Buying from Lock Factories in Xiaolan, Zhongshan: What a Buyer Should Check

Updated 2026-11-05 · RAYEN 雷茵

Why do so many lock factories sit in Xiaolan?

A lock is a set of processes. Someone cuts the tool, someone presses or casts the part, someone plates it, and someone assembles it. In Xiaolan those trades sit close together. We have made locks here since 1999, and die casting, plating and heat treatment are all within half an hour of our works.

For a buyer, that closeness has a practical result. Moving a hole does not mean chasing three factories. A change can travel from the tool room to the plater and back in a short drive.

The same closeness has a second result. Because trades sit side by side, a business can offer a finished lock while running only part of the work. There is nothing wrong with that if you know it. The risk is not knowing it. So your first job is to find out who does what.

What should you ask a Xiaolan factory?

• Which steps happen on your own site? Ask for tooling, pressing, assembly and inspection one by one.
• Which steps go to outside suppliers, and who are they? Plating and heat treatment are often specialist trades. Ask where they run and how a change reaches them.
• Who owns the tool for my part? Know this before you pay for tooling.
• Can I see the tool or the line my order runs on? A photograph helps. A visit helps more.
• Can I see the original certificates? Ask for the certificate numbers and check them yourself.

We answer those the same way every time. Tooling, pressing, assembly and inspection are on one site in Xiaolan. Die casting, plating and heat treatment are done by suppliers within half an hour. Our credentials are ISO 14001 and CCC, and you can ask us for the originals and check each number.

Why can two identical-looking locks differ?

Two levers can look the same in a photograph and still come from different tools. Hole positions, spindle size and backset are fixed when the tool is cut. A buyer who orders from a picture gets the picture, not the fit.

So compare on figures. Take a lever on a backplate such as 5039-340. It has a 230 × 50mm plate, a 50mm centre distance, a 38-50mm door thickness range and a 5045 lock case. Those are the figures that decide whether it goes on your door. Ask any supplier for the same figures in writing. Where a figure is missing, ask for the drawing.

What does a good sample process look like?

A sample proves one piece. An order needs the tenth container to match it. The link between the two is a clear record of what you approved.

• Agree the structure and dimensions on paper before tooling starts.
• Fit the sample to a real door, not a bench.
• Keep the approved sample, and have the factory keep one too.
• Refer to that sample and that drawing in your purchase order.

We run custom work in five steps, and every dimension follows the sample you signed off.

Is it worth visiting Xiaolan?

If the order is large or the part is new, yes. One day in the town shows you how the trades connect, and it lets you meet the people who will answer your email later. Bring your drawing, your sample and your questions. Ask to see the part being made, not only the showroom.

If you cannot travel, ask for photographs of the actual works, and for a video call on the line. Every factory photograph on our site was taken in our own works, and every product photograph is of the real part.

What do Xiaolan factories make?

The town is known for mechanical locks, and many factories make the hardware around them too. Our own range covers 240 lever handles, 80 hinges, 105 stainless steel handles, and floor springs, glass door handles and bathroom hardware. See the full range, or read how the works is set up.

What to write on your first enquiry

Name the model or send a drawing. State your door, your finish and your expected quantity. Ask which steps run on site. MOQ, price and lead time are confirmed per model, so ask for them on the part you actually want. Tell us about your project and we will answer those questions in writing.