M5AF Series High Pressure Fixed Displacement Hydraulic Piston Motor

Wuhan Xinlaifu Hydraulic Equipment Co., Ltd. is one of the leading manufacturers and suppliers of m5af series high pressure fixed displacement hydraulic piston motor in China. With abundant experience, we warmly welcome you to buy high quality customized products at competitive price from our factory. Also, OEM&ODM service is available.

 

 M5AF Series High Pressure Fixed Displacement Hydraulic Piston Motor

 

 

In heavy industries such as metallurgy, mining, and shipping, many devices rely on stable high-pressure hydraulic power to perform key actions such as rotation and driving - for instance, the drum drive of a mine crusher and the lifting operation of a ship deck winch. These scenarios have extremely high requirements for the pressure stability and torque strength of power output. The Parker M5AF Series High Pressure Fixed Displacement Hydraulic Piston Motor is precisely designed for such heavy-load conditions. As the core series of the parker M5AF motor, It can continuously output strong power in high-pressure environments, ensuring that the equipment still operates efficiently under heavy loads and high-frequency operations. ​
As a professional High Pressure hydraulic motor, its fixed displacement design combined with a high-strength plunger structure can provide stable torque output at the rated pressure. Whether it is the rotating mechanism driving large-scale stirring equipment or providing power for heavy conveying machinery, it can break through the load limit by virtue of its high-pressure characteristics and avoid operation interruption caused by insufficient power. This reliability makes the parker M5AF motor an ideal drive unit in industrial high-pressure hydraulic systems. ​

 

 

The core advantage of High Pressure hydraulic motor is fully reflected in the M5AF series: Its rated working pressure can reach 350bar, and the peak pressure can even withstand an instantaneous impact of 420bar, far exceeding the pressure upper limit of ordinary hydraulic motors. This high-pressure characteristic enables the parker M5AF motor to drive large inertial loads - for instance, when the winch of a port crane lifts heavy objects, the motor can instantly output a large torque to ensure the smooth lifting of the heavy objects. In the roll drive of metallurgical equipment, even if the rolls are subjected to huge resistance during metal rolling, they can still maintain a stable rotational speed to ensure rolling accuracy. ​
Meanwhile, the fixed displacement design ensures uniform flow output, and in combination with the high-pressure characteristics, it forms a power combination of "high pressure + stable flow". Compared with variable motors, High Pressure hydraulic motors have smaller flow fluctuations (≤±2%) under high-pressure working conditions. This is crucial for equipment that requires uniform operation (such as the conveying rollers of continuous steel casting machines), and it can effectively avoid product quality problems caused by rotational speed fluctuations. ​

 

The parker M5AF motor adopts a high-strength alloy cylinder block and hardened plunger assembly. The key friction pairs undergo mirror grinding treatment (surface roughness Ra≤0.02μm), and the wear resistance under high pressure is improved by 30%. Its sealing system is made of high-pressure resistant fluororubber material, which can maintain sealing performance under long-term high-pressure action and prevent pressure loss caused by hydraulic oil leakage. Even in harsh environments such as mine dust and damp ships, the parker M5AF motor can still operate stably, with an average mean time between failures of more than 8,000 hours. ​
Furthermore, the overall structure of the High Pressure hydraulic motor has been optimized for anti-vibration and can withstand the high-frequency vibration (vibration acceleration ≤10g) during the operation of the equipment. In the hydraulic winch drive of heavy-duty trucks, even when the vehicle is traveling on bumpy roads, the motor can maintain a stable power output, ensuring that the winch's lifting action is not affected. ​

 

 

• High-pressure impact-resistant design: The cylinder body of the High Pressure hydraulic motor adopts the integral forging process, with a compressive strength of up to 600MPa. It can withstand frequent high-pressure impacts - for example, the instantaneous load change when the crusher crushers hard rock. The pressure response time of the motor is ≤0.1 seconds, avoiding the impact damage to the equipment caused by pressure fluctuations. ​
• High-efficiency power conversion: The fixed-displacement structure reduces energy loss in variable regulation, with a mechanical efficiency of ≥92%. Under high-pressure conditions, the energy conversion rate is 8%-10% higher than that of ordinary motors. This means that under the same hydraulic oil consumption, parker M5AF motor can output more effective power and reduce system energy consumption. ​
• Wide speed adaptation: The speed range covers 50 to 3000rpm and can be adjusted to meet the speed requirements of different devices by regulating the flow rate. For instance, in the drive of ship anchor engines, it can not only provide high torque for anchoring at low speed but also complete the recovery of anchor chains at high speed without the need for additional speed-changing mechanisms. ​
• Convenient maintenance: The modular design enables core components (such as plungers and distribution plates) to be replaced separately, eliminating the need to disassemble the entire motor during maintenance. With standardized interfaces, the replacement cycle is 40% shorter than that of similar products, reducing equipment downtime.

