BMM Hydraulic motor
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Category: Hydraulic motor
Tags: BMM hydraulic motor, BMP Hydraulic motor, BMR Hydraulic motor
Description
BMM Series Hydraulic Motor: Specifications, Features & Applications
The BMM series hydraulic motor is a compact, economical orbital hydraulic motor designed for converting hydraulic energy into rotational mechanical power, widely used in various industrial and mobile applications. With its advanced gerotor gear set design and shaft distribution flow structure, it stands out for high efficiency, long service life, and excellent performance in medium and low load scenarios.
BMM Series Hydraulic Motor Core Features
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Compact & Lightweight Design: Adopting gerotor gear set and advanced structural design, the BMM series hydraulic motor features small volume and low weight, making it easy to integrate into various machinery and equipment, even in limited installation spaces.
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High Efficiency & Long Service Life: Manufactured with advanced equipment for the gerotor gear set, the motor ensures high energy conversion efficiency and stable operation, effectively extending its service life in long-term work.
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High-Pressure Shaft Seal: The shaft seal of the BMM hydraulic motor can withstand high pressure, allowing the motor to be used in parallel or series circuits, enhancing its versatility in different hydraulic systems.
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Stable Performance: With axial oil distribution structure (or shaft distribution flow design), the motor maintains stable torque and speed output, even under intermittent operation conditions, meeting the requirements of various working scenarios.
BMM Series Hydraulic Motor Technical Specifications
|
Model
|
Geometric Displacement (cm³/rev)
|
Continuous Speed (rpm)
|
Intermittent Speed (rpm)
|
Continuous Torque (N·m)
|
Intermittent Torque (N·m)
|
Continuous Output Power (kW)
|
Weight (kg)
|
|---|---|---|---|---|---|---|---|
|
BMM 8
|
8.2
|
1950
|
2450
|
11
|
15
|
1.8
|
1.9
|
|
BMM 12.5
|
12.9
|
1550
|
1940
|
16
|
23
|
2.4
|
2.0
|
|
BMM 20
|
19.9
|
1000
|
1250
|
25
|
35
|
2.4
|
2.1
|
|
BMM 32
|
31.6
|
630
|
800
|
40
|
57
|
2.4
|
2.2
|
|
BMM 40
|
39.8
|
500
|
630
|
45
|
70
|
2.2
|
2.3
|
|
BMM 50
|
50.3
|
400
|
500
|
46
|
88
|
1.8
|
2.4
|
Note: Continuous pressure (cont.) refers to the maximum value for continuous motor operation; Intermittent pressure (int.) refers to the maximum value for 6 seconds of operation per minute; Peak pressure refers to the maximum value for 0.6 seconds of operation per minute.
BMM Series Hydraulic Motor Applications
The BMM series hydraulic motor is widely used in various fields due to its compact design and stable performance, suitable for light to medium load and intermittent operation scenarios:
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Agricultural Machinery: Combine harvesters, seeders, rotary tillers, lawn mowers, sprayers, feed mixers, and ground boring machines.
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Construction Machinery: Rollers, cement mixers, sweepers, and small construction equipment.
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Industrial Machinery: Winding machines, textile machines, printing presses, and commercial washing machines.
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Other Fields: Fisheries netting machines, plastic machinery, machine tools, and mining machinery.
BMM Series Hydraulic Motor Operation Notes
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The normal oil temperature should be 20°C – 60°C, with a maximum of 90°C (no more than one hour).
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System filtration should be 10 µm nominal, and a magnet is recommended to be installed in the filter or at the bottom of the oil tank to prevent contamination.
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Recommended oil viscosity is 32 – 74 mm²/s, adjusted according to ambient temperature and application type.
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The motor should be filled with oil before being put under load, and it is recommended to operate under 30% of rated pressure for the first hour to extend service life.
The BMM hydraulic motor is an ideal choice for small and medium-sized machinery that requires compact structure, high efficiency, and reliable performance. Its versatile design and wide application range make it a cost-effective solution for hydraulic drive systems in various industries.

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