Welded Hydraulic Cylinders

So, we think we know why you’re here… You’re looking for welded hydraulic cylinders, right?

Well, whether you are looking for a relatively “standard”, or completely bespoke welded hydraulic cylinders, you can rest assured knowing that, with over 75 years’ technical experience and our ISO 9001 accreditation under our belt, you’ll be in safe hands. And if you know exactly what you need then that’s great. But if, like the majority of our customers, you need some guidance, then that suits us too.

Whilst tie rod cylinders can be used in a range of applications, welded hydraulic cylinders have more advantageous benefits to a hydraulic system; tending to have a short overall length and a narrow body, welded hydraulic cylinders can sit comfortably in tight spaces within machinery. These cylinders can be easily customised and are also less likely to experience failure, thanks to the tie rod stretch at high pressures and long strokes.

Welded Hydraulic CylindersApplications that use welded hydraulic cylinders typically include construction apparatus (excavators, bulldozers and road grader) and material handling equipment (forklift trucks, telehandlers and lift-gates); cranes, oil rigs and large off-road vehicles are also common examples of other applications.

The standard range of welded hydraulic cylinders (provided by hydraulic companies such as Bosch Rexroth, Hydac and Eaton Vickers) usually offer the following features:

  • Piston Rod Construction: The piston rod of a hydraulic cylinder functions both inside and outside the barrel, therefore also functions both in and out of the hydraulic fluid and surrounding atmosphere;
  • Metallic Coatings: It’s necessary to have smooth and hard surfaces on the external diameter of the piston rod and slide rings for proper sealing. Corrosion resistance is also beneficial – a chromium layer may often be useful on the external surfaces of these parts, though chromium layers may be porous, and could attract moisture and ultimately cause oxidation. In harsh marine circumstances, the steel is therefore frequently treated with both a nickel layer and a chromium layer – often 40 to 150 micrometre thick layers are applied. Solid stainless steel rods are occasionally used: high quality stainless steel such as AISI 316 can be used for low pressure applications while other stainless steels such as AISI 431 can be used where applications have higher stresses, but lower corrosion problems.
  • Ceramic Coatings: Because of the inadequacies of metallic materials, ceramic coatings were advanced. Initially ceramic protection schemes seemed ideal, but porosity was higher than projected. Recently, the corrosion resistant semi ceramic Lunac 2+ coatings were introduced. These hard coatings are non-porous and don’t tend to experience high brittleness.
  • Lengths: Typically, piston rods are available in lengths which are cut to suit the application. As the common rods have a soft or mild steel core, the ends can be welded or machined for a screw thread.

Hydraulic ManufacturersHydraulics Online has widespread, competitive access to quality, welded hydraulic cylinder manufacturers worldwide. The key word is quality. Our ISO 9001 accreditation is your guarantee that we will never compromise on quality, nor make promises that we can’t keep. Aside from obvious routine servicing and maintenance, we want you to be able to “fit and forget” any equipment we supply.

Introducing our standard range of welded hydraulic cylinders…

Hydraulics Catalogue


Visit our catalogue to see some of the hydraulic components we have within our range. If you can’t find what you’re looking for then call us or go to our Contact page to enquire online.



Weleded hydraulic cylindersOur range of welded hydraulic cylinders (pictured) have significant internal bearing lengths reflected in their design, and are constructed with high quality materials together with proven seal types and a choice of sealing systems and materials. Also available is an end of stroke cushioning, for either or both ends of stroke. All of our welded hydraulic cylinders can be supplied with: internal full displacement positional transducers, end of stroke sensors and control valve packages – valves built directly into the cylinder endcap or manifolded onto the cylinder.

Maybe you’re looking for something completely bespoke – welded hydraulic cylinders designed and built so suit your exact requirements…

Whether you simply need a “one-off” or are looking for regular, reliable supplies at volume, we can  provide custom-made welded hydraulic cylinders to suit your specific application, requirements and operating parameters. As long as you know what your end goal is, then we have the hydraulic cylinder design and wider systems expertise to help you achieve it. There’s no minimum order quantity, so if you only need one hydraulic cylinder making that’s fine. Even if your ideas are still on the drawing board our technical team can provide you with an upfront design and outline prices, and then support you through final production and beyond into “business as usual” activities and production.

You can find our bespoke hydraulic cylinder design form here.

To give you a quick example…

Bespoke Welded Hydraulic CylindersA new overseas customer, a prominent product design and manufacturing company within the renewable energy industry, contacted the Hydraulics Online technical team needing assistance with a new product development venture. They had used a tie-rod cylinder within one of their product designs previously and wanted to sample a welded construction hydraulic cylinder instead. The customer ordered 6 of these cylinders which were dispatched next day.

“We placed our first order with you on Thursday of last week. I received a proforma which was paid by us on Friday. The order was delivered direct to our customer by you on Monday… Very good, efficient service!”

I searched for ages to find the right size hydraulic cylinder and you guys came up trumps. Excellent service… really helpful.

