Dalang Precision CNC Processing Cost Guide
This guide is for engineers and sourcing managers who need to read a dalang precision cnc processing cost quote line by line. It covers the cost drivers we see every week, the tolerances and finishes that move a price most, and the questions that separate a real quote from a placeholder number.
In this article
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Key takeaways
What moves a dalang precision cnc processing cost quote
Typical direction of each driver. Percentages are ranges we see on real RFQs, not fixed rates.
| Driver | Low-cost case | High-cost case | Effect on unit price |
|---|---|---|---|
| Geometry | Prismatic plate, 2 setups | Deep pockets, thin walls, 5-axis | +40% to +180% |
| Tolerance | ±0.05 mm general | ±0.005 mm on bores and bores | +15% to +60% |
| Surface finish | Ra 1.6–3.2 μm as machined | Ra 0.2–0.8 μm polished | +10% to +45% |
| Quantity | 500+ parts, one fixture | 1–10 parts, prototype fixtures | Setup is 30–70% of price |
| Material | 6061 aluminium | Inconel, Ti-6Al-4V, 17-4PH | +20% to +300% |
| Inspection | Sample check, report on request | 100% inspection, CMM reports | +5% to +20% |
| Certification | Standard shop | IATF 16949 or ISO 13485 trace | +5% to +15% |
| Lead time | 3–5 days standard | Rush with overtime shifts | Premium, ask first |
How a dalang precision cnc processing cost quote is built
Every quote has four cost pools: material, machine time, setup and secondary operations. Material is the easiest to check. Print the stock size, add saw kerf, multiply by the density and the current mill price. If the line is far above that number, ask why.
Machine time is where quotes diverge. A 3-axis cut on a 6061 bracket might run 8 minutes. The same bracket in 17-4PH with a ±0.005 mm bore and a 5-axis cycle can run 45 minutes. The hourly rate matters less than the minutes, so always ask for cycle time per operation.
Setup covers fixtures, first-article checks and programming. On one prototype, setup can be 70% of the invoice. On a 500-piece run, it drops under 5%. This is why the same drawing gets two very different prices.
Secondary operations are finishing, heat treat, plating, laser marking and assembly. Each one adds a handling step and a queue. A part that needs anodize plus laser marking can wait two days longer than the same part left as machined.
- 1Ask for cycle timeMinutes per operation beat a single blended hourly rate.
- 2Ask for stock sizeIt shows whether the material line is realistic.
- 3Ask what is excludedFreight, duty, certs and finishing are the usual gaps.
Tolerance, finish and geometry: the three multipliers
Tolerance is not a single number. A general block tolerance of ±0.1 mm is normal shop work. A ±0.005 mm bore needs a rigid setup, a temperature-stable room and a CMM check. That one callout can add a second operation.
Finish behaves the same way. As-machined at Ra 1.6–3.2 μm comes off the tool. Ra 0.8–1.6 μm may need a finish pass. Ra 0.2–0.8 μm needs polishing, and polishing is manual labor on most parts.
Geometry sets the number of setups. A part with features on five faces forces a 5-axis cycle or three separate fixtures. Both cost more than a plate cut from two sides. Thin walls under 1 mm also slow the feed rate, because chatter ruins the finish.
The engineering question is simple: does the function need that tolerance or finish? If a bore only locates a pin, ±0.02 mm is often enough. Saving money starts at the drawing, not at the quote.
- 1Tolerance only where it mattersPut tight tolerance on functional features, general tolerance on the rest.
- 2Avoid thin unsupported wallsBelow 1 mm, expect slower feeds and a higher scrap risk.
- 3Deep pockets need long toolsA depth over 4× tool diameter raises deflection and time.
Quantity, material and certification costs
Quantity changes the shape of the price curve. From 1 to 50 parts, setup dominates. From 50 to 500, machine time dominates. Above 500, material and finishing dominate. If you plan a pilot run and a production run, quote both now.
Material choice is the bluntest lever. Aluminium 6061-T6 machines fast and is cheap. Stainless 316L is slower and work-hardens. Titanium and Inconel cut at a fraction of the aluminium feed rate and eat tool life. On a small part, the material line can exceed the machining line.
Certification is not a marketing line. IATF 16949:2016 adds traceability, PPAP-style documentation and process control. ISO 13485:2016 adds validation records for medical parts. Both raise the administrative cost, but they also mean the paperwork survives an audit.
