

Rated Operating Pressure 400 bar (40 MPa)

Maximum Intermittent Pressure 450 bar (45 MPa)

Maximum Permissible Speed 3000 r/min

Minimum Stable Speed 50 r/min

Theoretical Torque (at rated pressure) Approx. 402 N·m

Volumetric Efficiency ≥92%

Overall Efficiency ≥87%

Applicable Circuit Open & closed hydraulic circuits

Recommended Fluid 46# anti‑wear hydraulic oil, viscosity 10~100 cSt

Operating Temperature -20℃ ~ 80℃

Net Weight 21 kg

Structural Features & Advantages

1. 40° Bent‑axis Design: High power density, stable torque output and strong impact resistance.

2. Alloy Steel Piston Assembly: Excellent wear resistance, low noise and long service life for frequent forward/reverse rotation.

3. Heavy‑duty Spline Shaft: High torsional strength, suitable for reducers, wheel drives and winch mechanisms.

4. Independent Drain Port: Separate T1 drain connection prevents backpressure damage to internal seals.

5. Interchangeable A/B Ports: Bidirectional operation without modifying installation layout.

Typical Applications

- Construction machinery: Travel motors, winch motors, concrete mixer drive motors

- Mining equipment: Small roadheaders, conveyor hydraulic drives

- Marine machinery: Deck machinery and capstan drives

- Industrial hydraulics: Heavy‑duty slewing mechanisms and mobile hydraulic power units

Installation Notes

1. An independent drain line is required; drain backpressure must not exceed 5 bar.

2. System filtration accuracy shall be no less than 10 μm to protect valve plate and pistons.

3. Ensure high concentricity during spline shaft installation; avoid excessive radial load.

A2FM63/61W-VAB027 Hydraulic Piston Motor Detailed Introduction

I. Product Overview

The A2FM63/61W-VAB027 is a fixed-displacement axial piston hydraulic motor manufactured by Bosch Rexroth, part of the A2FM series. Designed for hydrostatic transmission in open or closed hydraulic systems, this motor features a fixed displacement and is widely used in construction machinery, mining equipment, metallurgical machinery, and other industrial applications.

II. Core Specifications

• Model: A2FM63/61W-VAB027

• Material: Cast iron

• Application Scope: Construction machinery

• Operating Medium: Hydraulic oil

• Operating Temperature: 30–90°C

• Nominal Pressure: 32 MPa

• Rated Flow: 12 L/min (may vary based on operating conditions)

• Mounting Type: Flange-mounted

• Displacement: 63 cm³/rev (fixed displacement)

III. Performance Features

1. High-Efficiency Transmission

• The cylinder block and port plate adopt spherical porting design, enabling automatic centering during rotation. This reduces circumferential speed and enhances efficiency.

• Output rotational speed is directly proportional to flow rate and inversely proportional to displacement, making it ideal for precise speed control applications.

2. Robust Structural Design

• The drive shaft withstands radial loads, adapting to high-load operating conditions.

• Cast iron housing improves impact resistance and extends service life.

3. Low-Noise Operation

• Optimized porting structure minimizes hydraulic shock, ensuring smooth operation and reduced noise levels.

4. Versatile Adaptability

• Compatible with both open and closed hydraulic systems to meet diverse circuit requirements.

IV. Typical Application Scenarios

1. Construction Machinery

• Vibratory Rollers: Provides high-frequency vibration for improved compaction performance.

• Rotary Drilling Rigs: Drives drill rods for efficient drilling operations.

• Loaders/Excavators: Serves as a travel or swing motor for power support.

2. Mining Equipment

• Crushers: Powers breaker hammers for material crushing.

• Conveyors: Acts as a drive motor to control material conveying speed.

3. Metallurgical Machinery

• Rolling Mills: Delivers stable rolling force to ensure uniform plate thickness.

V. Maintenance and Service Recommendations

1. Hydraulic Oil Management

• Replace hydraulic oil regularly (every 1,000–3,000 operating hours or every six months) to prevent wear caused by contaminated oil.

• Use hydraulic oil with a recommended viscosity range of 20–50 cSt to suit varying temperature conditions.

2. Filter Element Replacement

• Periodically inspect and replace hydraulic system filters to prevent contaminants from entering the motor.

3. Seal Inspection

• Regularly check shaft-end seals and replace them immediately if leaks are detected to avoid oil loss and contamination.

4. Operational Monitoring

• Monitor noise, vibration, and temperature during motor operation. Halt operation and inspect immediately if abnormalities arise.

VI. Selection Considerations

1. Displacement Matching

• Select a displacement based on system flow and speed requirements to avoid inefficiencies from oversized or undersized motors.

2. Pressure Compatibility

• Ensure the motor’s nominal pressure (32 MPa) exceeds the system’s maximum operating pressure, with a safety margin.

3. Installation Space

• Verify that flange mounting dimensions align with equipment specifications to avoid installation challenges.