A2FO A2FM A2FE Fixed Displacement Piston Motor A2FM107/61W-VZB010 Hydraulic Motor A2FM10/16/23/45/63/90/107 OEM

I. Technical Parameters
Core performance parameters
– Motor type: Inclined shaft axial piston quantitative motor, bidirectional rotation design, closed circuit adaptation, providing low-speed and high-torque rotational power for medium and large-sized actuators.
– Displacement and pressure parameters: Rated displacement 107 mL/r; Rated working pressure: 31.5 MPa, maximum allowable pressure: 35 MPa (short-term ≤10 seconds); Rated speed: 1500 r/min, maximum speed: 2000 r/min (short-term ≤5 minutes), minimum stable speed: 40 r/min.
Torque and efficiency parameters: The rated torque at the rated speed is 170 N·m, and the starting torque is ≥ 92% of the rated torque. Volumetric efficiency ≥93%, total efficiency ≥88%; Rated flow rate: 160.5 L/min (at a pressure difference of 1 MPa).
– Operating characteristics: Continuous operating oil temperature ≤85℃, rated working condition noise value ≤86 dB (measured at 1 meter); The fault-free operating life under rated conditions is ≥ 12,000 hours.
2. Structure and connection parameters
– Structural type: Inclined shaft axial piston structure, integrating alloy cast iron housing, alloy steel piston pair, copper alloy cylinder block, roller bearing and bidirectional combined seal; It adopts pressure-compensating end face seal, with low leakage under high pressure. The shell is equipped with a flange mounting seat, suitable for rigid fixation.
– Core material: The plunger is made of chromium-molybdenum alloy steel (surface nitrided treatment, hardness HRC60-63); The cylinder body is made of tin bronze ZCuSn10Pb5 (hardness HB240-280). The swash plate is made of alloy steel with a ceramic coating (hardness above HV900). The sealing part is a high-pressure resistant fluororubber combination (temperature resistance ≤110℃).
– Connection specification: The oil port connection is threaded (the working oil port of A/B is G1.25″, and the return oil port of T is G1″). The output shaft is spline connected (specification 25×50). Install flange bolts with a center distance of 180×140 mm. The motor weighs approximately 45 kg, and its external dimensions (length × width × height) ≈520×380×320 mm.
3. Medium and Environmental requirements
– Medium requirements: L-HM 46 anti-wear hydraulic oil is suitable for normal temperature. L-HM 32 is selected for low-temperature environment (below -25℃). The allowable viscosity of the medium is 15-400 mm²/s, and the moisture content is ≤0.02%. It is strictly prohibited to use media containing solid particles (particle size > 10 μm) or corrosive media.
– Cleanliness standard: The oil cleanliness should reach ISO 4406 15/12 grade. A 10 μm filter should be placed in front of the oil inlet. The filter should be replaced immediately when the pressure difference of the filter is greater than 0.15 MPa.
– Environmental parameters: Operating environment temperature -30℃ to 90℃, relative humidity ≤95% (short-term condensation is allowed); With a protection grade of IP65, it is suitable for construction machinery, industrial drive equipment, and heavy-duty mining scenarios.Ii. Working Principle
This motor is an inclined shaft axial piston quantitative motor. Its core converts hydraulic energy into mechanical energy through the mechanism of “high-pressure oil driving the piston to reciprocate – cylinder rotation doing work – bidirectional torque output”. The specific process is as follows:
1. Forward rotation process
High-pressure oil enters the inner cavity of the motor housing through port A and acts on the end face of the plunger. Due to the fixed inclination Angle between the inclined shaft and the cylinder block, the high-pressure oil pushes the plunger to reciprocate along the cylinder block hole while driving the cylinder block to rotate around the center of the output shaft. The cylinder block is rigidly connected to the output shaft through splines, transmitting the rotational torque to the load to achieve forward power output. The low-pressure oil after doing work is collected through port B and discharged from Port T, completing the energy conversion.
2. Reverse rotation process
When the high-pressure oil is switched to the B port input, the oil acts on the other end face of the plunger, pushing the plunger to move back and forth in the opposite direction, and driving the cylinder body and the output shaft to rotate in the opposite direction. Low-pressure oil is discharged through Port A and Port T, achieving seamless bidirectional rotation switching. Throughout the entire process, the pressure compensation sealing ring, under the action of high-pressure oil, closely adheres to the end face of the cylinder block, automatically compensating for the wear clearance and maintaining high volumetric efficiency.
3. Overload and stability guarantee
The relief valve matched with the system automatically opens when the motor load exceeds the rated torque by 1.2 times, discharging some high-pressure oil back to the oil tank to prevent the plunger and cylinder block from getting stuck or worn due to overload. The one-way oil replenishment valve built into the motor can prevent the “load drop” caused by the reverse flow of oil when the machine stops, enhancing the safety of the operation.

