Hydraulic Cylinders.

Leading Supplier of Hydraulic Cylinder Parts & Custom Solutions.

Donlouco is a supplier of components to the hydraulic industry, supplying parts to some of the largest hydraulic cylinder manufacturers in Europe.

We have extensive experience in manufacturing hydraulic components from our Jiashan facilities, including highly complex CNC machined parts with integrated valve ports etc.

Quality Control

Donlouco is fully ISO 9001 and EN 1090 approved for CE Marking. All staff trained to European/US standards.

Manufacturing to Exact Customer Requirements

All Hydraulic Cylinder Components are manufactured to the highest possible standards and to exact customer specifications. These include:

• Simple Threaded Weld Ports.

• Machined Pistons.

• Forged Rod Ends.

• Threaded Gland Nuts and Flanges.

• Forged Rod Ends and Cylinder Bases.

Seamless Manufacturing For Hydraulics.

efficient hydraulic component production

Donlouco delivers seamless, end-to-end manufacturing for hydraulic components, leveraging integrated supply chain management and advanced CNC technology to ensure maximum efficiency and reliability for every order.

Price-Quality Combination

• Donlouco offers the best price/quality combination for hydraulic components globally.

Critical Quality and Performance

• We prioritise quality and performance to ensure long-term sustainability of our supply chain.

Flexible Manufacturing Options

• Benefit from highly flexible manufacturing options designed to increase capacity with minimal investment.

Reduced Overhead Costs

• Achieve significant reductions in overhead costs associated with expanding capacity.

Manufacturing Solutions.

Cost-effective hydraulic parts

Donlouco sets the global standard for cost-effective hydraulic parts, combining competitive pricing with ISO 9001-certified quality to deliver unmatched value for OEMs and industrial clients.

Improved Performance

• Enhanced performance resulting in long-term, reliable revenue growth.

"Plug N Play" Delivery

• Parts are delivered ready to be seamlessly integrated into the manufacturing environment.

Expert Management

• Donlouco’s engineers, quality control, and supply chain experts are in Ireland and the Far East.

Streamlined Service

• Streamlined service, allowing customers more time and resources to focus on core value-added activities.

Enhanced Customer Experience

• Improved end-customer experiences and increased sales revenue in the competitive global hydraulics market.

Leading Manufacturer and Supplier.

critical quality control

We prioritise critical quality and high-performance standards, utilising rigorous quality control and comprehensive testing to guarantee sustainable supply chains and long-lasting hydraulic solutions.

Experienced Manufacturing Partner

• For over 15 years, Donlouco has been a critical supplier of parts to hydraulic cylinder manufacturers. We have become a leading supplier of CNC-machined and forged steel parts to this industry and continue to grow with new and existing customers.

Dedicated Hydraulics Division.

High-Quality Forged & CNC Machined Hydraulic Cylinder Parts

Donlouco is the preferred choice for companies seeking high-quality hydraulic cylinder parts due to our unique capabilities and extensive network. Our CNC Machining Facility in Jiashan, China combined with an approved network of subcontractors for forgings and special processes, ensures the manufacture of parts to the highest standards.

Our unique ability allows us to communicate exact customer requirements far beyond what can be written on drawings and specifications all managed seamlessly from our head office here in Ireland to our experienced team of Engineers and Managers in the Far East.

Manufacturing Partner for the Hydraulics Industry.

Precision CNC Machining for Hydraulic Components.

Donlouco specialises in precision CNC machining for hydraulic cylinder parts, offering extensive experience across a wide range of steels—including carbon steel, stainless steel, and speciality alloys. Our advanced 3, 4, and 5-axis CNC machining centres enable us to manufacture both large and small hydraulic components with complex geometries, tight tolerances (down to ±0.005mm), and superior surface finishes (Ra < 0.8μm).

We machine critical features such as valve ports and custom interfaces to meet industry standards, including SAE, T2A, JIC, Sun, and Atlantic.

Donlouco delivers consistent quality and dimensional accuracy for all hydraulic components.

Forging for Hydraulic Cylinder Parts.

Donlouco provides expert forging services for hydraulic components such as cylinder bases, flanged parts, and rod eyes. Our forging process produces hydraulic cylinder parts with superior strength and durability compared to cast or machined from solid. By optimising grain flow and material density, our forged components achieve excellent mechanical properties, critical for demanding hydraulic applications.

With forging capacities up to 1,600 tons (Die), Donlouco manufactures a broad range of part sizes and custom designs. Secondary precision CNC machining and heat treatment as required, ensuring optimal performance and longevity in service.

Extensive Experience In The Forging Of Hydraulic Components.

Forging Capabilities and Quality Assurance

• Versatile Forging Capacity: Forging capability from small, detailed parts to large forgings of 50 kg or more.

• Finished Part Production: Maximum forging capacity of 1600 Ton. Forged parts, mostly CNC machined to a finished part level.

• Tool Design and Management: Forging tools are designed and managed and can be reverse-engineered from finished part drawings by Donlouco.

• Steel Grades Compliance: All steel grades to meet customer requirements and European standards. Suitable steel grades are used for welded parts to ensure welding integrity is always achieved. 

• Comprehensive Testing: Forged parts can be fully tested, tensile, impact, etc. at the approval stage and by sampling as required.

• Rigorous Quality Control: All parts are fully checked and inspected before shipping with full traceability and reports available for all shipments.