Bellingham CNC Processing Service: What to Check Before You Send a PO

Most parts do not need five axes. A plate with holes, pockets and a flat back face is cheaper and faster on a 3-axis mill, where the tool only moves in X, Y and Z and the part stays in one orientation. We run 27 three-axis machines for exactly that class of work, and the setup is simple enough that fixture cost stays low.

The decision point is access. If a feature sits on a face that cannot be reached without turning the part, and the part has four or more such faces, a five-axis setup usually wins. One clamping holds the part while the table rotates, so the tool reaches compound angles in a single operation.

Four-axis work sits between the two. A rotary table adds an A or B axis, which suits parts with features around a bore or a shaft axis, such as flanges, manifolds and cylindrical housings. Our Ø400 mm rotary tables cover most of that range.

A word on cost. Five-axis time is not automatically more expensive. When a part would otherwise need three or four separate fixtures, the single-setup route is often cheaper and always tighter on position. We quote both routes when the choice is close.

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  3-axisFlat plates, pockets, through holes, one accessible face.
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  4-axisFeatures around a bore or shaft axis; flanges, housings.
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  5-axisCompound angles, deep cavities, contoured surfaces, four or more faces.
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  Mill-turnRound parts with milled features, cut in one cycle.

Our shop holds 127 high-precision CNC machines across three wholly-owned plants in Dongguan, plus a plant in Singapore. The five-axis group is 16 simultaneous machining centers, backed by 12 four-axis mills, 27 three-axis machines and 16 mill-turn centers. That mix matters more than the headline count. It lets us put a part on the machine that suits it instead of forcing everything onto the newest spindle.

Size range runs from compact work at 500 × 500 × 450 mm up to a 4,000 mm maximum processing size on the large travels, with a 4,000 × 400 × 150 mm envelope for long parts. Medium travels sit at 750 × 1,150 × 550 mm and 600 × 600 × 600 mm. If your part is long and slender, tell us the length in the RFQ so we can check the support plan before quoting.

General machining tolerance is ±0.005 mm (±0.0002 in). Surface finish depends on the operation and the material: Ra 0.2–0.8 μm for fine finishes, Ra 0.8–1.6 μm for high-quality functional surfaces, and Ra 1.6–3.2 μm as-machined. Tight tolerance and fine finish on the same face cost time, so we only apply them where the drawing calls for it.

Every part is inspected before shipment. That means a raw material check, in-process monitoring and a final inspection, with reports available on request. Our historical qualification rate is 99.99%.

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  Five-axis16 simultaneous machining centers.
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  Tolerance±0.005 mm / ±0.0002 in, held on datum features.
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  Fine finishRa 0.2–0.8 μm where the drawing requires it.
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  Inspection100% before shipment; reports on request.

Aluminum is the bulk of what we machine. Grades 6061, 6061-T6, 2024, 5052, 5083, 6063, 6082, 7075 and ADC12 all run regularly. 7075 gives high strength for brackets and structural parts; 6061 machines cleanly and takes anodizing well. If a part needs both stiffness and low weight, 7075 is usually the first question we ask about.

Stainless grades include 303, 304, 316, 316L, 420, 430, 431, 440C and 17-4PH (SUS630). 303 is the free-machining choice for shafts and fittings. 316L and 17-4PH come up in medical and marine work where corrosion resistance or post-hardening matters. Steel covers 1018, 1045, 4130, 4140, 4340, A36 and tool steel.

Copper and brass families include C101, C103, C110, beryllium copper, C27400, C28000 and C36000. Titanium and high-temperature alloys include TA1, TA2, TC4 (Ti-6Al-4V), Inconel and magnesium AZ31B / AZ91D. Plastics run from ABS, PC, PMMA, POM and PA up to PEEK, PP, HDPE and carbon fibre.

Two of these need an early conversation. Inconel work-hardens fast, so tool path and feed have to be planned before the first cut, and we prefer a small trial feature on the stock. Beryllium copper requires controlled handling. Both are doable; neither is a walk-up job. Tell us the material at RFQ time and we will say what it adds.

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  Aluminum6061, 7075, 2024, 5052, 6082 and others.
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  Stainless303, 304, 316L, 17-4PH, 440C, 420, 431.
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  Steel1018, 1045, 4130, 4140, 4340, A36, tool steel.
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  Hard alloysTi-6Al-4V, Inconel, magnesium AZ31B / AZ91D.

A drawing can be machinable and still be expensive. Our DFM pass looks at wall thickness, tool reach into corners, thread depth and the datum scheme. A pocket with a 2 mm internal corner forces a small tool and a long cycle; opening it to 4 mm can cut cycle time without touching function. These are the notes we send back with the quote.

Quotation and free DFM analysis come back within 12 hours. Production can start within 24 hours of approval, and parts ship in 3–5 days for standard work. Historical late-delivery probability is below 2%. Those numbers assume a released drawing and confirmed material. A missing tolerance or an unresolved finish call will push the clock back.

There is no minimum order quantity. One prototype is fine, and so is a 10,000+ part run. For early-stage work, the sample center and rapid prototyping route let you check fit before committing to a production batch.

Uploads are secure and confidential, and we can work under an NDA on request. If your part is controlled or your program is sensitive, say so in the first message and we will route the files accordingly.

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  DFMFree analysis; notes returned with the quote.
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  QuoteWithin 12 hours of a complete RFQ.
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  Ship3–5 days for standard production work.
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  QuantityNo MOQ; one piece to 10,000+.