BMM Series Hydraulic Motor
Products: Orbital Hydraulic Motors
The BMM series cycloidal hydraulic motor is a miniature shaft-type motor designed for installation in very confined spaces. Featuring a column-type rotor-stator assembly and a 4/5-tooth configuration, it offers a compact design, low weight, and high power density.
Description:
BMM hydraulic motors are built for continuous duty and easy integration into a wide range of hydraulic systems. Their compact structure, high efficiency, and strong output torque make them suitable for drive functions in mobile and industrial equipment.
Key Specifications
- Miniature shaft-type orbital hydraulic motor for confined installation spaces.
- Nominal displacement range: 8–50 cm³/rev.
- Actual displacement range: 8.2–51.1 cm³/rev.
- Max. continuous working pressure difference: up to 10 MPa.
- Max. continuous torque: up to 58 N·m.
- Max. inlet pressure: 10 MPa continuous / 14 MPa intermittent.
- Compact design with low weight and high power density.
- Suitable for agricultural, construction, mobile and industrial machinery.
BMM Series Technical Data
Compare model-specific displacement, speed, torque, pressure difference and flow ratings for preliminary selection.
BMM 8
- Actual Displacement: 8.2 cm³/rev.
- Max. Speed: 1,950 / 2,450 rpm
- Max. Torque: 11 / 15 N·m
- Max. Working Pressure Difference: 10 / 14 MPa
- Max. Flow: 16 / 20 L/min
Continuous / Intermittent values.
BMM 12.5
- Actual Displacement: 12.9 cm³/rev.
- Max. Speed: 1,550 / 1,940 rpm
- Max. Torque: 16 / 23 N·m
- Max. Working Pressure Difference: 10 / 14 MPa
- Max. Flow: 20 / 25 L/min
Continuous / Intermittent values.
BMM 20
- Actual Displacement: 20.4 cm³/rev.
- Max. Speed: 931 / 1,220 rpm
- Max. Torque: 25.6 / 36 N·m
- Max. Working Pressure Difference: 10 / 14 MPa
- Max. Flow: 20 / 25 L/min
Continuous / Intermittent values.
BMM 32
- Actual Displacement: 32.7 cm³/rev.
- Max. Speed: 581 / 757 rpm
- Max. Torque: 41 / 59 N·m
- Max. Working Pressure Difference: 10 / 14 MPa
- Max. Flow: 20 / 25 L/min
Continuous / Intermittent values.
BMM 40
- Actual Displacement: 40.9 cm³/rev.
- Max. Speed: 465 / 606 rpm
- Max. Torque: 46 / 72 N·m
- Max. Working Pressure Difference: 9 / 14 MPa
- Max. Flow: 20 / 25 L/min
Continuous / Intermittent values.
BMM 50
- Actual Displacement: 51.1 cm³/rev.
- Max. Speed: 372 / 484 rpm
- Max. Torque: 58 / 91 N·m
- Max. Working Pressure Difference: 9 / 14 MPa
- Max. Flow: 20 / 25 L/min
Continuous / Intermittent values.
Max. Inlet Pressure
9 MPa rated / 10 MPa continuous / 14 MPa intermittent.
Operating Definitions
Continuous values refer to the maximum values at which the motor can operate continuously.
Intermittent values refer to the maximum values at which the motor operates for up to 6 seconds within one minute.
Peak values refer to the maximum values at which the motor operates for up to 0.6 seconds within one minute.
Values shown are for preliminary model selection. Refer to the PDF datasheet for rated and peak values, detailed performance data, installation dimensions and ordering information.
Available Configurations
Multiple flange, shaft, port and rotation options are available for different equipment and hydraulic system requirements.
Mounting Flanges
- M – 3-M6 round flange, pilot Ø31.5 × 5 mm
- U – 3-1/4-28 UNF round flange, pilot Ø31.5 × 5 mm
- F – 2-Ø9 diamond flange, pilot Ø63 × 2 mm
Shaft Options
- A – Ø16 mm straight shaft, 5 × 5 × 16 mm parallel key, length 28.5 mm, M6
- B – Ø15.875 mm straight shaft, 4.8 × 4.8 × 19.05 mm parallel key, length 28.5 mm, 1/4-28 UNF
- C – Ø16.5 mm involute spline shaft, B17 × 14 (DIN 5482), length 28.5 mm, M6
Port Options
- E – G3/8 main ports with G1/8 drain port
- U – 9/16-18 UNF O-ring main ports with 3/8-24 UNF O-ring drain port
- 1E – Rear ports: G3/8 main ports with G1/8 drain port
- 1U – Rear ports: 9/16-18 UNF O-ring main ports with 3/8-24 UNF O-ring drain port
Rotation Options
- Standard rotation
- Reverse rotation
Facing the motor shaft extension, pressurizing port A produces clockwise rotation; pressurizing the opposite port produces counterclockwise rotation.
Available configurations may vary by displacement and installation type. Please provide the existing model, nameplate, mounting dimensions, shaft details and port specifications for final confirmation.
Designed for endurance & efficiency
High starting torque
Stable output and smooth running at low speed.
Compact design
Easy to install where space is limited.
Reliable sealing
Helps reduce leakage and supports long service life.
Versatile applications
Suitable for agricultural, construction, and industrial machinery.
Applications
Harvesting equipment
Tractors & attachments
Precision Farming Solutions
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