Rexroth AA2FM180/61W-VSD510 R902193869 Motor

Rexroth AA2FM180/61W-VSD510 R902193869 Axial Piston Motor

The Bosch Rexroth AA2FM180/61W-VSD510 (Part Number: R902193869) is a heavy duty fixed displacement axial piston motor based on the proven bent axis design. This unit is designed for efficient performance in demanding industrial and marine hydraulic applications, open and closed circuits. The rotary group is configured with an axial tapered piston design to deliver elite power density, low mechanical loss and excellent starting efficiency. This motor is completed with a protective RAL 5010 Gentian blue base coat and is engineered for demanding running conditions.

Model Details

• Manufacturer: Bosch Rexroth
• Product Series: Series 61
• Product Family: AA2FM
• Displacement Size: 180 cm³ / rev (10.98 cu-in)
• Manufacturer Part Number (MPN): R902193869

Technical Specifications

Key Features

1. High Power Density: Small footprint with highest torque per unit size.
2. Bent-Axis Architecture: High volumetric and mechanical efficiency is achieved by the direct transmission of force from the piston to the shaft.
3. Excellent Starting Efficiency: Offers good initial load performance when substantial initial load differentials exist.
4. Robust FKM Sealing: Equipped with high-quality fluoroelastomer seals, suitable for mineral oils and synthetic fluids across a broad heat range.

Applications

• Marine winches, deck machinery, and steering gear drives
• Off-highway mobile machinery and construction equipment
• Heavy industrial hydrostatic transmission drives
• Metal-working and extrusion press auxiliary systems
• Mining conveyors and material handling apparatuses

Compatible Equipment Models:

Designed for integration into heavy closed and open-loop hydrostatic transmission setups utilizing SAE J744 4-bolt mounts. Accommodates optional add-on flushing valves or counterbalance valves (BVD/BVE series).

Engineer Expert’s Guide

Advisory: When installing the AA2FM180 in marine or high-moisture environments, ensure the case drain line (Port T1) is routed directly back to the hydraulic reservoir above the fluid level, independent of other return lines. Never run the motor with a dry housing. Fill the case entirely with clean hydraulic oil matching ISO VG 46 or 68 viscosity grades prior to initial startup to protect the tapered piston assembly and internal bearings from immediate dry-friction scoring.

Frequently Asked Questions (FAQs)

What is the primary difference between the Rexroth A2FM and AA2FM motor lines?

The “AA” prefix designates specific metric-threaded port options, heavy-duty configurations, or distinct material revisions mapped inside Rexroth’s standardized ordering matrix while retaining identical physical envelope dimensions and flow profiles to base A2FM models.

Can the AA2FM180 motor operate in both clockwise and counter-clockwise rotations?

Yes. The unit features an alternating (bidirectional) direction of rotation depending on the direction of fluid delivery channeled through Ports A and B.

What type of hydraulic fluid is recommended for optimal performance?

Mineral-oil-based hydraulic fluids conforming to DIN 51524 standards (HL, HLP) are recommended. Ensure fluid cleanliness meets strict ISO 4406 cleanliness codes (minimum 20/18/15) to prevent premature wear on the internal rotary group pistons and port plate.

Is a case drain line strictly mandatory for this bent-axis motor?

Yes. The housing leakage oil port (T1) must be connected to the main tank to drain internal lubricating flows and prevent excessive internal casing pressure that will otherwise blow out the shaft seal.