Welded Body Hydraulic Cylinders

Welded body hydraulic cylinders have no tie rods. The barrel is welded directly to the end caps; the ports are welded to the barrel; the front rod gland is then usually threaded into or bolted to the cylinder barrel. This allows the piston rod assembly and the rod seals to be removed for service.

 Welded Body Hydraulic Cylinder

Welded body hydraulic cylinders have a number of advantages over tie rod style hydraulic cylinders: Welded cylinders have a narrower body and often a shorter overall length enabling them to fit better into the tight confines of machinery. Welded cylinders do not suffer from failure due to tie rod stretch at high pressures and long strokes. The welded design also lends itself to customization. Special features are easily added to the cylinder body. These may include special ports, custom mounts, valve manifolds, and so on.

The smooth outer body of welded cylinders also enables the design of multi-stage telescopic cylinders.

Welded body hydraulic cylinders dominate the mobile hydraulic equipment market such as construction equipment (including excavators, bulldozers) and material handling equipment (fork lift trucks, telehandlers, and tail lift gates). They are also used in heavy industry such as cranes, oil rigs, and large off road vehicles in above ground mining.

Piston Rod Construction: The piston rod of a hydraulic cylinder operates both inside and outside the barrel, and consequently both in and out of the hydraulic fluid and surrounding atmosphere.

Metallic Coatings: Smooth and hard surfaces are desirable on the outer diameter of the piston rod and slide rings for proper sealing. Corrosion resistance is also advantageous. A chromium layer may often be applied on the outer surfaces of these parts. However, chromium layers may be porous, thereby attracting moisture and eventually causing oxidation. In harsh marine environments, the steel is often treated with both a nickel layer and a chromium layer. Often 40 to 150 micrometer thick layers are applied. Sometimes solid stainless steel rods are used. High quality stainless steel such as AISI 316 may be used for low stress applications. Other stainless steels such as AISI 431 may also be used where there are higher stresses, but lower corrosion concerns.

Ceramic Coatings: Due to shortcomings of metallic materials, ceramic coatings were developed. 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 do not suffer from high brittleness.

Lengths: Piston rods are generally available in lengths which are cut to suit the application. As the common rods have a soft or mild steel core, their ends can be welded or machined for a screw thread.

hydraulic cylinders

Hydraulics CatalogueOur catalogue also shows a selection of the standard hydraulic cylinders / hydraulic rams that we regularly supply, including welded hydraulic cylinders – but if you are looking for a bespoke design then we can take care of that too! Just complete our Bespoke Cylinder Design Form and one of our hydraulic engineers will get back to you, or simply call them to discuss you requirements in detail.

And finally… as an ISO 9001 accredited company, we firmly believe that there are no better advocates than our customers. So if you need a little more convincing before you decide to give us a try, then here are a few case studies and testimonials for you to browse:

Hydraulic Cylinders

Whether you're looking for a single or double-acting, tie-rod, marine, subsea or welded hydraulic cylinder, something standard or made-to-order, we have it covered... Better still, you can relax knowing that you're dealing with... Find out more...

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... Find out more...

Hydraulic Systems

Hydraulic systems can be found everywhere, from: food production lines and material handling to credit card manufacturing, waste management and recycling, transport and logistics, and those fairground rides that you love - or hate - the list goes on and... Find out more...

Hydraulic Cylinders

Looking for a bespoke hydraulic cylinder design service? Look no further... So you may well have read about the service we provide for hydraulic systems... Find out more...

System Hydraulics

Whether you’re starting with a blank sheet of paper or you are trying to improve an existing hydraulic system design, we understand that you’ll need performance efficiency and... Find out more...

Hydraulic power pack

Your one-stop hydraulic resource... Thanks to our seemingly unrivalled access to a vast range of hydraulic manufacturers from around the world, and our innovative approach to hydraulic problem solving, Hydraulics Online are THE... Find out more...

Yacht

"... I searched for ages to find the right size hydraulic cylinder and you guys came up trumps. Excellent service and Jordan was really helpful." Click through on the following links if you’d like to find out more  Find out more...

Refuse and Waste Mangement Services

The Customer: International Refuse and Waste Management Services Company The Task: Hydraulics Online received a very basic email enquiry from this new international customer requiring a 3-stage... Find out more...

Power Transmission Equipment

The Customer: Power Transmission Equipment Manufacturer and Wholesaler The Task: To provide a complete hydraulic... Find out more...

Marine Cylinder

The Customer: Management, Engineering and Procurement Services Company to Offshore, Sub-sea and Oil and Gas Industries The Task: Hydraulics Online were contacted to provide pricing and a detailed... Find out more...

Concrete Block Manufacturing

The Customer: Leading Manufacturer of Concrete Products The Task: Hydraulics Online were asked to design a complete... Find out more...

http://www.hydraulicsonline.com/testimonial-horsebox-manufacturer

Hydraulic power pack and cylinder have arrived this morning; they're now fitted and all is working perfectly. Thanks for your help... We will certainly be using you again. Click through on the... Find out more...

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

Blog & Case Studies

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Testimonials

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