In the relatively short time that we have been dealing with Hydraulics Online they have become our first choice hydraulic supplier. Their prices are competitive, deliveries on time and advice given honest and fair. We would not hesitate to recommend Hydraulics Online to anyone needing hydraulic spares or advice in this field.

Can you let the boys know that they are providing us with great service, parts and information in all our locations. Your service is prompt and reliable; you’re our “go to” guys when it comes to hydraulics.

If you’re still not convinced that we’re the right welded hydraulic cylinder supplier for you then there are plenty more examples scattered throughout our library of cases studies and testimonials. We hope to hear from you soon.

Hydraulic Motor

As a trusted hydraulic motor supplier we offer extensive, competitive access to big name, and less well-known, manufacturers from around the world…

That’s because a branded hydraulic motor can often be directly interchanged with those from smaller, niche hydraulic motor manufacturers… meaning that if timescales or budgets are not in your favour, then we can be!

We should perhaps just add that “less well-known” never means inferior quality; we refuse to compromise on that. Our ISO 9001 accreditation, means that we believe that the service and products you receive should be second-to-none, and that includes our hydraulic motor range.

The Hydraulics Online team are passionate about anything and everything hydraulic – but we don’t expect you to be! So if you don’t know what hydraulic motor you are looking for then it doesn’t matter, that’s what we’re here for. Our technical team will work with whatever information you do have, or even a photograph, if you are looking to replace an existing hydraulic motor.

And according to our customers we “know our stuff”:

“Just to let you know how impressed I am with your service. Not only did you recognise the hydraulic motor I needed, where others had failed to, but you were able to despatch a replacement to me incredibly quickly.”

Types of hydraulic motor

We can supply a vast range of motors including: radial piston motorsaxial piston motorsexternal gear motorsGerotor and Geroler motors from manufacturers including: Bosch RexrothDenisonItalgroupMaxmaParkerRoquetSauer DanfossVickers and White Drive Products.

Hydraulic motor manufacturers

So, let’s bring all this to life and showcase a handful of the thousands of customers we’ve helped to date…

Take the case of the owner of an offshore fishing vessel, that was stranded, unable to operate… every lost hour meant more lost revenue. Ouch! The Hydraulics Online team knew that the existing brand of hydraulic motor was on an uncomfortably long lead time, and instead sourced an “off the shelf” equivalent motor which was flown into the UK within 48 hours. No re-engineering was required and the loss to our customer’s revenue was minimised.

Moving on, a power transmission engineering company approached our technical team after one of their blue-chip clients reported a failure on a critical gearbox / hydraulic motor. Our customer had been unable to source a replacement from their existing suppliers within an acceptable lead time; solving the problem and delivering a high level of service to their client was crucial. Our team identified the hydraulic motor immediately and a replacement identical hydraulic motor was purchased and air-freighted within 48 hours again to minimise downtime for the end customer.

A third customer, a national household power generation company, needed a replacement hydraulic motor following the failure of the main hydraulic starter (radial piston) motor on a LM6000 GT package. The original unit was a Bosch-Rexroth hydraulic motor and was on a long lead time. One of our hydraulic engineers visited the site within an hour of contact, identified the hydraulic motor and specified a suitable equivalent replacement Italgroup hydraulic motor, available from Hydraulics Online stock. This was delivered to site the same day, minimising downtime and getting the company up and running again.

“Hydraulic motor arrived this morning, it’s now fitted and our machinery is working perfectly. Thanks for your help in identifying what we needed… I will certainly recommend your service to all my contacts.”

Hydraulics CatalogueVisit our catalogue to see some of the hydraulic components we have within our range. If you can’t find what you’re looking for then call us or go to our Contact page to enquire online

And if we still haven’t convinced you to give us a try, then maybe reading more of our customer testimonials would do it? Go on, let us take the pressure!

Hydraulic Pump Repair

Searching for a hydraulic pump repair service? Look no further…

Just a quick email to thank you for the hydraulic pump repair. My neighbour is really grateful; he said that without the repair the machine would have just been “ferraille” (scrap). Guess I owe you a bottle of red!

When new customers ask what services we can offer, we keep it simple and say: “If it’s hydraulic we can design it, supply it, solve it or repair it…” That means that if you’re looking for a hydraulic pump repair service, then your search is over!

As with other hydraulic equipment, many of our well-repaired and refurbished hydraulic pumps are virtually indistinguishable to a brand new unit. Our service includes a free evaluation – having examined your existing pump to diagnose the extent of work needed, and ability to recover and re-use existing components.

When evaluating your hydraulic pump our team could offer recommendations to improve its design and productivity, so that you could reduce running costs and minimise the likelihood of any future downtime and hydraulic pump repair work. Our assessment may determine that a hydraulic pump repair is not feasible, not good value for money or simply not recommended. If this is the case then we will quote for a new, replacement new unit in addition to quoting for your hydraulic pump repair if appropriate.

