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Axial Piston Motors
Our axial piston motors impress with highest efficiency, robustness, and durability – ideal for demanding applications in construction machinery, agriculture, industry, and mobile hydraulics. With their compact design, high power density, and peak-level efficiency, they reliably convert hydraulic energy into mechanical rotary energy. Learn more...
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Manufactured from high-quality alloys and special materials, they ensure low wear, high starting torque, and trouble-free operation even under extreme conditions up to 450 bar. Whether swashplate motor or bent-axis motor – our range covers versatile requirements and offers powerful alternatives to renowned manufacturers such as Bosch Rexroth, Linde, or Danfoss.
Axial Piston Motors – Frequently Asked Questions
What are axial piston motors and how do they work?
Axial piston motors are hydraulic motors that convert hydraulic energy into mechanical rotational energy. Their design is similar to that of axial piston pumps. Inside, there is a cylindrical piston drum with axial bores. The pistons rest against an inclined swashplate. Due to pressure or suction acting on the pistons, the drum and thus the motor shaft begin to rotate.
The piston shoes are often made of bronze alloys, ensuring high sliding properties and low wear.
What are the main types of axial piston motors?
- Swashplate motor: Pistons slide on an inclined plate. A robust and widely used design.
- Bent-axis motor: Pistons are directly connected to an inclined shaft. Often higher efficiency, especially with variable motors.
Each design has specific advantages and disadvantages in terms of adjustability, cost, and efficiency.
Where are axial piston motors typically used?
Due to their high power density, versatility, and efficiency, axial piston motors are used in many industries:
- Construction machinery: excavators, wheel loaders, cranes
- Agriculture: tractors, harvesters
- Industry: presses, conveyor systems
- Mobile hydraulics: truck-mounted cranes, aerial platforms
- Shipbuilding/Offshore: rudder systems, winches
- Oil & gas industry: high-pressure pumps, compressors
They are particularly common in drive systems of mobile working machines.
What are the advantages of axial piston motors compared to other motors?
- Compact design with high power density
- High efficiency, especially in bent-axis motors
- Capable of continuous operation up to 350 bar, max. 450 bar
- Variable displacement options for flexible applications
- Long service life with proper maintenance
- Reduced pulsations and vibrations (swashplate motor)
What maintenance measures are important for axial piston motors?
- Regular oil level checks
- Use of suitable hydraulic oils (e.g. HLP according to DIN 51524)
- Filter and oil changes (filtration: ISO code 18/16/13 or better)
- Seal replacement & leakage checks
- Inspection of pistons, bearings, control plates for wear
- Initial start-up: fill and run-in before load operation
- An open drain line is always required
What technical specifications are typical for axial piston motors?
- Displacement volume: 5 – 1000 cm³/rev
- Operating pressure: up to 315 bar, continuous up to 350 bar, max. 450 bar
- Speed: up to 10,000 rpm, typically 3500–4200 rpm
- Output shafts: splined (SAE spline, W30x2x30) or PTO according to DIN 9611
- Flanges: 2-hole SAE A, 2-hole SAE B, 4-hole ISO, 4-hole SAE C
- Materials: high-strength alloys, tool steels, bronze piston shoes, special seals
What criteria are decisive when selecting an axial piston motor?
- Power & torque: Adaptation to machine requirements
- Operating pressure & flow rate: Compatibility with hydraulic system
- Environmental conditions: temperature, contamination, media
- Installation dimensions: motor must fit the intended installation space
- Cost-effectiveness: cost, efficiency, maintenance effort
- Options: integrated valves, sensors, special coatings
- Compatibility: alternatives to well-known manufacturers (e.g. Linde, Rexroth, Danfoss)
Professional advice helps to avoid under- or oversizing.
Do not hesitate to contact us for assistance in selecting the right axial piston motor.