 

 

 

 

Model	Shaft code	Shaft type	L1	L2	DIA	K1xK2	H1	M1
M5AF	1	ConeSAE-BB(No key)	75.4	56.4	25.40±0.25 (125: 1000+M16)			●R=4.0
	2	Keyed:非Non SAE	108.1	23.5	25.400-25.350	6.35×6.35	28.2
M5B	2	Keyed:ISOR775(φ25)	70	40	25.0065-24.9935	8.000-7.948	28.22
	3	Splined:SAE-B	41.4	24.5	SAE J498b class 1,Diametral pitch 16/32,13T
M5BS	1	Keyed:SAE-B(φ22.2)	71.4	38.1	22.225-22.200	6.35-6.30	24.94
	3	Splined：SAE-B	41.4	24.5	SAE J498b class 1,Diametral pitch 16/32,13T
M5BF	1	Cone SAE-BB(+Key)	72.9	54	25.40±0.25(125: 1000+M16)	6.35-6.30		0R=4.0
	3	Keyed:ISO3019/2 G32N	128	50	32.013-31.997	9.97×10.00	35.2	M1=M10×20

 

 

 

Series	Flow code	Geometric displacement	Specific torque	100rpm Power	Standard	S series	Housing	Rated pressure			low pressure
								Cortinuity Interm		Standard	S seriós S
		ml/rev	Nm/bar	kwlbar	bar	bar	bar	rpm rpm		rpm	rpm
M5AF	6	6	0.095	0.001	300/250		3.5	3000		6000	-
	8	8	0.127	0.0013
	10	10	0.159	0.0017
	12	12	0.191	0.002
	18	18	0.286	0.003
	23	23	0.366	0.0038	280/250
	25	25	0.398	0.0042	250/250			2000		3000
M5B M5BF	12	12	0.191	0.002	320/290		3.5	3000		6000
	18	18	0.286	0.003
	28	28	0.446	0.0047				2500		4000
	36	36	0.572	0.006
	45	45	0.716	0.0075	280/260					3000
M4C M4SC	24	24.4	0.39	0.004	175	230	3.5	2500	3600	4000 (@35bar)	4000 (@80bar)
	27	28.2	0.45	0.0047
	31	34.5	0.55	0.0058
	43	46.5	0.74	0.0078
	55	58.8	0.93	0.0098		210
	67	71.1	1.13	0.012
	75	80.1	1.27	0.013		175
M4D M4SD	62	65.1	1.04	0.011	175	230	3.5	2500	3000	4000 (@35bar)	4000 ((@8Obar)
	74	76.8	1.22	0.013
	88	91.1	1.45	0.015
	102	105.5	1.68	0.018		210
	113	116.7	1.86	0.02
	128	132.4	2.11	0.022		190
	138	144.4	2.3	0.024		175
M4E M4SE	153	158.5	2.52	0.026		190	3.5	2500	3000	4000 (@35bar)	4000 (@80bar)
	185	191.6	3.05	0.032	175	180
	214	222	3.53	0.037		175

 

(bar)3Minimum oil pressure(bar)
Model			Rotational speed (RPM), when the oil viscosity is 32cst
	500	1000	2000	3000	3600
M5A	1.4	1.7	2.7	4.2	6
M5B	1.4	1.7	2.7	4.2	6
M4C	0.7	1.4	3.1	5.5	9.3
M4D	0.7	1.4	3.1	5.5	9.3
M4E	1.4	2.8	5.2	11	-

 

To protect your rights please read the following carefully Pump Start-up Procedure Preparation Prior to Start-up The reservoir and circuit should be clean and free of dirt and debris prior to filling with fluid. Circuit Cleanup The reservoir should be charged with filtered hydraulic fluid. The fluid level should be sufficient to prevent vortexing at the suction connection to the pump inlet. It is good practice to clean the system by flushing and filtering, using an external slave pump. Filling Pump and Removing Air If the pump is mounted above the fluid level, it should be filled with fluid through the outlet port. If the pump is mounted below the fluid level, the pump outlet fitting (or other downstream fitting or plug) can be loosened to allow fluid to displace the air. It may be necessary to loosen the fill cap on the reservoir to allow the fluid to flow freely. When a solid stream of fluid with no observed air begins to drain through the loosened fitting, the fitting should be retightened. An air bleed valve in the outlet circuit is also recommended to remove trapped air. If such a device is used, the pump should be filled with fluid before start-up. In some cases, it may be possible to prime the pump by running the engine starter for five to ten seconds with the throttle and/or ignition switch in the "off" position. It will be necessary to loosen a fitting or plug in the pump outlet to allow air to escape. Pump Start-up All controls should be placed in the neutral position so the pump is unloaded when started. Start the engine and run at low idle. Once the pump is started, it should prime and pump within a few seconds. If it does not, make sure there are no restrictions between the reservoir and the inlet to the pump, and that there are no air leaks in the inlet line and connections. Also, make sure that trapped air can escape from the outlet. Run at low engine idle for approximately five minutes. Then, while observing the reservoir fluid level, operate the implements. Extend all actuators to maximum safe limits to completely fill the system with fluid. Do not run with the fluid level below the "low" limit. Add fluid to the reservoir to bring the fluid to the proper fill level.

 

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