Design & DFM Support

What this is, and what it is not

It is worth starting with the boundary, because the phrase “design service” means different things to different buyers.

We are a manufacturer, not a design studio. We do not produce concept sketches, product renders, appearance specifications or colour-and-material strategies. Those belong to an industrial designer, and a factory claiming to replace one is usually claiming something it cannot deliver.

What we do is the other half of the same job. We take a design that exists — your drawing, your model, a sketch, a photograph, or a physical sample — and we make it manufacturable, then we make it. That work is called design for manufacturing, and it is the part of the process that decides whether a good design becomes a good part or an expensive one.

The reason it matters is that most of the cost of a machined part is decided before anybody quotes it. The shape, the tolerances, the material and the quantity are in the design. A shop can negotiate on the price of a part; it cannot negotiate away a design that is inherently difficult to make. Catching that in the quotation is the cheapest possible moment to catch it.

What we review, and what comes back

Every quotation includes a written review. It is not a formality — it is the part of the reply that most often changes what the customer orders.

The review covers:

Area	What we look at
Manufacturability	Features that are hard to reach, need a long slender tool, or cannot be cut at all without a different process
Tolerance	Which tolerances are doing work — a fit, a seal, a location — and which are adding cost without controlling anything
Geometry	Thin walls, deep pockets, sharp internal corners, unsupported sections that will deflect under the cutter
Material	Whether the specified grade suits the duty, and whether a different one would produce a cheaper part
Finish	Whether the finish is functional or cosmetic, and how it interacts with the tolerance
Process route	Whether the part should be turned, milled, cast, printed or made in two stages
Quantity	Where the part sits on the cost curve, and whether the volume justifies a different process

Each point comes with what it costs and what could change. That is the difference between feedback and a critique: the note says “this tolerance is adding cost and here is what happens if you relax it”, not “this tolerance is too tight”.

The conversation that saves the most money

If there is one review point that pays more often than any other, it is tolerance.

Tolerance cost does not rise in a straight line as it tightens — it rises steeply as you approach the limit of what the machine and the setup can hold. And most drawings carry tight tolerances on features that do not need them: copied from an earlier drawing, applied as a blanket note, or tightened “to be safe”.

The review asks one question of each tight tolerance: what does this feature do? If the answer involves a fit, a seal, a location or an alignment, the tolerance is earning its cost. If the answer is that it does not mate with anything, the tolerance is being paid for on every part in the batch for nothing.

The same logic applies to the material. The comparison that matters is not the price per kilo — it is the finished part cost, which includes how the material machines, how much of the bought stock becomes a part, and what finishing it needs. The tolerances we hold page sets out what the process is capable of, and the materials page lists the grades we run.

Working from a sample instead of a drawing

Not every part has a drawing, and a missing drawing is not a reason to stop.

Where a physical part exists and its geometry can be measured reliably, we can work from it. That is a common route for replacement components, parts from machinery that is no longer supported, and parts that were made years ago by somebody who kept no records.

The process is straightforward but it depends on agreement rather than assumption:

1. Identify the features that matter — the ones that fit, seal, locate or carry load, as opposed to the ones that merely have to look right.
2. Measure those features and agree the values with you before quoting.
3. Make the part to those agreed dimensions, with ±0.01 mm on the precision features and ISO 2768-m as the general block.
4. Check the first article against the sample before the batch runs.

What we cannot do is guarantee a dimension we cannot measure reliably, so the features that matter most are settled first. That conversation usually takes one exchange, and it is worth having before anything is quoted rather than after the first part arrives.

What to send

A finished drawing is not required, and most enquiries do not arrive as one. Any of these is enough to start:

• A 3D model — STEP, IGES, STL, SLT, or a native format
• A 2D drawing — DWG, DXF, PDF, or a scanned drawing
• A dimensioned sketch — including one drawn by hand and photographed
• A photograph of an existing part, with the key dimensions marked on it
• A physical sample, where one can be sent

The one thing worth adding to any of them is what the part has to do. Where it fits, what it carries, what environment it lives in, whether it is welded, and how many you expect to need. That context is what turns a price into a recommendation, and it costs one sentence. The drawing requirements page covers file formats and what each one needs to contain.

How the review runs

1. You send what you have — through the quote form on this site or by WhatsApp.
2. We review it against how it will be made — geometry, tolerance, material, finish, process and quantity.
3. You get the price and the notes back within 24 hours, in writing, so there is a record of both.
4. You decide what to change, if anything. Nothing is made until you approve the revision.
5. The first article is checked against the agreed drawing before production runs, and samples ship in 5–10 days.

The order starts at 50 pieces per style and material, with samples available from a single piece. Production runs in 25–35 days after sample approval, and every batch ships with a material certificate (MTR) traceable to the mill heat plus pre-shipment photos of the actual parts — see what ships with your order.

Why the review is free

Because it is cheaper for both of us.

A part that quotes badly because of a tolerance nobody needed, a material that machines poorly or a feature that cannot be cut is a part that will be re-quoted, re-designed or made at a price the customer resents. Reviewing it at the quotation stage takes minutes. Discovering it at the first article takes weeks and costs a batch.

That is the whole argument, and it is why the review is included rather than sold: the sooner a problem is found, the less it costs to fix, and the quotation is the earliest point at which anyone with the machines can see it.