Introduction to Bosch Rexroth Hydraulic Motors
Bosch Rexroth is one of the world’s leading brands in hydraulic drive and control technology. With over 200 years of history, Bosch Rexroth continues to innovate and deliver advanced hydraulic drive solutions for a wide range of industries worldwide.
Bosch Rexroth hydraulic motors are engineered to convert hydraulic energy into rotary mechanical motion, meeting the most demanding requirements for efficiency, durability, and reliability in heavy-duty industrial applications. The diverse product range comprises three main families: axial piston motors, external gear motors, and Hägglunds radial piston motors, each optimized for specific operating conditions and application requirements.
Main Bosch Rexroth Hydraulic Motor Families
1. Axial Piston Motors
Axial piston motors are the flagship product line from Bosch Rexroth, renowned for their high power density, outstanding efficiency, and ability to operate at high pressures. This family includes the following key series:
A2FM Series – Fixed Displacement Motors
The A2FM is a fixed displacement axial piston motor based on the bent-axis design principle, suitable for both open and closed circuit configurations. It is the most widely used motor series across industrial and mobile hydraulic systems thanks to its high reliability and flexible power range.
| Parameter | Value |
|---|---|
| Operating principle | Axial piston, bent-axis design |
| Displacement | Fixed |
| Displacement sizes | 5, 10, 12, 16, 23, 28, 32, 107, 125, 160, 180, 200, 250, 355, 500, 710, 1000 cc/rev |
| Nominal pressure | Up to 400 bar |
| Maximum pressure | 450 bar |
| Port connections | SAE flange or threaded (size-dependent) |
| Options | Integrated relief valve, multiple shaft and seal options |
| Hydraulic circuit | Open and closed circuit |
With 17 displacement sizes ranging from 5 to 1000 cc/rev, the A2FM covers a broad spectrum of applications—from compact systems to high-power equipment used in construction, mining, and material handling.
A2FE Series – Gearbox-Integrated Motors
The A2FE is a variant of the fixed displacement axial piston motor, specifically designed for direct integration into gearboxes. This design reduces the overall footprint of the drive assembly, simplifying both installation and maintenance.
- Nominal pressure: up to 400 bar
- Maximum pressure: 450 bar
- Advantages: compact design, lower installation costs, ideal for applications requiring a combined motor and gear reducer
- Typical applications: trucks, excavators, cranes, lifting equipment
A6VM Series – Variable Displacement Motors
The A6VM is a variable displacement axial piston motor that allows flexible speed and torque adjustment without changing the pump flow rate. It is the ideal solution for applications requiring precise motion control.
- High power density: compact design delivering high output
- Flexible control: continuously variable displacement for optimized energy efficiency
- Wide control range: well-suited for applications with frequent speed changes
- Applications: mobile machinery, machine tools, injection molding machines, metalworking equipment
Quick Comparison: A2FM vs A2FE vs A6VM
| Feature | A2FM | A2FE | A6VM |
|---|---|---|---|
| Displacement | Fixed | Fixed | Variable |
| Pressure | Up to 400 bar | Up to 400 bar | Up to 400 bar |
| Design | Bent-axis | Bent-axis, gearbox-integrated | Swashplate / bent-axis |
| Best for | General industrial & mobile use | Compact drive assemblies | Precision speed control |