Ask for the material certificate and the inspection report before you place the order. If a supplier cannot show a sample report, the certification claim is worth checking.
- 1Quote prototype and production togetherIt shows how the price curve drops and where it flattens.
- 2Match material to functionDo not pay titanium prices for a bracket that only needs stiffness.
- 3Confirm the cert scopeAsk which plant and which process line holds the certificate.
Lead time, MOQ and hidden risk items
Lead time is a cost line even when it is not printed. Our standard flow is a quotation and free DFM analysis within 12 hours, production start within 24 hours and parts shipping in 3–5 days. If a project needs a compressed schedule, say so at RFQ stage, not after the PO.
Minimum order quantity is another hidden cost. Some shops charge a setup fee below 100 pieces, or refuse one-off prototypes. We run from one prototype to 10,000+ part runs with no minimum order quantity, so a single bracket and a 10,000-piece batch use the same quote path.
Confidentiality matters when the part is a new design. Uploads are secure and confidential, and an NDA is available on request. Ask for it before you send the STEP file, not after.
The last risk item is communication. A quote that arrives with DFM comments tells you the supplier read the drawing. A quote that is just a number tells you nothing.
- 1State the target date at RFQRush work is possible but it changes the quote.
- 2Send STEP plus a 2D drawingGD&T on the drawing controls the tight features.
- 3Request the NDA earlyIt costs nothing and protects the design.
How to compare quotes in six steps
- 1Normalize the scopeAsk every supplier to quote the same revision, the same quantity and the same finish. A quote on 10 pieces against a quote on 100 pieces cannot be compared.
- 2Break the price into linesRequest material, machine time, setup, finishing, inspection and freight as separate lines. A single lump sum hides the driver you can change.
- 3Check the material lineCompare the quoted stock size and alloy against your drawing. A 6061-T6 part quoted in 6061-T651 is a different material.
- 4Check the tolerance calloutsConfirm which features carry ±0.005 mm and which carry general tolerance. If every dimension is tight, the price is inflated.
- 5Check inspection and reportsAsk what is measured, on what machine, and whether the report ships with the parts. 100% inspection before shipment is our default.
- 6Check the schedule in writingGet the production start and ship date in the quote. A verbal promise is not a schedule.
Frequently asked questions
Why do two shops quote the same part so differently?
The gap is usually cycle time and setup, not hourly rate. One shop may run a 5-axis cycle with one fixture; another may use three 3-axis setups. The second is cheaper to program and slower to run.
Material sourcing also differs. A shop that buys cut-to-size stock pays more per kilogram but wastes less. Ask for the stock size and the cycle time before you compare the total.
Does a tighter tolerance always cost more?
Only on the features where it applies. Tightening one bore to ±0.005 mm adds a gauging step and slower feeds. Tightening a non-functional slot does the same with no benefit.
Our general tolerance is ±0.005 mm on controlled features, and we will tell you in the DFM review when a callout is tighter than the function needs.
How does quantity change the unit price?
Setup is fixed, so it spreads across the batch. On 1–10 parts, setup can be 30–70% of the price. On runs above 500 parts, it falls under 5% and material dominates.
We have no minimum order quantity, so you can start with one prototype and scale to 10,000+ parts without changing suppliers or re-qualifying the process.
What certifications should I ask for before ordering?
It depends on the end market. Automotive and EV work usually needs IATF 16949:2016. Medical devices need ISO 13485:2016. General industrial work needs ISO 9001:2015.
We hold ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022. Ask which certificate covers the plant and process that will run your part.
Can I reduce cost without changing the design?
Yes, within limits. Combine quantities to spread setup, accept as-machined finish on non-cosmetic faces, and let the shop choose the stock size.
The larger savings come from the drawing. Open a tolerance that does not affect function, remove a cosmetic finish from a hidden face, or replace a 5-axis feature with a 3-axis feature plus a dowel pin.
How fast can a quote and a first article be delivered?
We return a quotation and a free DFM analysis within 12 hours. Production can start within 24 hours of order confirmation, and parts ship in 3–5 days.
Every part is inspected before shipment, with raw material checks, in-process monitoring and a final inspection. Reports are available on request.
Send your drawing and get a line-by-line quote
Upload a STEP file and a 2D drawing. You get a quotation and a free DFM analysis within 12 hours, with the cost drivers broken out so you can see what to change.
Quote in 12 hours100% inspectionNo MOQNDA on request
More from the shop floor
We publish setup notes, tooling trials and inspection data from the factory floor.
