BMSY Series Hydraulic Motor
Products: Orbital Hydraulic Motors
The BMSY series of cycloidal hydraulic motors are advanced hydraulic motors featuring a face-port distribution design. This series employs a column-type rotor-stator assembly and is characterized by high operating pressure, high efficiency, excellent overall efficiency retention, and a long service life. Based on the standard design, multifunctional variants can be customized to meet specific user requirements.
Description:
BMSY hydraulic motors are designed for medium- to heavy-duty mobile machinery requiring high torque, efficient operation and flexible configurations. With nominal displacements from 80 to 500 cm³/rev., continuous working pressure differences up to 21 MPa and continuous torque up to 950 N·m, the series provides a reliable drive solution for mobile and industrial hydraulic systems.
Key Specifications
- Nominal displacement range: 80–500 cm³/rev.
- Actual displacement range: 81.8–497 cm³/rev.
- Max. continuous working pressure difference: up to 21 MPa.
- Max. continuous torque: up to 950 N·m.
- Max. continuous flow: up to 75 L/min.
- Max. inlet pressure: 25 MPa continuous / 30 MPa intermittent.
- Multiple flange, shaft, port and rotation options available.
BMSY Series Technical Data
Compare model-specific displacement, speed, torque, working pressure difference and flow ratings for preliminary selection.
BMSY 80–160
BMSY-80
• Actual Displacement: 81.8 cm³/rev.
• Max. Speed: 780 / 970 rpm
• Max. Torque: 228 / 309 N·m
• Max. Working Pressure Difference: 20.5 / 27.5 MPa
• Max. Flow: 65 / 80 L/min
Continuous / Intermittent values.
BMSY-100
• Actual Displacement: 100 cm³/rev.
• Max. Speed: 735 / 895 rpm
• Max. Torque: 288 / 387 N·m
• Max. Working Pressure Difference: 20.5 / 27.5 MPa
• Max. Flow: 75 / 90 L/min
Continuous / Intermittent values.
BMSY-125
• Actual Displacement: 121.2 cm³/rev.
• Max. Speed: 606 / 735 rpm
• Max. Torque: 350 / 465 N·m
• Max. Working Pressure Difference: 20.5 / 27.5 MPa
• Max. Flow: 75 / 90 L/min
Continuous / Intermittent values.
BMSY-160
• Actual Displacement: 158.8 cm³/rev.
• Max. Speed: 460 / 560 rpm
• Max. Torque: 490 / 600 N·m
• Max. Working Pressure Difference: 21 / 26 MPa
• Max. Flow: 75 / 90 L/min
Continuous / Intermittent values.
BMSY 200–500
BMSY-200
• Actual Displacement: 200 cm³/rev.
• Max. Speed: 365 / 445 rpm
• Max. Torque: 600 / 725 N·m
• Max. Working Pressure Difference: 21 / 25 MPa
• Max. Flow: 75 / 90 L/min
Continuous / Intermittent values.
BMSY-250
• Actual Displacement: 254.5 cm³/rev.
• Max. Speed: 285 / 350 rpm
• Max. Torque: 720 / 900 N·m
• Max. Working Pressure Difference: 20 / 25 MPa
• Max. Flow: 75 / 90 L/min
Continuous / Intermittent values.
BMSY-315
• Actual Displacement: 321.2 cm³/rev.
• Max. Speed: 225 / 277 rpm
• Max. Torque: 905 / 1,030 N·m
• Max. Working Pressure Difference: 20 / 24 MPa
• Max. Flow: 75 / 90 L/min
Continuous / Intermittent values.
BMSY-400
• Actual Displacement: 400 cm³/rev.
• Max. Speed: 180 / 220 rpm
• Max. Torque: 890 / 990 N·m
• Max. Working Pressure Difference: 16 / 19 MPa
• Max. Flow: 75 / 90 L/min
Continuous / Intermittent values.
BMSY-500
• Actual Displacement: 497 cm³/rev.
• Max. Speed: 145 / 180 rpm
• Max. Torque: 950 / 1,030 N·m
• Max. Working Pressure Difference: 14 / 15 MPa
• Max. Flow: 75 / 90 L/min
Continuous / Intermittent values.
Max. Inlet Pressure
21 MPa rated / 25 MPa continuous / 30 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, shaft seal pressure, axial and radial load information, installation dimensions and ordering information.
Available Configurations
Multiple mounting, shaft, port, rotation and finish options are available for different equipment and hydraulic system requirements.
Structures & Mounting
• Standard BMSY configuration
• 2-bolt and 4-bolt diamond flange options
• 4-bolt square flange options
• 6-bolt diamond flange options
• Wheel flange and large-pilot options
Shaft Options
• Straight keyed shafts
• Involute spline shafts
• Straight-sided spline shafts
• Woodruff-key shaft options
• Metric and imperial shaft sizes
Port Options
• G thread options
• Metric thread options
• UNF O-ring ports
• NPT ports
• Multiple drain-port configurations
Rotation & Special Options
• Standard rotation
• Reverse rotation
• Unpainted, blue, black or silver-gray finish
• Standard and customized configurations
Available configurations vary by displacement and installation type. Please provide the existing model, nameplate, mounting flange, shaft dimensions, port threads, drain-port requirements and application information for final confirmation.
Designed for efficient medium-heavy duty use
Efficient Medium-duty Drive
Supports reliable torque output for medium-heavy mobile hydraulic transmission.
Configurable Displacement Range
The 80–500 cm³/rev range helps match different speed and torque requirements.
Reliable Low-speed Operation
Designed for smooth running in low-speed high-torque hydraulic drive systems.
Mobile Machinery Integration
Suitable for agricultural, construction and industrial equipment drive circuits.
Applications
Harvesting equipment
Tractors & attachments
Precision Farming Solutions
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