Adtech CNC 5 Little-Known Ways to Cut Production Costs

Most of the cost of a machined part is fixed the moment the drawing is released. Wall thickness, corner radii, tolerance callouts and datum strategy decide how many setups the part needs and how many tools get changed. Run the design review before CAM, not after the first article fails inspection.

A useful review is not software alone. A process engineer looks at a sharp internal corner and asks whether a smaller end mill can reach it without chatter, or whether the feature should be relieved. A tolerance of ±0.005 mm on a cosmetic surface is money spent for nothing. Flag it early and the drawing gets cheaper without losing function.

We quote and return a free DFM analysis within 12 hours, so the review happens while the design is still open. Changes at that point cost a drawing revision. Changes after heat treat cost a new part.

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  Undercuts and deep pocketsOften need a second setup or a relieved tool path; both add time.
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  Tight tolerances on non-critical facesAsk whether the assembly actually needs them.
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  Thin wallsBelow roughly 0.8 mm in aluminium, chatter and spring pass show up in the finish.
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  Sharp internal cornersSpecify the largest radius the mating part allows.

Buyers often compare stock price per kilogram and stop there. What matters more is how a material behaves in the spindle and whether it forces secondary operations. Free-machining 6061-T6 cuts fast and takes anodizing evenly. 316L resists corrosion but work-hardens, so tool wear and cycle time climb. 17-4PH gives high strength after aging, and that heat treat is a separate line item plus a schedule risk.

Finishing drives cost in the same way. Anodizing a part that will be bead blasted first means two operations and a handling step. If the surface only needs to be uniform, brushing or tumbling may reach Ra 0.8–1.6 μm and skip the blast entirely. Hardcoat anodizing adds wear resistance but changes dimensions slightly, so tight bores need masking or a pre-plate allowance.

Keeping machining and finishing under one roof removes the shipping, re-inspection and queue time between vendors. We run anodizing, plating, powder coating, black oxide, bead blasting and laser marking in the same supply chain, which keeps one set of inspection records for the finished part.

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  Aluminium 6061-T6Good default for housings and brackets; anodizes cleanly.
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  304 / 316L stainlessCorrosion resistance, slower cutting, watch work hardening.
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  17-4PH (SUS630)High strength after aging; add heat-treat lead time.
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  PEEK and POMDimensionally stable plastics for insulators and wear parts.

Every setup adds fixturing, a datum transfer and an opportunity for stack-up error. A part that needs five faces on a three-axis machine may take four operations. The same part on a simultaneous 5-axis center can often be finished in two, with the rotary table presenting the angled features without a re-clamp.

We run 16 simultaneous 5-axis machining centers, 12 four-axis mills, 16 mill-turn centers and 27 three-axis machines. That mix matters because not every part belongs on a five-axis. Simple prismatic plates with one critical face are cheaper on a three-axis machine with a good vise. Five-axis earns its rate on parts with compound angles, contoured surfaces, or features on four or more faces.

Size also decides the machine. Our largest travel is 4,000 × 400 × 150 mm for long extrusions and rails. Medium work sits at 750 × 1,150 × 550 mm, compact work at 500 × 500 × 450 mm. A Ø400 mm rotary table covers round and cylindrical parts that would otherwise need a second lathe operation.

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  Two setups beat fourFewer datums, less stack-up, shorter queue.
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  Angled featuresFaster on simultaneous 5-axis than on an angle plate.
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  Simple platesStay on 3-axis; the five-axis rate buys nothing.
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  Long partsUp to 4,000 mm travel handles rails and extrusions.

Setup is a fixed cost. If a job takes two hours to fixture and program-prove, spreading it over 200 parts adds 36 seconds per piece, and spreading it over 20 parts adds six minutes. That is why a run of 10 often costs more per part than the same geometry at 500. The question is not whether to batch, but how to batch without building inventory you cannot use.

A practical approach: group parts that share material and fixturing, even if they are different part numbers. Nested bar work on a mill-turn center lets several small diameters come off one bar with one setup. If a design revision is likely, keep the first batch small and hold the tooling, then release the volume once the drawing freezes.

We have no minimum order quantity, so a single prototype and a 10,000-part run go through the same process. Production can start within 24 hours of a released order, and parts ship in 3–5 days. For buyers, that means the batch decision can follow the design decision rather than lead it.

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  Shared fixturingGroup parts with the same stock size and datum.
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  Nested bar workSmall turned parts off one bar, one setup.
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  Hold the toolingCheaper to re-run than to re-fixture from scratch.
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  Freeze the drawingVolume pricing only pays off after the revision stops.

The visible price of a part is material, machine time and finishing. The invisible price is scrap, rework, sorting and late-line penalties. A shop without a documented inspection flow pays for those failures somewhere, and it usually shows up as a rework invoice or a schedule slip rather than a line on the quote.

We inspect raw material on arrival, monitor in process, and inspect 100% of parts before shipment, with reports on request. Our qualification rate is 99.99%, and historical late-delivery probability is below 2%. Those numbers come from the process, not from extra inspection at the end.

Certification matters when your customer audits you. We hold ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022. For automotive and medical programs, the supplier's quality system is part of your own compliance file, so an uncertified shop shifts that risk onto you. Uploads stay confidential and an NDA is available on request.

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  Incoming material checkCatches grade and hardness errors before machining.
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  In-process monitoringCatches drift before a whole batch is out of tolerance.
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  Final inspection100% of parts, reports on request.
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  Certificates on fileISO 9001, IATF 16949, ISO 13485, ISO 27001.