Let’s give you a quick example to bring all this hydraulic pump repair talk to life: Our technical team received a phone call from a well-known, global oil company asking whether we could fix one of the pumps (a Parker, Commercial Intertech P15H 6 Section pump) in their system. We asked to see a quick photograph of the defective pump first, before confirming that, yes, we could undertake the repair. The pictures below show the pump, “before” and “after”… Not a bad looking makeover is it?

Hydraulic Pump RepairIf a repair isn’t possible, or not what we would recommend, we may be able to offer a “direct equivalent” to your existing brand of hydraulic pump. This can be a particularly attractive option if you are up against tight timescales or budgets… but rest assured, it doesn’t mean compromising on quality. Ever. As an ISO 9001 accredited company, quality means everything to us. We want you to be able to “fit and forget” any equipment that we supply aside from undertaking routine servicing and maintenance, obviously.

Hydraulic Pump Repair

Take the case of another large offshore oil company, who contacted the team looking for a Commercial Hydraulics P365/P330 tandem pump; they needed one urgently as they were in a breakdown situation on one of their accommodation rigs. The bad news was that the original Commercial Hydraulics pump was on an 18 week lead time, so that simply wasn’t an option for the customer. However, the good news was that we could offer a direct equivalent (pictured) to be supplied from stock… a quality product, constructed and tested in the UK. The customer placed their order instantly. Within 24 hours the pump had been assembled, tested and dispatched… before being flown to the accommodation rig by helicopter the very next day.

At Hydraulics Online we can offer direct equivalents to a vast range of hydraulic manufacturers. We’re always up for a challenge, and even if components are discontinued or seemingly obsolete, we can more often than not source an equivalent suitable to your application.

Some of the popular hydraulic pump manufacturers and brands that we can supply include: Adan, Atos, Bosch Rexroth, Breuninghaus, Bucher, Casappa hydraulic pumps, Commercial, Continental, Dowty hydraulic pump, Dynapower, Eaton, Eaton Vickers, Hamworthy, Hydromatik, Kawasaki, Linde, Parker, Permco, Poclain hydraulic pumps, Racine, RHL, Sauer Danfoss hydraulic pumps, Sauer Sundstrand, Salami hydraulic pumps, Tyrone, Uchida, Vickers and White hydraulic pumps.

We supply a variety of hydraulic pump types including: Gear pumps, rotary vane pumps, fixed displacement pumps / screw pumps, bent axis piston pumps, axial piston pumps, and radial piston pumps. We can help identify the pump that will be appropriate for your application, even if you’re not certain on what type of hydraulic pump you need.

So back to that hydraulic pump repair you were looking for. If you’ve read this far then you’re hopefully tempted to give us a try. So what are you waiting for? We promise you, your brand is in safe hands.

Vickers hydraulic pumps - going like hot cakes!

If you’re not sure on what sort of hydraulic pump you need, our experienced team can help determine the one that will be best suited to your application. We’re always up for a challenge and can usually work miracles with unrecognisable or seemingly obsolete hydraulic pumps too!

It was a ‘Vickers Tuesday’ earlier this week, with 5 Vickers hydraulic pumps shipping to 4 different customers!

A customer who produces, stores and markets agricultural products, required a replacement Vickers 3520V vane pump, whilst a different company needed two Vickers 3525V vane pump to be used on a vessel.

Features of the 3520V and 3525V vane pump include a:

  • Pressure-balanced, modular design to reduce noise, extend life and improve serviceability;
  • Wide range of available displacements to allow a broader range of applications;
  • Reliable and versatile;
  • Used for plastic injection moulding, material handling, power units and other industrial applications.

Another customer required a Vickers PVB 20 LS piston pump for use on a production line facility.

Features of the PVB 20 LS piston pump include a:

  • Compact design to save space in system design;
  • Wide range of displacements (including displacements from 10 to 94cc) to increase flexibility for possible applications;
  • Operating pressures up to 210 bar (3,045 psi).

Finally, a UK customer who is a hydraulic pumps distributor urgently needed a PVH 131.

Features of the PVH series pump include a:

  • Full range of controls and multiple shaft and mounting options to increase flexibility (including torque-limiting capabilities);
  • Durable construction to promote maximum operational reliability.
  • Displacements ranging between 57 to 141cc.
  • Operating pressures up to 250 bar (3,635 psi).

Case Study: Transport Industry

Hydraulics Online were approached by one of the most respected names in the global transport industry and asked to quote for regular supplies of Vickers hydraulic vane pumps. And the rest, as they say, is history.

We love working with original equipment manufacturers, helping them to create a quality product and strengthen their brand. But given that this customer’s vehicles operate throughout the world, we’re rather proud to be “doing our bit” to keep the world moving  too – literally!

Click through on the following links if you’d like to find out more about us and our customers, the markets and hydraulic manufacturers that we deal with and the hydraulic products and services that we can provide.

Remember, if it’s hydraulic we can design it, supply it solve it or repair it!

“Can you let the boys know that they are providing us with great service, parts and information in all our locations. Your service is prompt and reliable; you’re our “go to” guys when it comes to hydraulics.”

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