DAN FOSS Hydraulic Axial Piston Motor MMF035DAAMABNNN

Model Structure Decomposition and Meaning
The Danfoss MMF series models follow a standard coding rule, where each letter/number represents a specific attribute.

MMF035 D A A M A B N N N
1. MMF - Product Series
MMF: Danfoss "Plus+1 ®" High speed axial piston motor series under the platform. It is a modernized upgraded product of the previous generation 51/52 series
2. 035- Specification displacement
035: Represents a theoretical displacement of 35 cc/rev for the motor. This is the volume of oil discharged by the motor for each rotation, which is the core parameter determining its output torque.
3. D - Rotation axis type
D: The representative shaft end is a rectangular spline shaft. This is a very common form of output shaft used to transmit high torque.
4. The first A - control mode
A: Represents hydraulic control. Usually refers to controlling the tilt angle of the motor's swash plate through external pilot oil pressure, thereby achieving stepless changes in displacement.
(Other common codes: E=electro-hydraulic proportional control, H=manual control, L=hydraulic remote control, etc.).
5. Second A - Variable Mechanism Type
A: Represents an HD type variable mechanism. This is a mechanism used to implement bidirectional variables. The inclined plate of the motor can tilt in both forward and reverse directions, allowing the motor to rotate in both directions, and the displacement can continuously change from zero to the maximum positive displacement, then to zero, and finally to the maximum negative displacement.
This is a key feature of the model, indicating that it is a true bidirectional continuously variable motor.
6. M - Displacement control feedback type
M: Represents mechanical feedback. The position of the inclined plate of the motor (i.e. the current displacement) is fed back to the control valve core through a mechanical linkage or mechanism, forming a closed-loop control that makes the displacement accurately proportional to the control signal.
7. Third A - Install flange and port
A: Representing standard SAE flanges and ports. Specifically, it is an SAE 2-bolt flange with SAE straight threaded oil ports. This is an industry standard that is easy to integrate.
8. B - Rotation direction
B: From the perspective of the shaft end, the standard rotation direction. Usually refers to the clockwise rotation of the motor shaft when oil enters port A (returns oil to port B) when viewed from the shaft end.
(L=reverse rotation).
9. First N-shaft seal type
N: Representing standard nitrile rubber oil seals, suitable for mineral oil-based hydraulic oils.
10. Second N - Special Configuration
N: Represents no special requirements/standard configuration.
11. Third N - Special Configuration
N: Represents no special requirements/standard configuration.

Summary of Product Features and Technical Characteristics
Core function: Bidirectional, stepless variable axial piston hydraulic motor.
Displacement: 35 cc/rev, belonging to small and medium displacement motors.
Control method: Hydraulic pilot control (HD type variable mechanism), which can proportionally control the displacement and rotation direction of the motor through an external pilot pressure signal (usually around 0-30 bar).
Zero position: When the pilot pressure is at the intermediate value, the swash plate returns to zero, the displacement is zero, and the motor does not rotate or output torque (hydraulic braking state).
Forward rotation: As the pilot pressure increases from the intermediate value in a certain direction, the motor rotates forward and the displacement increases proportionally.
Reverse: The pilot pressure increases from the middle value in the opposite direction, causing the motor to rotate in reverse and the displacement to increase proportionally.
Typical applications:
Walking machinery: Static hydraulic walking drive (HST) for vehicles, such as walking systems for combine harvesters, forklifts, tractors, and small rollers. Realize continuously variable transmission and reversing by controlling the displacement.
Industrial applications: Rotating mechanisms that require precise speed control and direction reversal, such as winches, rotary drives, mixers, etc.
Advantages:
High integration, integrating the motor body, variable mechanism, and control valve together.
Fast response speed and precise control.
High power density and compact structure.

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