Advanced Custom CNC Machining Solutions 2026

The word advanced gets used loosely. On the shop floor it comes down to four things: how many axes can reach the part in one setup, how tight the tolerance band really is, whether the shop controls its own heat and finish steps, and whether inspection data comes back with the parts. A supplier that only lists machine models on a website is telling you very little.

Part geometry decides the route. A housing with bores on three perpendicular faces is a 3-axis job with two or three setups, or a 5-axis job with one. The second option costs more per hour and less per part, because setup error and fixture count drop. For a run of 20 pieces, 3-axis usually wins. At 500 pieces with a ±0.02 mm bore-to-bore position callout, the single-setup route often pays for itself.

Tolerance is a stack, not a number on a drawing. Flatness, parallelism, position and surface finish interact. If you call out a 0.01 mm flatness on a 300 mm aluminum plate and also want Ra 0.4 μm, the finishing pass may move the part more than the flatness allowance. Machinists will ask which one carries the function. Answer that early and quotes get shorter.

Material behavior sets the ceiling. Aluminum 6061 and 7075 cut cleanly and hold ±0.005 mm on a rigid setup. Inconel and 17-4PH in the hardened state move with heat and tool wear, so the same shop may only hold ±0.02 mm without a finishing strategy. Titanium TC4 sits between the two and needs low cutting speeds to avoid chatter on thin walls.

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  One setup beats threeFewer re-clamps means less position error between features.
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  Tolerance is a systemFlatness, position and finish fight each other on thin parts.
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  Material sets the limitAluminum holds tighter than Inconel at the same machine.

Five-axis simultaneous machining is not always the answer. It is the right call when a part has undercuts, deep pockets with drafted walls, or features on five faces that must stay in one datum. GreatLight runs 16 simultaneous 5-axis centers, 12 four-axis mills, 27 three-axis machines and 16 mill-turn centers. That mix matters because a shop with only 5-axis machines will quote everything as a 5-axis job.

Work envelope limits are the first filter. Our largest travel is 4,000 × 400 × 150 mm for long, slender parts such as rails and beams. Mid-size work sits in 750 × 1,150 × 550 mm or 600 × 600 × 600 mm envelopes, which covers most brackets, housings and manifolds. Compact work runs on 500 × 500 × 450 mm and 500 × 310 × 200 mm machines with a Ø400 mm rotary table for round parts.

Turned parts with cross features go to mill-turn centers. A shaft with flats, cross-holes and a thread can be finished in one cycle instead of two operations and a second fixture. That removes concentricity error between the turned diameter and the milled features, which is the usual failure point on pump and motor shafts.

Prototype quantities are not a problem. There is no minimum order quantity, so a single part and a 10,000-piece run use the same process planning. For one-offs we usually cut from billet on a 3-axis or 4-axis machine and inspect on the CMM. For production, fixtures and probing cycles get built into the program.

Most custom work arrives as aluminum, stainless or steel. We keep 6061, 6061-T6, 2024, 5052, 5083, 6063, 6082, 7075 and ADC12 in the aluminum group. Stainless covers 303, 304, 316, 316L, 420, 430, 431, 440C and 17-4PH. Steels run 1018, 1045, 4130, 4140, 4340, A36 and tool steel. Copper and brass include C101, C103, C110, beryllium copper, C27400, C28000 and C36000. Titanium and special alloys include TA1, TA2, TC4, Inconel and magnesium AZ31B and AZ91D. Plastics cover ABS, PC, PMMA, POM, PA, PEEK, PP, HDPE and carbon fiber.

Finish choice changes the tolerance you can hold. Anodizing adds a few microns per surface and shifts a tight bore. If a bore is reamed to a slip fit, mask it or plan the pre-plate size. Hardcoat anodizing on aluminum is thicker and more dimensionally aggressive than clear anodizing. Electroless nickel, zinc, silver and gold plating behave differently again, and black oxide adds almost nothing.

Cosmetic finishes come after machining and cannot fix a bad surface. Bead blasting hides tool marks; it does not remove a step left by a worn cutter. Tumbling softens edges and can round a sharp corner you needed. Polishing to a mirror on aluminum looks good and scratches easily in handling. Laser marking has a minimum character height of 1.5 mm, so small serial numbers need another method.

We also run die casting, sheet metal fabrication, 3D printing in SLM, SLA and SLS, vacuum casting and mold making. The useful part is not the list itself. It is that a part can move from a machined prototype to a cast housing without a new supplier and a new set of tolerances to argue about.

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  Plate before you reamAnodizing and plating shift bore size by microns.
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  Cosmetics hide, not fixBead blasting covers tool marks but not steps.
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  One chain, one datumMachining, casting and sheet metal under one roof.

Inspection is where a quote either holds up or falls apart. We check raw material on arrival, monitor dimensions in process, and inspect 100% of parts before shipment. Reports are available on request. For a first article or a regulated part, ask for the specific report you need and confirm it before the run starts, not after.

Certifications matter by industry. ISO 9001:2015 covers general quality systems. IATF 16949:2016 is what automotive and EV customers ask for. ISO 13485:2016 applies to medical devices. ISO 27001:2022 covers information security, which matters when you send CAD files and customer drawings. A supplier that cannot show the certificate relevant to your sector is a risk, no matter how good the sample looked.

Our own process holds ±0.005 mm (±0.0002 in) on suitable parts, with a 99.99% qualification rate. Surface finish options run from Ra 0.2–0.8 μm for fine work, Ra 0.8–1.6 μm for standard functional surfaces, and Ra 1.6–3.2 μm as-machined. Those numbers depend on material, geometry and setup. A thin wall in titanium will not hold the same band as a solid aluminum block.

The plant runs 127 high-precision CNC machines across 3 wholly-owned plants with 7,600 m² of floor space and 150 technicians. GreatLight was founded in 2011, and there are locations in Dongguan, China and a Singapore factory at No.3 Joo Koon Circle, Singapore 629032. Volume capacity is one side of it. The other side is having enough people to answer a tolerance question the same day.

Quoting speed is usually the first thing engineers test. We return a quotation and a free DFM analysis within 12 hours. Production can start within 24 hours of approval, and parts ship in 3–5 days. Historical late-delivery probability is below 2%. Treat those as process targets, not guarantees for every geometry, and confirm dates on the order.

The DFM note is worth reading before you approve. It flags features that will need a second setup, walls too thin for the chosen material, tolerances that conflict with the finish, and callouts that need a specific gauge. Fixing those on paper costs nothing. Fixing them after the first article costs a week.

Confidentiality is handled up front. Uploads are secure and confidential, and an NDA is available on request. If your files carry export-control or customer-restricted markings, say so in the first message so the right agreement is in place before drawings move.

For a first order, send the 3D model, the 2D drawing with the functional callouts, the material and finish, and the quantity. Mark which dimensions are critical and which are reference. That single step removes most of the back-and-forth and gets you a quote you can actually compare against another shop.

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  Send the functional calloutsMark critical vs. reference dimensions on the drawing.
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  Read the DFM noteSetup and tolerance conflicts are cheaper to fix on paper.
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  Flag restricted files earlyNDA and handling agreements before drawings move.