Iii. Product Features and Advantages
– Outstanding low-speed high-torque performance: With a 107 mL/r displacement and an inclined shaft structure, the rated torque reaches 170 N·m. At the lowest stable speed of 40 r/min, the torque fluctuation is ≤3%. It can drive heavy loads (such as 20-ton excavator rotary platforms) without additional reduction devices, and the torque density is 50% higher than that of gear motors of the same power.
– Precise and stable bidirectional operation: The symmetrical plunger layout achieves bidirectional equal torque output, with the error between the forward and reverse rotational speeds and torque being ≤2%. The pressure compensation seal design ensures that the volumetric efficiency remains stable at over 93% for a long time. The bidirectional switching response time is ≤50 ms, making it suitable for frequent reversing scenarios (such as winch lifting/lowering).
– Wear-resistant, impact-resistant and long service life: The wear-resistant combination of nitrided plunger and ceramic-coated inclined plate, combined with the precise fit of tin bronze cylinder body, has an impact resistance performance that is 60% higher than that of ordinary plunger motors. The fault-free life under rated working conditions is ≥ 12,000 hours, and the operation and maintenance frequency is 40% lower than that of gear motors of the same level.
– Strong installation adaptability: Standardized flange and spline connection, which can directly replace products of the same specification but different brands. With an IP65 protection rating, it can resist dust and water splashing. The wide temperature range design from -30℃ to 90℃ is suitable for harsh working conditions such as high-cold mines and high-temperature infrastructure, and the installation and commissioning efficiency is increased by 50%.

Iv. Usage Functions and Purposes
1. Core usage functions
– Heavy-duty rotary drive: Converts hydraulic energy into low-speed and high-torque mechanical energy to drive heavy-duty actuating components such as rollers, rotary platforms, and wheels, replacing the “motor + reducer” combination. It is suitable for environments without power supply or explosion-proof conditions (such as underground equipment in mines).
– Bidirectional precise reversing: It can achieve forward and reverse rotation without additional reversing valves, and the switching process is shock-free. It is suitable for the bidirectional action requirements of winches such as “lifting – lowering” and conveying equipment such as “forward – backward”, simplifying the system control loop.
– Stable pressure-holding output: Under constant load (such as positioning on a rotary platform), it can maintain a stable torque output, with pressure fluctuations ≤0.5 MPa, making it suitable for heavy-duty operation scenarios that require precise positioning.
2. Main application fields
In the field of construction machinery: 20-30 ton excavator slewing mechanism, 10-20 ton hydraulic winch lifting drive, large loader steering drive, crawler crane luffing mechanism, suitable for outdoor heavy-load operations.
– Industrial drive field: Drum drives for large conveying equipment, tilting mechanisms for converters in the metallurgical industry, slewing drives for port cranes, and stirring mechanisms for heavy-duty mixing tanks, suitable for continuous heavy-load production scenarios in industry.
– Specialized fields in mining: cutting drive for underground tunnel boring machines in mines, drive for scraper conveyors in coal mines, and hoisting mechanisms for small mine winches, suitable for harsh underground conditions with much dust and high impact.

V. Applicable Machines and Scenarios
1. Adapt to the core machine
– Construction machinery: 20-30 ton excavators, 10-20 ton hydraulic winches, 15-25 ton loaders, crawler cranes under 50 tons.
– Industrial equipment: Large belt conveyors, 100-200 ton converters, small and medium-sized cranes in ports, heavy-duty mixing tanks.
– Mining equipment: underground roadheaders, coal mine scraper conveyors, small mine winches.
2. Typical application scenarios
– Excavator rotation scene: As a rotary motor for a 25-ton excavator, when the input pressure is 30 MPa and the flow rate is 150 L/min, the output speed is 120 r/min and the torque is 165 N·m. It drives the rotary platform to rotate smoothly at 360°, with a positioning accuracy of ≤0.5°. With IP65 protection, it is suitable for the dusty environment in mines and can work for an average of 12 hours per day without failure.
– Hydraulic winch scenario: Equipped with a 15-ton hydraulic winch, it outputs low speed and high torque (speed 50 r/min, torque 170 N·m), driving heavy objects to lift at a constant speed. The bidirectional switching response is rapid, suitable for port cargo hoisting operations. It can continuously lift 10 times (12 tons each time) with stable performance.
– Belt conveyor scenario: Driving large-scale mine belt conveyors, with an output speed of 600 r/min and a torque of 160 N·m, it drives the rollers to rotate, with a conveying speed of 1.5 m/s. The shock-resistant design is adapted to the load fluctuations during ore conveying, and it can operate continuously for 24 hours without any abnormalities.

Six. Similar models
1. Alternative models of the same series
-A2FM80/61W-VZB010: A small-displacement model of the same structure, with a rated displacement of 80 mL/r and a rated torque of 128 N·m. The pressure parameters are consistent, suitable for 15-20 ton equipment (such as 15-ton excavator rotation), and the cost is 25% lower than that of the original model.
-A2FM125/61W-VZB010: A large-displacement model of the same series, with a rated displacement of 125 mL/r and a rated torque of 198 N·m. The pressure parameters are the same. It is suitable for equipment ranging from 30 to 40 tons (such as 30-ton excavator rotation), but the cost is 30% higher than that of the original model.
2. Cross-series alternative models
-A2FM107/61W-VZB011: Different installation form models (flange to foot mounting), with exactly the same performance parameters, suitable for scenarios without flange installation Spaces (such as agitators), and the cost remains the same.
-A2FM107/63W-VZB010: High-pressure enhanced model, rated working pressure 35 MPa, consistent displacement and torque parameters, suitable for high-pressure heavy-duty systems (such as 20-ton mine winches), with a cost 28% higher than the original model.
-A2FM107/61W-VZB012: Variable control model (displacement can be adjusted from 40% to 100%), suitable for variable speed scenarios (such as fast and slow lifting of the winch), with a cost 50% higher than the original model.