Kawasaki Staffa 270 Marine Hydraulic Motor – HMB270 / HMC270 High-Torque Radial Piston Motor
Staffa 270 is a large high-torque, low-speed radial piston hydraulic motor size in the Kawasaki Staffa hydraulic motor family.
The photograph supplied by SM MARINE SERVICE™ shows a large Staffa-type radial piston hydraulic motor prepared inside a wooden shipping case. However, the complete model nameplate is not visible in this photograph, so the exact suffix and configuration cannot be confirmed from the image alone.
For this reason, a buyer should verify the complete nameplate before ordering. The commonly encountered Staffa 270 families include:
STAFFA HMB270 – Fixed Displacement Hydraulic Motor
STAFFA HMHDB270 – Heavy-Duty Fixed Displacement Version
STAFFA HMC270 – Dual Displacement Hydraulic Motor
Kawasaki documentation confirms that the HMB270 is part of its Staffa high-torque, low-speed radial piston motor range, while HMC270 is a dual-displacement Staffa motor.
Product Information
Manufacturer: Kawasaki Precision Machinery / Kawasaki
Brand / Product Family: Staffa
Country / Brand Origin: Japan / Kawasaki hydraulic product family
Size: 270
Common Models: HMB270, HMHDB270, HMC270
Product Type: High-Torque Low-Speed Radial Piston Hydraulic Motor
HMB270 Type: Fixed Displacement
HMC270 Type: Dual Displacement
Primary Marine Application: Winches, windlasses, mooring machinery and heavy-duty deck machinery
Product Introduction
Staffa motors are well known in marine and heavy industrial hydraulic applications where machinery requires extremely high starting torque and controlled low-speed rotation.
The Staffa 270 size is particularly relevant to heavy deck machinery because it can deliver high torque directly at relatively low rotational speeds.
This makes Staffa motors suitable for applications where the hydraulic drive must start a heavily loaded drum, windlass or other rotating machinery smoothly.
Kawasaki describes the Staffa HMB range as fixed-displacement, high-torque, low-speed radial piston motors intended for rigorous industrial and mobile applications.
What Is a Staffa 270 Hydraulic Motor?
A Staffa 270 is a radial piston hydraulic motor.
Instead of converting electrical energy directly into rotation like an electric motor, it converts hydraulic pressure and oil flow into mechanical shaft torque and rotation.
The simplified operating sequence is:
Hydraulic Pump → Pressurized Oil → Staffa Radial Pistons → Cam Mechanism → Output Shaft → Winch / Windlass / Deck Machinery
The radial piston arrangement provides excellent torque characteristics, making this type of motor particularly suitable for heavily loaded marine machinery.
HMB270 – Fixed Displacement Staffa Motor
The Kawasaki Staffa HMB270 is a fixed-displacement radial piston hydraulic motor.
Official Kawasaki product-line information gives the HMB270 displacement as approximately:
263 in³/rev / 4310 cm³/rev
with a maximum listed speed of approximately:
125 rpm
and rated/max pressure values of approximately:
250 bar rated
293 bar maximum
The same Kawasaki catalog lists rated torque of approximately 15,941 Nm for HMB270.
A more detailed HM(HD)B270 technical document describes the motor as a high-torque, low-speed radial piston design incorporating hydrostatic balancing for efficiency, good breakout torque and smooth operation.
HMC270 – Dual Displacement Staffa Motor
The Staffa HMC270 differs from the HMB270 because it is a dual-displacement hydraulic motor.
Kawasaki documentation specifically identifies:
HMC 270 – Staffa Dual Displacement Hydraulic Motor.
This type of arrangement can be particularly valuable in marine deck machinery where the operating requirement may alternate between:
High Torque / Lower Speed
and
Lower Torque / Higher Speed
depending on the hydraulic circuit and selected displacement.
This flexibility is one reason Staffa HMC motors are encountered in winches and other demanding hydraulic drive systems.
Main Features
Typical Staffa 270-family characteristics include:
• High-torque radial piston design
• Excellent low-speed operation
• Strong starting / breakout torque
• Heavy-duty construction
• Hydrostatic balancing
• Fixed-displacement options in HMB family
• Dual-displacement options in HMC family
• Heavy-duty bearing options on applicable models
• Reversible operation depending on configuration
• High-pressure hydraulic operation
• Suitable for severe marine duty
• Serviceable internal components
• Long-established Staffa hydraulic motor technology
Kawasaki-related technical documentation also lists marine-specification primer paint and several shaft-seal, cavitation-resistance and heavy-duty options across the Staffa HMB range.
