Radial Piston Motors

Hydraulics Online has widespread, competitive access to both leading and niche radial piston motor manufacturers from around the world…

And as one customer said, our independence, when combined with our extensive technical experience, means that we’re “not just a sales extension of a bigger company but an integrated hydraulics supplier”. That means that when looking for radial piston motors, or any other hydraulic products and equipment for that matter, you can be certain that you will get the very best advice and solution – your brand will be in safe hands!

We can supply you with radial piston motors from manufacturers including: Italgroup, Bosch Rexroth, KYB Hydrostar, Staffa, SAI, Calzoni, Denison, Dusterloh and Dinamic Oil.

Italgroup Staffa Parker-Hydraulics Calzoni SAI


Why Radial piston motors?

Well, they are very efficient and generally have a long life, although the high degree of precision required in the manufacture of radial piston motors can raise initial costs. They provide high torque at relatively low shaft speeds and excellent low speed operation with high efficiency, but do have limited high speed capabilities. Because of the low output speed, in many cases a gearbox is not necessary.

Radial piston motors are therefore primarily applied where high torques are required at a low speed, for example: winch drives, concrete mixers, trawlers and plastic injection moulding machines.

Italgroup Radial Piston Motors - Plastic Injection Moulding

Radial piston motor designs

  • Crankshaft type – with a single cam and pistons pushing inwards. This type of hydraulic motor has extremely high starting torque characteristics. They are available in displacements from 40cc/rev through to about 12 litres/rev but can sometimes be limited in power output. Crankshaft type radial piston motors are capable of running at “creep” speeds and some can run seamlessly up to 1500 rpm whilst offering virtually constant output torque characteristics. Despite essentially being an old design, this makes them the most versatile type of hydraulic motor.
  • Multilobe cam ring type – with a cam ring which has multiple lobes and piston rollers that push outwardly against the cam ring. This produces a very smooth output with high starting torque but they are often limited in the upper speed range. This type of motor is available in a very wide range from about 1 litre/rev to 250 litres/rev. These motors are particularly good on low speed applications and can develop very high power.

Beyond this, specific types of radial piston motor include: compact radial piston motors, dual displacement radial piston motors, fixed displacement radial piston motors, low speed high torque radial piston motors, two speed radial piston motors and variable displacement radial piston motors.

Hydraulics CatalogueVisit our catalogue to see a small selection of the hydraulic motors and components we have on offer. It is just a sample though – we can’t possibly detail everything that we do. So if you can’t find what you’re looking for then call us or complete our Stock Enquiry Form.


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Suppliers of high quality Sauer Danfoss OMT Motors... It’s great to know that this new customer, a golf club and centre, thought our service was “above par” and they were happy to “tee off” their relationship with... Find out more...

Now and again, the team receive requests that are a little bit different – you might say they’re ‘blooming marvellous’! A new customer, who produces a range of lavender toiletries and gifts, contacted the technical team... Find out more...

A returning customer, who provides on-site servicing and troubleshooting to industries such as oil, marine and plant hire required a Casappa and a Linde hydraulic motor in kit form – other products were required as well as the motor. The motor was to be used as... Find out more...

At Hydraulics Online, we're passionate about all things hydraulic, and simply love the diversity of our customer base and the vast range of applications that we're involved with every day. Nothing ever fazes the technical team, who relish the challenges thrown at... Find out more...

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Trying to find the right hydraulic equipment at the right price and lead time can be a challenge at the best of times, but when what you are looking for is no longer even manufactured it can seem impossible. However, it’s not usually a problem for the team here at... Find out more...

I just wanted to thank you for the speed and efficiency with which you dealt with my order for a hydraulic motor - I've told all the other fishermen in the area where to go to get their hydraulic parts in future!  Find out more...

I recently contacted your company to get a hydraulic motor identified and ordered. Your employee, Jordan, was excellent with the information I gave him. He quickly identified the motor manufacturer and model, which was in stock, and supplied it to us... Find out more...

I'd just like to thank you and your team for the great service that you gave me last week. When the manufacturer told me they had 350 of the motors that I needed on back order I didn't hold out much hope. Hydraulics Online however came to mine and Great Yarmouth's rescue. We had a... Find out more...

Call us now on: +44 (0)845 644 3640 or enquire online and "let us take the pressure!"

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SpaceX Hyperloop Competition

HypED is a University of Edinburgh student-led project that is blazing a successful path for British engineers in Elon Musk’s Hyperloop project – and demonstrating […]

A Personal Story – Helen, Co-Founder of Hydraulics Online

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