High Quality Forgings
with Secondary CNC Machining.

Closed die forging uses shaped dies to press the heated blank into a precise form - ideal for complex, repeatable parts at volume, with tighter tolerances and better surface finish. Open hammer forging is used for larger, heavier parts (50kg+) where the cost of closed dies isn't justified, or where the part geometry is too large for die pressing. Donlouco offers both processes and can advise on the most cost-effective approach for your part.

Yes. Donlouco's CNC machining facility in Jiashan can finish forged blanks to exact customer tolerances using turning, milling, and drilling. Parts are delivered ready for assembly, with no further operations required on your end. This is a core service we provide to hydraulic cylinder manufacturers across Europe.

We work with all standard carbon steels, alloy steels, and stainless steels to European standards. Custom alloys are also available. All raw materials are sourced from approved suppliers and shipped with full mill certificates and material traceability documentation.

Yes. Normalising, annealing, quenching and tempering are all available to customer specifications. Hardness in the range of HRC 20-60 is achievable. Parts can be tested for hardness, impact, and tensile properties at the approval stage and by sampling throughout production.

Yes. Donlouco manages the full process of tooling design and production engineering. For new parts, our engineers can work from customer drawings, 3D models, or physical samples - including reverse engineering where no drawings exist. We produce multi-stage die sets, including pre-form, finish, and trim tools, and manage ongoing tool maintenance throughout production.

Every shipment includes full traceability records covering dimensional inspection and, where applicable, performance test results. Raw material mill certificates are included as standard. Additional test reports for hardness, impact, or tensile testing can be provided where specified at the order stage. Donlouco is ISO 9001 certified and EN 1090 approved.

Forging has a considerable cost advantage over other manufacturing processes, particularly when high volumes are being produced over the longer term. It is the go-to method for manufacturing very tough and strong parts, and it uses less material than machining from solid. Secondary operations such as machining and surface finishing are kept to a minimum, which further contributes to overall cost-effectiveness. For medium to high-volume parts, the tooling investment is typically recovered quickly compared to the per-part savings achieved.