Available in displacements from 8 to 50 c.c./rev., the BMM series supports multiple configurations, including round or diamond mounting flanges, keyed or splined shafts, side or rear ports, and both clockwise and counterclockwise rotation. An optional external drain port is also available, providing enhanced flexibility and reliable performance across a wide range of industrial and mobile hydraulic systems.

Feature

• The integrated stator adopts the world's advanced processing technology to ensure the whole motor is small in size, high efficiency, high speed and long life.
• The shaft seal is high-pressure-bearing and can be used in serial or parallel.
• Advanced structural design, high power and high torque.

Application

• Construction machinery : widely used in construction machinery such as excavators, cranes and loaders. It is mainly used to drive working devices, such as slewing mechanisms and walking mechanisms. Due to its high torque and high efficiency characteristics, it can effectively improve working efficiency.
• Machine tool industry : suitable for spindle drive, providing high-speed and high-precision power to meet the demand for high-speed machining.
• Saw machine industry : It can be used with wire brushes for rolling chips during processing and removing iron chips.
• Injection molding machinery : As one of the main driving elements of the injection molding machine, it converts mechanical energy into hydraulic energy, drives the opening and closing of the mold and feeds the hopper, etc.
• Metallurgical industry : plays an important role in the start, stop and control of metallurgical equipment, suitable for use in various metallurgical processing equipment
• Agricultural equipment : used in various agricultural machinery, such as tractors and harvesters.

Code

Model Code

Product Series	Displacement	Mounting surface type	Shaft type	Port specs	Direction ofrotation	Painting Options	Special features
BMM	8	M	A	E	*	00	*

Displacement:

8、12.5、20、32、40、50

Mounting surface type:

M: 3-M6 Round flange, Outlet Ø31.5×5
U: 3-1/4-28UNF Round flange, Outlet Ø31.5×5
F:2-Ø9 Rhombus flange, Outlet Ø63×2

Shaft type:

A: Ø16,Cylindrical shaft5×5×16
B: Ø15.875,Cylindrical shaft4.8×4.8×19.05
C: Ø16.5,Spline shaftB17×14,DIN5482

Port specs:

E: Side G3/8DrainG1/8
U: Side9/16-18UNFDrain3/8-24UNF
1E: RearG3/8DrainG1/8
1U: Rear9/16-18UNFDrain3/8-24UNF

Direction of rotation:

*None: Clockwise
R: Counterclockwise

Painting Options:

B: Black
*None: Blue
00: No pain
S: Silver gray

Special features:

*None: Drain
0: No Drain

Data

Technical Data

In different displacement scenarios, the corresponding technical data includes values for speed (rpm), torque (N•m), output power (kW), working pressure difference (bar), flow (L/min), weight (kg), and maximum inlet pressure (bar). These figures are provided for rated, continuous, intermittent, and peak operating conditions.

• Rated speed and torque refer to the output value at rated flow and pressure.
• The continuous value refers to the maximum value at which the displacement motor can operate continuously.
• The intermittent value refers to the maximum value of the displacement motor operating for 6 seconds within 1 minute.
• The peak value refers to the maximum value of the displacement motor operating for 0.6 seconds within 1 minute.

DWG

Measurement

Notice

Optimal Operating Conditions

1. Oil Temperature: Normal working range 20℃-60℃, maximum system temperature 90℃ (not exceeding 1 hour).
2. Oil Filtration & Cleanliness: Oil filter precision 80-100 microns (150-180 mesh). Magnetic blocks recommended at the bottom of the tank to prevent metal debris from entering the system. Hydraulic oil contamination level should not exceed ISO 19/16 (NAS-10 level).
3. Oil Viscosity: Kinematic viscosity at 40℃ should be 42-74 cSt, depending on operational and environmental conditions.
4. Motor Connection: Can be used in series or parallel. If back pressure exceeds 100 bar (speed below 200 rpm), an external drain port must be used, preferably connecting it directly to the oil tank.
5. Best Operating Range: Select operation within continuous maximum limits.
6. Extended Motor Life: Before applying full load, operate at 30% of rated pressure for approximately 1 hour. Always ensure the motor is fully filled with hydraulic oil before applying load.

For special requirements, please contact us.

Series Data List

Model	Displacement (c.c./rev.)	Max. pressure (bar)	Speed (rpm)	Output power (kW)
BMM	8~50	140	40-1950	3.2

Download

CML-BMM-EN-2501.pdf

Download