Staffa Radial Piston Motors

In 1916, over 100 years ago, Kawasaki began manufacturing Hele-Shaw type radial piston pumps – only the second ever product in the world designed for use with hydraulic oil.

Now we lead the hydraulics industry in scale and production facilities, manufacturing a wide range of products, from hydraulic pumps, motors, valves, various hydraulic components and electric controllers, to hydraulic systems for mobile, industrial and marine machinery, and many other applications.

More than 60 years ago, in 1957, the first ever hydraulic radial piston motor was designed by George Hally junior, previously a Hercules radial aircraft engine designer, he named it the “Staffa” motor.

Originally designed to work in the harsh environment of a coal mine, the Staffa motor was quickly found to be a tough and reliable product, it soon became popular wherever a reliable direct drive solution was required.

In the decades that have followed, using all the experience gained from working closely with customers in industries including construction, materials handling, marine winches, plastic injection moulding machines and vehicle drives, Kawasaki Precision Machinery engineers have advanced and refined the motor’s design.

Today, modern techniques such as finite element analysis, advanced materials and coatings, computational fluid dynamics and state-of-the-art testing facilities enable us to continue to push the operating boundaries of this unique family of motors.

Over 500,000 motors have now been sold, many of which are still in daily use, after thousands of hours in trouble-free service.

Kawasaki Staffa motors are all made at our advanced and modern manufacturing facility in Plymouth, Devon, United Kingdom, where we continue to invest millions of pounds in the latest production technology. This has enabled us to continually improve our manufacturing processes, maintaining the world leading quality and reliability of Kawasaki Staffa products.

A world-wide network of offices and distributors means that, wherever you are, excellent service and support is available, ensuring hassle-free operation, whatever the application.

HPC Motors

The enhanced variable displacement HPC models include special low friction components, combined with crankcase flushing flow, to achieve increased shaft power. It is used around the world in marine and offshore winch applications and is known for its efficiency and reliability.

> 1,344 to 6,555cc displacements in 6 frame sizes.
> 250 bar continuous pressure rating.
> Dynamic displacement change.
> Freewheel option available.
> Constant horsepower control option.

HMC Motors

The HMC series variable displacement models have two pre-set displacements which can be chosen
from a wide range to suit specific application requirements. These motors are also available in a
continuously variable version using either hydro-mechanical or electro-hydraulic control methods.

> 492 to 5,326cc displacements in 7 frame sizes.
> 250 bar continuous pressure rating.
> Dynamic displacement change.
> Freewheel option available.
> Constant horsepower control option.

HMB Motors

The fixed displacement HMB series radial piston motors have a well proven design that incorporates high efficiency with good breakout torque and smooth running capability.

> 188 to 6,800cc displacements in 12 frame sizes.
> 250 bar continuous pressure rating.
> High volumetric and mechanical efficiency.
> Unique hydrostatic balancing provides minimum wear and extended life.

*NEW* – HMF Motors

The HMF three-speed models have three pre-set displacements which can be chosen from a wide range to suit specific application requirements. Motor displacement can be changed with ease while the motor is running.

> 3 displacement modes
> 1,475 to 5,326 cc displacements in 4 frame sizes.
> Freewheel option available
> Dymanic displacement change
> Speed sensing options