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How to Read a CNC Quotation Line by Line: 12 Lines, 4 Red Flags, and the Questions That Close Each Gap

Finished CNC machined aluminium parts on a bench at Ningbo Renjiu Machinery, ready to be packed against a quotation

Most quotations arrive as a four-line email: part name, quantity, unit price, lead time. The buyer reads the unit price, checks it against the last supplier, and answers yes or no. That is a decision made on one number out of roughly twenty that a machining quotation actually contains — and the other nineteen are where both the money and the risk sit.

This article is a decoder, not a comparison guide. Comparing suppliers is a separate exercise (we wrote about that in why two suppliers quote the same part three times apart). What follows is narrower and more basic: how to read one quotation, line by line, so that you know exactly what you are agreeing to before you sign it. At Ningbo Renjiu Machinery we write quotes for a living and receive them for bought-out work; the twelve lines below are the ones we insist on in both directions.

Why the Line Items Matter More Than the Total

A quotation is not a price. It is a scope document with a number attached, and the number is only meaningful inside that scope. Two quotes at $12.80 and $14.80 can describe two different objects: one includes anodising, a first-article report and delivery to your door; the other is bare metal, visually inspected, collected from a factory gate. The totals look comparable. The parts are not.

There is a second reason to read line by line. Lines tell you what is missing. A quotation almost never lies — it just stops early. If there is no tooling line, tooling is either free (rare) or excluded (common). If there is no inspection line, inspection is either included in the machining rate or not happening. You cannot ask about a line you did not notice was absent, so the discipline is to run every quote against a fixed list rather than reading it as prose.

The Twelve Lines Every Readable Quotation Contains

This is our audit list. Any quote that answers all twelve is readable; any quote missing three or more is a draft, not an offer. The right-hand column is the single question that closes each gap — one email, twelve questions, and most of the ambiguity in a quotation disappears.

Line	What a readable quote states	Common failure	Question that closes it
1. Material	Grade, temper, blank size and weight, whether a mill test report is included	"Aluminium" with no grade; blank size absent so utilisation is invisible	"What blank size and weight are you pricing, and is the MTR included?"
2. Machining	Cycle time per part and the machine class it runs on	Only a rate, or only a unit price with no time component	"What is the cycle time and on what machine?"
3. Setup and programming	Hours, rate, and whether it is inside the unit price	Bundled invisibly into the piece price; only surfaces at low quantity	"Is setup included at this quantity, and what is the one-off if we order 50?"
4. Tooling and fixtures	One-off cost, whether amortised, and who owns the fixture	Omitted entirely; appears as a surprise charge after PO	"Is any custom fixturing needed, and is that cost included?"
5. Surface finishing	Process, specification and thickness or Ra class	"Anodised" or "as machined" with no class	"Which anodising class and thickness, and is masking included?"
6. Inspection	First-article report, CMM sample plan, or visual only; AQL if sampling	Silence, which in practice means visual	"What inspection is included in this price?"
7. Packing	Method and cost — bulk, individually bagged, ESD, VCI, export crate	Assumed bulk; damage in transit becomes your problem	"How is it packed, and is packing in the price?"
8. Freight and Incoterm	EXW, FOB, CIF or DDP, named port, and who clears customs	Silent, which usually means EXW	"Which Incoterm, and what is the landed cost to [city]?"
9. Quantity breaks	Unit price at two or three quantities, and the MOQ	Single quantity only, so you cannot see the setup curve	"What is your price at 200 and at 500?"
10. Lead time	Working days from PO plus drawing approval, broken into stages	"15 days" with no start condition and no material lead time	"Does that clock start at PO or at drawing approval, and does it assume material in stock?"
11. Validity	An explicit date, and the metal index basis if the part is material-heavy	No validity; price quietly re-set at PO	"How long is this price valid?"
12. Payment and ownership	Deposit and balance terms, currency, and who owns tooling, fixtures and programs	Terms agreed verbally; tooling ownership never discussed	"What are the payment terms, and do we own the fixture and the programs?"

Where the Money Actually Sits

Before decoding individual lines it helps to know what proportion each one normally carries. Across the quotations we issue, the split is remarkably stable by part type — and when a quote's internal proportions are off, that is itself information.

Part type	Material	Machining	Setup	Finishing	Inspection and packing
Turned spacer, 6061, no finish, 500 pcs	22-26%	55-60%	4-6%	—	3-5%
Plate bracket, 6061-T6, clear anodise, 200 pcs	23-28%	42-48%	5-8%	12-18%	5-8%
5-axis housing, 7075, hard anodise, 50 pcs	18-24%	50-58%	10-14%	8-12%	6-9%
Tight-tolerance 316L part, +/-0.01 mm, 100 pcs	20-25%	48-55%	12-16%	3-6%	8-12%

Two rules of thumb fall out of that table. First, material plus machining should account for 75-88% of the quoted unit price at production quantities. If a quote sits at 60%, the remaining 40% is setup, tooling, finishing, freight or margin — find out which, because that is the part you can negotiate or delete. Second, setup share falls fast with quantity. A quote where setup is still 20% of the unit price at 500 pieces is telling you either that the fixture is expensive or that the shop has not really amortised it.