Main Technical Specifications – HMB270
For the HMB270 fixed-displacement model, Kawasaki documentation identifies approximately:
Motor Type: Radial Piston Hydraulic Motor
Displacement: 4310 cm³/rev
Displacement: 263 in³/rev
Rated Pressure: 250 bar
Maximum Pressure: approximately 293 bar
Maximum Speed: 125 rpm
Rated Torque: approximately 15,941 Nm
Approximate Weight: 420 kg
Specifications depend on exact model code, shaft, bearing and optional configuration. The complete motor code should therefore be verified before ordering replacement equipment.
Main Components
A Staffa radial piston hydraulic motor generally incorporates major assemblies such as:
• Motor Housing / Casing
• Radial Piston Assemblies
• Cam / Cam Ring System
• Cylinder / Piston Arrangement
• Distributor / Valve Arrangement
• Output Shaft
• Shaft Bearings
• Shaft Seal
• Main Hydraulic Ports
• Case Drain Connection
• Seals and O-Rings
• Mounting Flange
• Covers and Fasteners
The exact internal component configuration and part numbers depend on the complete Staffa model code.
Marine Applications
The Staffa 270 family is particularly relevant to heavy marine hydraulic machinery.
Common applications include:
Mooring Winches
High starting torque is valuable when handling loaded mooring lines.
Anchor Windlass Systems
Large radial piston motors can provide the torque required to operate heavy anchor-handling machinery.
Anchor Winches
Staffa motors are found in hydraulic anchor-handling and deck machinery systems.
Deck Machinery
Typical applications can include heavy rotating deck machinery requiring high torque at low speed.
Offshore Equipment
Radial piston motors can also be used in demanding offshore hydraulic machinery.
Industry references document HMC270 motors in marine deck-machinery applications, including Pusnes-associated equipment.
Staffa 270 in Pusnes / Marine Deck Machinery
For marine buyers, another important search combination is:
STAFFA + PUSNES
Staffa hydraulic motors are encountered on various Pusnes / Nippon Pusnes deck-machinery installations.
Industry service references document HMC270 configurations used in deck machinery and show other Staffa motors associated with windlass and mooring-winches.
Therefore, when requesting a replacement for existing Pusnes machinery, buyers should provide:
Vessel Name
Deck Machinery Maker
Winch / Windlass Model
STAFFA Motor Model
Complete Motor Code
Serial Number
Shaft Type
Mounting Details
Hydraulic Port Arrangement
Common Problems & Troubleshooting
Hydraulic Motor Does Not Rotate
Possible causes include:
• Insufficient hydraulic pressure
• Insufficient oil flow
• Directional/control valve fault
• Blocked hydraulic line
• Internal mechanical damage
• Distributor/valve problem
• Excessive load
• Internal seizure
Before dismantling the motor, hydraulic supply pressure and flow should be verified.
Low Torque
Possible causes include:
• Low system pressure
• Internal leakage
• Worn piston components
• Distributor wear
• Hydraulic pump deterioration
• Incorrect displacement selection on applicable HMC motors
• Excessive external mechanical load
External Oil Leakage
Inspect:
• Shaft seal
• Housing seals
• O-rings
• Covers
• Port connections
• Case drain line
Seal deterioration should not automatically be treated as an isolated problem; excessive case pressure can also contribute to seal failure.
Excessive Case Drain Leakage
Increasing internal leakage can indicate internal wear.
Check:
• Pistons
• Cylinder surfaces
• Distributor components
• Internal sealing surfaces
• Hydraulic oil condition
Shaft Seal Failure
The shaft seal can be affected by wear, contamination or excessive casing pressure.
Technical documentation for HM(HD)B270 states that with a standard shaft seal, motor casing pressure should not exceed the specified limitation in the applicable manual.
Abnormal Noise or Vibration
Possible causes include:
• Cavitation
• Air entering hydraulic circuit
• Bearing wear
• Mechanical damage
• Insufficient inlet pressure
• Contaminated hydraulic oil
• Incorrect alignment
• Excessive mechanical load
Motor Overheating
Investigate:
• Excessive internal leakage
• Incorrect oil viscosity
• Insufficient cooling
• Continuous operation outside rating
• Hydraulic restriction
• Excessive back pressure
• System contamination
Maintenance Tips
Regular preventive maintenance can significantly extend Staffa hydraulic motor service life.
Recommended checks include:
• Inspect hydraulic oil condition
• Maintain proper filtration
• Check for water contamination
• Monitor case drain leakage
• Inspect shaft seal leakage
• Check hydraulic hoses and connections
• Monitor abnormal noise and vibration
• Check operating pressure
• Verify motor temperature
• Inspect mounting bolts
• Check shaft and coupling alignment
• Follow the applicable Kawasaki service documentation
Clean hydraulic oil is particularly important because contamination can accelerate wear of precision hydraulic surfaces.
