Custom machinery parts · Shanghai, China · Drawing-led projects
Manufacturing & inspection planningContact our teambecky@Golf-dkl.com+86 19921064366
Factory Tour

Your Parts, Made Right — Through a Network We Manage

Top-One Union is a trading and sourcing partner with the flexibility of many factories and the accountability of one. See how we run your supply chain — and how you can verify it.

One Partner, a Whole Supply Chain

Most buyers who need CNC parts, forgings, castings, plastic parts and hydraulic cylinders end up juggling five suppliers, five sets of quality standards and five points of contact. We consolidate that into one.

Multi-category coverage

CNC machining, forging, casting, injection moulding, hydraulic cylinders and wear parts — sourced, quoted and delivered through a single account.

Supplier matching

Every order is routed to the workshop best suited to its material, size, tolerance and volume — not to whoever happens to be available.

Single point of contact

One team handles engineering review, production follow-up, inspection and shipping. You never chase a factory directly.

Sourcing coordinator reviewing a technical drawing with a machined metal sample
One team reviews drawings, routes production and follows up — you never chase a factory directly.

Vetted Factories, on Your Side

We work with a managed network of partner workshops. Each one is assessed and graded before it ever sees your drawing.

Vetting stepWhat we check
Qualification reviewBusiness licence, export experience, material and process certificates relevant to the category
On-site assessmentEquipment condition, capacity, workforce, quality documents and housekeeping
Trial orderSample submission, first-article inspection and dimensional report before any volume commitment
Ongoing gradingDelivery on-time rate, defect rate and responsiveness — reviewed and re-graded periodically
We do not publish partner factory names or equipment lists publicly. For a specific order, we will confirm the assigned production site, its equipment and its certificates in writing before you commit.

Quality We Own, Not Outsource

We hold the quality of every order, regardless of which workshop machines it. That means defined checkpoints from drawing to dispatch.

  • Drawing and material review — specification, tolerance and standard agreed before production
  • First-article inspection — a dimensional report before the batch runs
  • In-process checks — sampling at key stages, not just at the end
  • Final inspection and documentation — dimensional, material and test certificates (e.g. EN 10204 3.1) as required
  • Third-party verification — SGS, BV or TÜV inspection arranged on request for UT, MT, spectro or tensile testing
Quality engineer measuring a machined part with a digital caliper
Defined checkpoints at every handoff, with third-party verification on request.
Inspection reports and material certificates organised on a desk
Every claim backed by records — certificates, reports and re-graded supplier performance.

Three Ways to Check Us Out

  • Live video audit — a call focused on the processes and equipment assigned to your project
  • Third-party inspection — we coordinate with your nominated inspector on site, scope and schedule
  • Visit the production site — we arrange the appointment, address and travel details for the workshop making your parts

Ready to get a quote?

Send us your drawing, quantity, material and target lead time. We will match the right workshop and confirm the quotation scope and schedule for your project.

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