The Four Lines That Decide Cost

Line 1, material. The number to check is not the price per kilo but the implied utilisation: blank weight divided by finished weight. A bracket that keeps 65% of its blank is normal for plate work; a shaft that keeps 35% is normal for bar work; a quote implying 15% on a simple plate part means somebody is buying a block to make a plate. Our material versus machining cost breakdown shows where that allowance goes — and why a more expensive alloy sometimes produces a cheaper part.

Line 2, machining. Cycle time is the honest line in any quote, because it is the one that can be checked against the part. A 130 x 90 mm bracket with two tight holes and a pocket cannot be made in three minutes on a 3-axis machine; if a quote says it can, either the routing is different or the time is a guess. Compare cycle time per feature rather than per part.

Line 3, setup. Setup is a fixed cost that gets divided by your quantity, and that division is where most low-volume quotes hide their real price. Three and a half hours at $48/hr is $168: $3.36 per part at 50 pieces, $0.67 at 250, $0.34 at 500. The full mechanics, including why the same shop is competitive at 500 and expensive at 20, are in our setup cost explanation. The practical rule: always ask for setup as its own line so you can re-amortise it at your real quantity instead of the one in the quote.

Line 4, tooling. Soft jaws are consumable and usually absorbed. A dedicated fixture is not: $400-1,200 is normal for a machined aluminium or steel fixture on a part with a difficult datum, and $2,000-4,000 is not unusual for a hydraulic or vacuum fixture on a thin-wall part. Three things to confirm in writing — whether the fixture cost is one-off or amortised into the piece price, whether you own it after the order, and whether it transfers if you move the part to another supplier. If the answer to the last one is no, you have just bought a part with a permanent single source.

The Four Lines That Decide Whether You Can Accept the Parts

Line 5, finishing. "Clear anodise" covers a 5-25 micron range with very different cosmetic results, and at the thin end you can polish through the coating during handling. Type II decorative anodising is typically 10-15 micron; hard anodising (Type III) runs 25-50 micron and changes the dimension by roughly half the coating thickness per surface — which matters on a +/-0.02 mm bore. Specify the class, the thickness, and whether masking of threads and mating faces is included.

Line 6, inspection. There are only three answers worth accepting: a first-article inspection report on the first piece, a documented CMM sample plan at a stated frequency, or visual only. "We check every part" is not an answer, because it does not say against what. For a tolerance-critical part, the FAIR is the cheapest insurance in the whole order — typically $0.40-1.00 per part at 100-200 pieces.

Line 7, packing. Anodised cosmetic parts shipped bulk in a single bag arrive with scratches, and scratches are the number one reason an anodised lot gets rejected. Individually bagged or foam-interleaved packing costs $0.15-0.40 per part and removes most of that risk. VCI paper for steel, ESD bagging for anything going near electronics, and an export crate for anything over 300 kg are all lines that should appear before they become a claim.

Line 8, freight and Incoterm. This is the line that most often turns a cheap quote into an average one. EXW means you own the goods at the factory gate and pay the forwarder, the export declaration and the insurance yourself; FOB adds the inland leg and export clearance; CIF adds sea freight and minimum insurance; DDP puts everything including duty on the supplier. A $12.80 EXW quote and a $14.20 DDP quote are frequently the same number. Compare landed cost, not quoted cost — the free CNC machining cost calculator will do the per-part arithmetic once you know the freight figure.

The Four Lines Buyers Forget Entirely

Line 9, quantity breaks. A single-quantity quote hides the setup curve and removes your ability to plan. Ask for two or three quantities. A well-built quote will show the unit price dropping steeply to the MOQ, then flattening; a badly built one shows a suspiciously flat line, which usually means setup was buried in the piece price and you are paying for it at every quantity.

Line 10, lead time. "15 days" is not a lead time until you know what starts the clock and what it assumes. A realistic machining lead time is material lead (2-10 working days depending on grade and size, longer for 7075 or titanium) plus queue at the machine, plus cycle time times quantity, plus finishing (3-7 working days for anodising, often the real bottleneck), plus inspection and packing. If a quote promises 10 days on a hard-anodised 7075 part with no stock, one of those stages has been left out — and it will be the one that slips.

Line 11, validity. Fifteen to thirty days is normal. Aluminium and stainless move; a quote with no validity date is not a price, it is an indication. On material-heavy parts, ask for the metal index basis — if the quote says "based on LME aluminium at the date of quotation", you know exactly what you are exposed to.

Line 12, payment and ownership. Thirty per cent deposit and seventy per cent before shipment is standard for a first order from a Chinese supplier; net-30 comes after a history. Currency matters too: a USD quote against an RMB cost base carries a few per cent of exchange risk that somebody has to hold. And ownership: fixtures, CAM programs, and the inspection data are assets. Get it in writing that they are yours.

