Your machine list is a sales document, not an inventory

Almost every machine shop has a capability list. Almost none of them answer the question a buyer is actually asking, which is not “what do you own” but “will my part fit, and will it come out right”.

Those are different questions, and the gap between them costs shops work.

What a typical list says, and why it fails

A common entry looks like this:

Haas VF-3 — 3 axis vertical machining centre — 2 units

A buyer with a titanium part learns almost nothing. They cannot tell whether their 700 mm part fits the travels. They cannot tell whether the spindle has the power for the cut. Most importantly for exotic alloys, they cannot tell whether the machine has high-pressure coolant, which is the figure that governs tool life and chip control more than any other.

What to state, per machine

• Make and model
• Travels, X / Y / Z, in millimetres
• Spindle speed and power — rpm and kW
• Number of axes, and whether the fourth and fifth are simultaneous or positional (3+2)
• Bar capacity and chuck size for lathes, plus whether there is a sub-spindle and live tooling
• Through-spindle coolant pressure in bar — or “flood only”, stated plainly
• Year, which buyers use as a proxy for control generation and condition

Rewritten:

Haas VF-3SS — 3 axis VMC — travels 1,016 × 508 × 635 mm — 12,000 rpm, 22.4 kW — through-spindle coolant 20 bar — 2018 — 2 units

That entry lets a buyer answer their own question in ten seconds. It also quietly tells them you know which numbers matter, which is a capability signal in itself.

The figure most lists omit

Through-spindle coolant pressure is the one to lead with if you want titanium and nickel alloy work.

In these alloys, heat concentrates at the tool-chip interface under the chip, and flood coolant largely does not reach it. Pressure does: it penetrates the vapour barrier, breaks the chip instead of letting it string, and flushes deep pockets. Shops moving from flood to 70 bar through-tool see large tool-life gains, particularly in drilling. The mechanism is covered in high-pressure coolant.

A buyer who understands the material is looking for this number. A buyer who does not will still register that you supplied something specific when your competitors supplied a model name.

If you have flood only, say so. It does not disqualify you from every job, and being straight about it is worth more than being found out at the first article.

Inspection belongs on the list

Machines cut parts; inspection is what makes a buyer believe the parts are right. State it with the same specificity:

• CMM make, model and measuring volume
• Whether calibration is current and traceable to a national standard
• Hardness tester, surface roughness tester, height gauge, profile projector
• Whether inspection is in-house or sub-contracted, and if sub-contracted, the turnaround

“In-house CMM, Mitutoyo Crysta-Apex S 574, calibration current to ISO 10360, certificates available” is a sentence that removes an entire category of buyer doubt. What the certificates themselves commit you to is covered in the paperwork that turns a first order into a programme.

Two photographs beat the whole list

Every shop’s website claims titanium. What separates a claim from a practice is evidence, and the cheapest evidence is two parts you have already shipped.

For each: a photograph of the finished part, the alloy and condition, the tolerance you held, the quantity, and one line on what made it difficult. Redact whatever you need to — the buyer is not trying to identify your customer, they are trying to see whether you have done this before.

Two real parts in the alloy the buyer is asking about will do more than a fifty-machine list. This is also the first thing our supplier standard asks for, for exactly this reason.

Certifications: give the number

If you hold ISO 9001, AS9100, IATF 16949 or a sector approval, state the certificate number and the certifying body.

Certification registers are public. A buyer who can verify your certificate in thirty seconds trusts everything else on the page more. A logo with no number invites the opposite reaction, and increasingly gets it, because logos are easy to copy and buyers know that.

If you are not certified, say what you do instead — documented procedures, incoming inspection, calibration schedule, traceability practice. Plenty of excellent shops are uncertified, and plenty of buyers will accept that when it is described honestly rather than left blank.

Where this ends up

The point of all of it is to let a buyer answer, without contacting you, whether you are worth contacting. That sounds backwards until you remember they are comparing you against shops on three continents using nothing but web pages.

The shop that is easiest to evaluate wins a disproportionate share of first conversations — and, as why good shops lose quotes covers, what happens in that first conversation decides most of the rest.

If your list has the numbers above and two reference parts behind it, you are already most of the way through our shop audit standard. Read it and register.