Why We Ship Sheet Metal From a Single Piece

A 1,000-piece minimum order is not a quality control measure. It is a filter, and its job is to keep small buyers out.

That is not a criticism – it is a rational response to a cost structure. But it is worth understanding what the filter is doing, because it explains both why so many factories refuse small orders and why we decided not to.

Where the minimum actually comes from

Every order carries fixed costs that do not scale with quantity. On a stamped or folded part, those costs are:

• Tooling. A press tool for a simple bracket can run into thousands of dollars; a progressive die for a complex part is a multiple of that. Someone has to pay for it, and it is amortised across the first order.
• Setup. Changing a die on a press, dialling in the stroke, adjusting the feeder and running first-off samples takes time – often two to four hours for a straightforward part.
• First-article inspection. The first parts off a new setup get measured against the drawing before anything else runs. That is engineering time, and it is the same whether you make 50 parts or 50,000.
• Scrap during ramp-up. The first handful of parts after a setup are usually scrap while the operator dials in. On a short run, that scrap is a large percentage of the order.

Divide those fixed costs by 30 pieces and the piece price looks absurd. Divide them by 30,000 and they disappear. That is the whole story behind the 1,000-piece minimum, and it is arithmetic rather than arrogance.

What changes when the item is already in production

The arithmetic changes completely for a part that already exists in our catalogue, because the fixed costs have already been paid. The tooling exists. The process parameters are proven. The first-article inspection was done years ago, and the operator has run the part hundreds of times.

That is the only reason we can offer a one-piece minimum on stock items. There is no subsidy involved and no special favour: the marginal cost of the next unit really is just material, machine time and finishing. Custom parts, where a new tool has to be made, still carry tooling and setup – and we quote those separately rather than hiding them in a piece price.

One thing we will not do is pretend the small-order price is the same as the volume price. It is not, and any supplier who claims otherwise has buried the difference somewhere.

What a one-piece order actually costs you

Being honest about the downsides is more useful than a sales pitch:

• The unit price is high. On a stock item, a single piece can cost two to three times the volume price. You are buying convenience, not economy.
• You do not get priority scheduling. A single piece fits into a gap in production. If a container order lands the same week, the container goes first.
• Freight dominates. Shipping one enclosure across the world can cost more than the enclosure. Consolidating several small items into one shipment is usually where the real saving is.
• You are buying a sample, not a supply agreement. One piece tells you whether the design works. It does not tell you what a production run will look like.

Read that list and the use case becomes obvious: a one-piece order is for validation, not for procurement.

When starting from one piece is the wrong move

There are cases where a small first order wastes everyone’s time:

• The design is already frozen and volumes are real. If you know you need 5,000 units and the design is not going to change, go straight to a volume quote. Sampling first just adds a step.
• You need a custom tool and only want ten parts. In that case, ask about a fabricated prototype instead of a tooled part – laser cut and folded, not stamped. It costs more per piece and nothing in tooling, which is the right trade at low volume.
• The part is price-critical at scale. If the business case only works at a very low piece price, sampling from a high-cost channel tells you nothing useful about the real economics.

We would rather say this up front than take an order that disappoints.

How to get real value out of a one-piece order

Small orders earn their cost when they are used as evidence. The buyers who do this well tend to do four things:

1. Test the actual failure mode. Drop it, load it, run it hot, mount it on the real cabinet or rack. A sample that survives your test is worth more than a datasheet.
2. Check the interfaces, not the cosmetics. Hole positions, panel thickness at the weld, thread depth, the way the lid seats. These are what break at volume.
3. Photograph it properly. A real sample in real light is the strongest asset a crowdfunding page or a distributor deck can have.
4. Use the sample to fix the drawing. The point of a prototype is to change the design. If nothing changes after the sample, you probably did not test hard enough.

Then, when the design is settled, the tooling conversation is short – because the process has already been proven on the same equipment.

What we need to quote

Five things, and a drawing covers most of them:

• 2D drawing with tolerances (PDF or DWG)
• 3D model if you have one (STEP), which removes most questions
• Material and surface finish, including colour if powder coated
• Quantity now, and expected annual volume – they get different prices
• Destination market, because it decides which documentation you need

If you have none of that yet and only a sketch, send the sketch. Telling you what is missing is a normal part of the first reply.

Where this fits in our business

We make sheet metal enclosures, cabinet hardware and stamped and fabricated parts across eleven workshops, with 26 power presses and a 350T hydraulic press in house. Keeping fabrication in house is what makes small batches possible: there is no external tooling supplier to negotiate with and no minimum to meet before a machine can be scheduled.

Stock items start at one piece. Custom work starts at a conversation. Either way, send the drawing – we will tell you what we would do, including when the answer is to wait until your volume justifies tooling.

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Written by the gdtokin engineering team — sheet metal and hardware manufacturing in Foshan, Guangdong, China since 2004. Send your drawing for a review and a quotation.