Danfoss Axial piston motors

Danfoss has been developing high-quality components for mobile machinery for 40 years. Its axial piston motors offer maximum performance and reliability for demanding applications.

___________________________________________________________________________________________________________________________________________________________________________________________________________

MP1 motor

The MP1 motor is our next generation of fixed displacement axial piston motors.

The MP1 motor is designed for use in mobile devices using existing and proven technology. These motors have been optimized for product life, housing size, variety of options and low installation costs.
These motors have been optimized for product life, housing size, variety of options and low installation costs.
MP1 motors are offered in four sizes and in two housing variants, 20/24 and 28/32cc/rev, and can be operated in both closed and open circuits. Various mounting configurations are available: SAE A, B and two-bolt flange in cartridge form.

H1 series axial piston variable displacement motors

With the development of the H1 pumps/motors, Sauer-Danfoss responded to the trend towards electro-hydraulically driven mobile machines with greater functionality and higher power requirements.

Higher speeds, lower input speeds and a reduction in life cycle costs are required. H1 not only meets these requirements, but also enables simpler, more compact designs with servo-controlled hydrostatic pumps that can be used for increasingly complex functions. H1 is a completely new series intended for use in medium and high performance applications worldwide. The series includes axial piston variable displacement pumps for closed circuits, axial piston fixed displacement motors, axial piston variable displacement motors, PLUS+1 compatible control software and hardware.

Quality and reliability as design maxims

Standardized design concept

Reduced number of parts
One-piece swivel plate
Small number of control variants
Reduced number of parts for EDC (Electronic Displacement Control)

Advantages for integration and installation

Optimized motor length
Only one clean side
Better ratio between peak power and installation size
Integrated control function
Standardized connection interface
Greater range of functions thanks to PLUS 1

Optimized for electrical control systems

One electrical flow rate adjustment for all pump models
Integrated electronic automotive control
First-class EDC and PLUS 1 compatibility
SIL 2, electronic automotive control (AC)
4 electrical control options (EDC, NFPE, electronic AC or FNR)

Advanced functionality

Integrated automotive pump and automotive motor control functions
Override of the adjustment
Optional integrated sensors (pressure, angle, speed)
Electronically operated pressure limiter optional
PLUS 1 compatible

More overall efficiency

Optimized filling pump
Minimal control losses
Better equipment
Lower control pressure

Series 51 and 51-1 axial piston variable displacement motors

Series 51 and 51-1 variable displacement motors are bent-axis motors with spherical pistons.
The motors are used in combination with other products, primarily in closed circuits for the transmission and control of hydraulic power. The motors in the 51 and

51-1 series are characterized by the very large adjustment range Vg max./Vg min. = 5 and very high output speeds. SAE flange motors, slide-in motors and DIN flange motors are available.

A complete program of adjustments and controls meets the requirements of a wide range of applications.
The motors normally start with maximum displacement. This enables maximum starting torque for high acceleration.

The adjustments can be supplied with internal signal pressure and superimposed by a constant pressure control (Vg min. -> Vg max.), which is effective both in motor operation and in generator operation of the motor. With a direction-dependent cut-off, the constant pressure regulator superimposition can be rendered ineffective in regenerative operation of the motor (pump operation).

The constant pressure regulator superimposition has a low pressure rise (short ramp) and thus enables optimum utilization of the power over the entire control range of the motor.
Motors with constant pressure control only (without cut-off) are also available.

The most technically advanced hydraulic units in the industry
SAE flange motors, slide-in motors and DIN flange motors
Slide-in motors for direct installation in compact planetary gearboxes
Large adjustment range (5:1)
Complete adjustment and controller program
Proven reliability and performance
Optimum usability thanks to standardized connections and modular design
Lightweight and compact

Series 90 axial piston fixed displacement motors

Series 90 pumps and motors can be used together or in combination with other products in hydraulic systems. They are intended for use in closed-circuit applications.

Series 90 variable displacement pumps are compact units with high power density. All models operate on the parallel axial piston principle, together with an adjustable swivel disk to control the displacement of the pump. By reversing the angle of the swivel disk, the oil flow from the pump is reversed and consequently the direction of rotation of the motor.

The 90 series pumps are equipped with an integrated filling pump, which is used to refill the system and cool the oil flow, as well as providing control oil. They also include a range of through-drives to accommodate additional hydraulic pumps for use in complementary hydraulic systems. Various adjustments are available (mechanical, hydraulic, electrical) to adapt to the respective control system.

Series 90 motors also operate according to the parallel axial piston principle together with a fixed or adjustable swivel disk. The inlet and outlet are carried out through one of the connections; bidirectional. Alternatively, a circuit flushing system is also available which, in addition to cleaning the oil in the working circuit, also offers a cooling function.

Series 90 - advanced technology of today
Adjustable pumps in seven sizes
Fixed displacement motors in five sizes
Variable displacement motors
SAE and slide-in mounting configurations
Efficient axial piston design
Proven reliability and performance
Lightweight and compact
Worldwide sales and service

Series 40 axial piston variable displacement motors

Series 40 motors can transmit and control hydraulic power together with other components of a system.

The M25 size motor is only available as a fixed displacement motor, all other sizes (M35, M44 and M46) are available as both fixed and variable displacement motors.

With these axial piston designs with fixed or variable swashplate, speeds between zero and maximum can be achieved in both forward and reverse operation. They are compact units with a high power density (maximum 345 bar). The change in stroke volume is achieved by parallel axial pistons with sliding shoes that slide on an adjustable swash plate.
Swinging the swash plate in the opposite direction reverses the flow direction of the volume flow and thus changes the running direction of the motor.

The M35 and M44 motors operate with direct displacement limitation. The variable displacement motor size M46 operates with hydraulic 2-point adjustment and is also available as a slide-in motor, suitable for the compact wheel and chain drives (CW12, CW18 and CT18, CT26, CT35).

4 sizes of constant motors
3 sizes of variable speed motors
Variable speed and controller range - Developed for state-of-the-art drive systems
High reliability thanks to intensive field testing
Optimum usability thanks to standardized connections and modular design
Compact
Low noise
Worldwide sales and service

L and K Series motors

The L and K series motors are axial piston motors with 2-point adjustment for applications in the medium pressure range. The motors are designed for closed or open circuit applications and are available in five displacements (25cm³/rev - 45cm³/rev) and two different housing designs (SAE-B or cartridge).
L and K motors are hydraulically adjusted via an integrated adjusting cylinder and kept at maximum displacement without pressure by spring return. The minimum and maximum displacement can be limited to the desired values using different internal stops.
The generously dimensioned adjustment cylinder ensures smooth acceleration and deceleration with the aid of the corresponding nozzle.
The units are very compact and can be installed in a space-saving manner. The pressure connections are located either radially or axially in the end housing.

Main features

Optimum motor selection thanks to 5 different displacements: 25 - 30 - 35 - 38 - 45 cm³/rev
SAE-B (2-hole) or cartridge front flange available
Short and compact design
High efficiency thanks to 9-piston rotary group and 18° swashplate angle
Versatile conversion range of 3.4:1 with a minimum displacement of up to -1° (negative displacement, optional)
Maximum reliability thanks to proven technology
Worldwide service and technical support

Axial piston motors