Marine Mechanical Hydraulic Five-Star Motor HMC125/S/125/40/FM3/CS
Kawasaki Staffa HMC125 Series Marine Radial Piston Hydraulic Motor
Overview
This is a two-displacement radial piston hydraulic motor, also known as five-star motor, featuring low speed and high torque. It is specially designed for marine applications.
1. Model Code Explanation (HMC125/S/125/40/FM3/CS)
- HMC125: Series and frame size, maximum displacement
- S: Shaft type – Spline shaft
- 125: Rated working pressure: 125 bar
- 40: Rated speed: 40 rpm
- FM3: Valve configuration – Staggered side ports with metric threads
- CS: Mounting & control type – Lug mounting with variable displacement control valve
2. Main Technical Specifications (Custom 125 bar Version)
- Construction: Radial piston design, two-displacement structure, low speed & high torque
- Displacement: 100% displacement = 2048 cm³/rev; 50% displacement = 983 cm³/rev
- Pressure: Rated pressure 125 bar; Peak pressure 150 bar
- Speed: Rated speed 40 rpm; Max. speed 190 rpm (600 rpm at 50% displacement)
- Output torque: Approx. 7472 Nm at 125 bar (100% displacement)
- Weight: Approx. 234 kg
- Housing & seal: High-strength cast iron housing; FKM fluoroelastomer seals
- Control: Displacement shift available under loaded condition via hydraulic directional valve
3. Key Design Features
1. Low speed & high torque
Radial pistons act directly on the eccentric cam. It delivers high starting torque and smooth operation.
2. Two-speed displacement shift
100% displacement for heavy load and high torque operation; 50% displacement for light load, higher speed and energy saving. Displacement can be switched under load.
3. Hydrostatic balancing structure
Hydrostatic support for pistons and flow distribution pairs reduces friction, improves overall efficiency and extends service life.
4. Marine reinforced design
Good resistance to salt spray and vibration. Operating temperature range: -20°C ~ +90°C, capable of withstanding thermal shock.
5. Flexible installation
Lug mounting and side staggered ports suit limited installation space on marine decks.
4. Typical Applications
- Marine equipment: Anchor winches, mooring winches, hatch cover drives, deck cranes, steering gears
- Offshore facilities: Platform cranes, anchor handling equipment
- Industrial equipment: Heavy-duty slewing mechanisms, crushers, conveyors
5. Difference from Standard HMC125
- Standard version: Rated pressure 250 bar / 275 bar, max. speed 190 rpm, higher output torque
- Custom version: Low-pressure design of 125 bar, rated speed 40 rpm, applicable for medium and low pressure marine hydraulic systems
Marine Mechanical Hydraulic Five-Star Motor HMC125/S/125/40/FM3/CS - Detailed Information
I. Product Overview
• Model: HMC125/S/125/40/FM3/CS
• Type: Hydraulic Five-Star Motor
• Application: Designed for marine machinery, particularly suitable for hydraulic systems requiring high stability and durability, such as anchor winches, mooring winches, and other heavy-duty equipment.
II. Structural Features
• Five-Star Piston Design: Utilizes a five-star piston configuration for enhanced operational stability and durability, reducing vibration and noise.
• Radial Motor: Ideal for applications with high radial loads, making it well-suited for marine machinery subjected to heavy loads.
• Low-Speed Motor: Capable of delivering high torque at low rotational speeds, meeting specific operational requirements.
III. Technical Specifications
• Operating Pressure: Up to 20 MPa or higher (depending on design), suitable for high-pressure hydraulic systems.
• Output Torque: Up to 15,000 Nm or higher, providing sufficient power for demanding applications.
• Rated Power: Up to 30 kW or higher, based on motor design and operating conditions.
• Rated Speed: Typically ranges from 10 to 250 RPM, adjustable according to customer requirements.
IV. Performance Advantages
• High Stability: The five-star piston design and optimized structure ensure stable operation under various conditions.
• High Durability: Constructed with high-quality materials and advanced manufacturing processes for extended service life.
• Low Noise: Optimized structural design minimizes vibration and noise, improving operator comfort.
• Versatile Configuration Options: Available with multiple output shaft and oil port configurations for easy integration with different hydraulic systems.
V. Application Scenarios
• Marine Anchor Winches: Provides reliable and stable power for anchoring operations, ensuring safety and efficiency.
• Mooring Winches: Used for ship mooring, delivering sufficient torque and stability.
• Other Marine Machinery: Suitable for cargo handling equipment, steering gear, and other hydraulic-powered systems on board.