Spare Parts & Replacement Availability
SM MARINE SERVICE™ can support sourcing of Staffa hydraulic motors and associated components depending on exact model and availability.
Typical requirements can include:
• Complete Staffa 270 Hydraulic Motor
• HMB270 Complete Motor
• HMHDB270 Complete Motor
• HMC270 Complete Motor
• Output Shaft
• Shaft Seal
• Seal Kit
• O-Ring Kit
• Bearings
• Piston Components
• Distributor Components
• Internal Hydraulic Components
• Housing / Covers
• Repair / Overhaul Components
• Replacement Motor
Available conditions may include:
New • Used • Tested Working • Refurbished • Reconditioned
For replacement inquiries, send the complete motor nameplate and photographs because “Staffa 270” alone does not identify the exact displacement/control/shaft/mounting configuration.
Why Ships Still Use Staffa Hydraulic Motors
Staffa motors remain relevant on existing ships and industrial machinery because the fundamental radial piston design is well suited to demanding high-torque applications.
For shipowners, replacing an existing Staffa motor with the correct matching unit can also avoid expensive modification of:
• Hydraulic piping
• Mounting foundation
• Shaft coupling
• Winch gearbox
• Control valves
• Hydraulic power unit
• Existing deck machinery
This makes sourcing the correct replacement or professionally reconditioned Staffa motor economically attractive for older vessels.
Frequently Asked Questions – FAQ
What is a Staffa 270?
Staffa 270 refers to the 270-size family of high-torque radial piston hydraulic motors. Exact models include variants such as HMB270 and HMC270.
Who manufactures Staffa hydraulic motors?
Staffa hydraulic motors are part of the Kawasaki hydraulic product family. Kawasaki technical literature identifies the Staffa HMB and HMC ranges.
What is Staffa HMB270?
HMB270 is a fixed-displacement high-torque, low-speed radial piston hydraulic motor with approximately 4310 cm³/rev displacement in Kawasaki documentation.
What is Staffa HMC270?
HMC270 is a dual-displacement Staffa radial piston hydraulic motor.
Are HMB270 and HMC270 the same?
No. They belong to the Staffa family but have different operating/configuration characteristics. HMB is a fixed-displacement family, while HMC is a dual-displacement family.
Where is Staffa 270 used on ships?
Common marine applications include mooring winches, anchor winches, windlasses and heavy deck machinery.
Can I replace a Staffa HMB270 with another Staffa 270?
Compatibility must be verified. The complete model code, displacement, shaft, mounting arrangement, rotation, hydraulic ports and other configuration details should be compared.
Are Staffa 270 spare parts available?
Availability varies by configuration, but complete motors, seals, bearings and internal service components may be sourced depending on the exact model.
Can I buy a used or refurbished Staffa 270?
Yes. SM MARINE SERVICE™ can support sourcing of used, tested, refurbished and reconditioned Staffa hydraulic motors, subject to availability.
What are common Staffa hydraulic motor faults?
Typical problems include hydraulic leakage, shaft-seal leakage, excessive case drain, low torque, slow/no rotation, abnormal noise, overheating and internal wear.
Where can I buy a Kawasaki Staffa HMB270 or HMC270?
SM MARINE SERVICE™ supports international sourcing and supply of Staffa marine hydraulic motors and related hydraulic spare parts.
Can SM MARINE SERVICE™ supply Staffa motors worldwide?
Yes. SM MARINE SERVICE™ supports marine customers internationally with equipment sourcing and worldwide shipping.
Short Product Description
Kawasaki Staffa 270 is a heavy-duty high-torque, low-speed radial piston hydraulic motor family used in marine winches, anchor windlasses, mooring systems and other demanding deck machinery. Common variants include the Staffa HMB270 fixed-displacement motor, HMHDB270 heavy-duty version and HMC270 dual-displacement motor. SM MARINE SERVICE™ supports worldwide sourcing of complete Staffa motors, replacement units and spare parts in new, used, tested, refurbished and reconditioned condition, subject to availability.
User Manual & Technical Resources
???? Kawasaki Staffa HMC270 Technical Data / Manual
Download PDF – Kawasaki Staffa HMC270
This Kawasaki technical document covers the Staffa HMC270 Dual Displacement Hydraulic Motor.
???? Kawasaki Hydraulic Product Line Catalog
Download PDF – Kawasaki Staffa Product Line Catalog
The catalog includes technical information for the Staffa HMB family, including HMB270.
SM MARINE SERVICE™
Marine Automation & Navigation Equipment Supplier
Available Condition:
• New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment
Stock Location:
• Bangladesh • China
Services:
• Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
Contact Information
SM MARINE SERVICE™ Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com