Red Flags, Line by Line

None of these is proof of a bad supplier. Each is a signal that a line needs one question before you commit.

What you see	What it usually means	What to do
No setup line at any quantity	Setup is inside the unit price, or the quote is for a part they already run	Ask for the one-off separately, then re-amortise at your quantity
Price identical at 100 and at 1,000	Setup buried in the piece price, or the quote was built from a price list	Ask what changes between the two quantities
"Anodised" with no class or thickness	Whatever the local line runs that week	Specify class and micron range; ask about masking
Inspection not mentioned	Visual only, in practice	Ask for a FAIR on the first piece — it is cheap
No Incoterm in the quote	EXW by default	Ask for both EXW and DDP so you can see the real gap
No validity date	Price will be revisited at PO	Ask for a validity date and the metal basis
Cycle time implies a routing the tolerance cannot hold	The price is a guess, not a plan	Ask how many setups and on what machine
Tooling mentioned only after the PO	Fixture cost was never priced	Ask before ordering, and ask who owns the fixture

One Quote, Read Two Ways

Here is a real pattern we see on incoming quotes for a bought-out assembly bracket. The quoted number is $12.80 at 200 pieces. Read in ten seconds it looks competitive. Read line by line, it is a different order.

Item	As quoted	What it actually costs
Unit price, 200 pcs	$12.80	$12.80
Tooling / fixture	not mentioned	+$480 one-off (fixture), +$2.40/pc
Anodising	"clear anodise" included	5-8 micron cosmetic grade; 15 micron class adds $0.55/pc
Inspection	not mentioned	visual only; FAIR adds $0.90/pc
Packing	bulk bag	individual bagging for cosmetic parts +$0.25/pc
Freight	EXW Ningbo	+$0.62/pc landed, DDP
Validity	none	re-priced at PO; assume +2% metal movement
Comparable cost per part	$12.80	$17.78

Nothing in that quote was dishonest. Every gap was a line that simply was not written, and every one of them was discoverable with the twelve questions above. This is the whole case for reading line by line: the difference between $12.80 and $17.78 was never in the price, it was in the scope.

How We Write Quotations at Renjiu

Because we spend as much time reading other people's quotes as writing our own, our quotations out of Ningbo are deliberately built to be audited by a stranger:

Material line with blank size and weight, so utilisation is visible without an email.
Cycle time and machine class, so you can see which routing you are buying — and a note if a cheaper routing exists at your volume.
Setup as its own line whenever it is material to the unit price, with the one-off stated for low quantities.
Tooling stated separately, with ownership in writing.
Finishing to a named specification — class, thickness, masking — not a one-word description.
Inspection scope in writing: first-article report and CMM sample plan, and what is not covered.
Ex-works and landed options side by side, so the comparison against a domestic quote is honest.
Lead time broken into stages, with the start condition named.

Send a drawing through our quotation page and you will get that structure back, usually within one working day. If you already have a quote in hand and want a second pair of eyes on it, send that too — we will tell you which line looks thin, which is standard, and where the missing lines are. That is a more useful conversation than a number ten cents lower.

Frequently Asked Questions

What should a CNC machining quotation include?

At minimum: material grade and blank size, cycle time and machine class, setup as a separate line or an explicit statement that it is included, tooling and fixtures, finishing to a named specification, inspection scope, packing, Incoterm, quantity breaks, lead time with a start condition, validity, and payment terms. A quote that answers all twelve can be compared against any other quote; one that answers four cannot be compared against anything.

Why do some suppliers quote no setup cost at all?

Three reasons, and it is worth knowing which. The shop may be burying setup in the unit price (common at high volume), it may already have the fixture and program from a previous order (genuinely free to you), or it may be quoting from a price list without engineering input (which usually shows up later as a delivery slip). Ask directly: "is setup included, and if so at what amortisation?"

Is a 7-day quote validity normal?

It is short but not unreasonable on material-heavy parts when the metal market is moving. Ten to thirty days is the normal range. If a quote has no validity at all, treat the number as an indication rather than an offer, and expect it to be revisited at PO. On stainless and aluminium parts where material is 20-25% of the price, a 3% metal movement is roughly a 1% change in the part price — small, but real.

How do I compare a quote quoted EXW with one quoted DDP?

Add freight, insurance, export clearance and duty to the EXW number, then divide by quantity. On a 200-piece order of a 130 x 90 mm bracket, that is typically $0.50-0.80 per part — enough to close a 5% price gap between two suppliers. Ask the EXW supplier for a DDP figure as well; most will get one from their forwarder in a day.

What does "tooling not included" mean in practice?

It means the fixture or special tooling needed to hold your part is a separate one-off cost, usually $400-1,200 for a machined fixture and more for hydraulic or vacuum work. Confirm three things before the PO: the amount, whether it is charged once or amortised into the piece price, and who owns the fixture afterwards. If you pay for it, it should be yours, and it should be transferable.