Atlas CNC Processing Company: Precision Expertise

An atlas cnc processing company is judged first by whether it can physically reach the features on your drawing. GreatLight runs 127 high-precision CNC machines across three wholly-owned plants covering 7,600 m² in Dongguan, plus a factory in Singapore at No.3 Joo Koon Circle. That mix includes 16 simultaneous 5-axis machining centers, 12 four-axis mills, 27 three-axis machines and 16 mill-turn centers. Each type solves a different problem, and putting a part on the wrong one usually shows up as cost or repeatability, not as scrap on the first article.

Five-axis simultaneous work suits parts with compound angles, deep pockets, or features on five faces that would otherwise need three or four separate setups. Every additional setup adds a datum shift. On a housing with true position callouts of 0.02 mm between bores, that shift is often the difference between passing and reworking. Mill-turn centers handle parts that are turned and milled from bar, which removes a second operation and the concentricity error that comes with rechucking.

Large parts have their own constraint list. The largest travel here is 4,000 × 400 × 150 mm, with medium platforms at 750 × 1,150 × 550 mm and 600 × 600 × 600 mm, and compact platforms at 500 × 500 × 450 mm and 500 × 310 × 200 mm. A Ø400 mm rotary table covers round work that needs indexing. If your part exceeds the long travel, the honest answer is that it needs a different process, and we will say so before quoting rather than after.

Tolerance is a system, not a single number. ±0.005 mm (±0.0002 in) is achievable on aluminium and brass parts with stable geometry, sharp tooling and a temperature-controlled floor. It is much harder on a thin-wall stainless bracket where the cutting force itself deflects the wall. When a drawing asks for a tight band on a flexible feature, we look at whether the tolerance is functional or inherited from an older revision. Often a small geometry change makes the part cheaper and more repeatable without affecting function, and we raise that in the DFM review.

Workholding is where most tight-tolerance jobs are won or lost. A part clamped on a vise jaw can move 0.02 mm when the clamp is released. For parts with a flatness or parallelism callout under 0.01 mm, we use custom soft jaws, vacuum plates or fixtures machined in place on the same machine that cuts the part. Fixtures that travel between machines carry their own stack-up, so we keep the critical operation on one platform whenever the geometry allows.

Thermal drift matters on long cycle times. A 40-minute cut on a 300 mm aluminium plate will grow as the spindle and the part warm up. We rough, let the part stabilize, then finish. On parts where the drawing permits, a semi-finish pass followed by a light finish pass removes the deflection left by the roughing load. These are not exotic techniques. They are the routine choices that separate a shop that hits tolerance on the first article from one that hits it on the third attempt.

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  Rough then finishSeparate passes let the part and fixture settle before the final cut.
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  Fixture on the machineSoft jaws and vacuum plates machined in place remove datum shift.
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  One platform per critical featureKeep the tight callout on the machine that established the datum.
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  Function over inheritanceQuestion tolerances that were copied from an old revision.

Aluminium is the default for prototypes and most enclosures. Grades stocked here include 6061, 6061-T6, 2024, 5052, 5083, 6063, 6082, 7075 and ADC12. The T6 condition machines cleanly and holds a fine finish, while 7075 gives higher strength at the cost of faster tool wear. 2024 tends to move after machining if the part is thin, so we plan a stress-relief step or leave stock for a second pass.

Stainless and steel cover the load-bearing side. We machine 303, 304, 316, 316L, 420, 430, 431, 440C and 17-4PH (SUS630), plus carbon and alloy steels 1018, 1045, 4130, 4140, 4340, A36 and tool steel. 303 is the free-machining choice for fittings and bushings. 316L is common on medical and food-contact parts, and 17-4PH is used where corrosion resistance and yield strength both matter. Titanium and high-temperature alloys TA1, TA2, TC4 (Ti-6Al-4V), Inconel and magnesium AZ31B / AZ91D are available but need slower feeds and more tool changes, which shows up in the quote.

Plastics behave differently again. ABS, PC, PMMA, POM, PA, PEEK, PP, HDPE and carbon fibre are all machinable, but they cut by shearing rather than chip forming. Heat buildup is the main risk. PEEK and carbon fibre need sharp, coated tooling and air blast rather than flood coolant. For thin plastic walls, we reduce radial engagement and accept a slower cycle to avoid melting the edge. Copper alloys C101, C103, C110, beryllium copper, C27400, C28000 and C36000 sit between the two groups and machine well with the right speeds.

Inspection is planned before the first cut. Raw material arrives with a mill certificate and is checked against the drawing before it goes to a machine. In-process monitoring covers critical dimensions during the run, not just at the end. Every part gets a 100% inspection before shipment, and dimensional reports or CMM data are available on request. The qualification rate across production runs is 99.99%. That number only means something alongside the inspection method, so we list the gauge and the sampling plan on the report.

Certification matters when your customer audits your supply chain. GreatLight holds ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022. The automotive and medical standards drive documented traceability, change control and calibration schedules. ISO 27001 covers how drawings and CAD files are stored and shared. Uploads are treated as confidential, and a signed NDA is available on request through our non-disclosure agreement page.

Post-processing can be quoted as part of the same order. Anodizing in clear, color, hardcoat and conductive versions, electroless nickel, zinc, silver and gold plating, powder coating, black oxide, bead blasting, tumbling, brushing and polishing are all handled under one roof. Keeping finishing in the same supply chain removes the risk that a part is damaged or lost between vendors, and it keeps the finish specification tied to the machining plan. Laser marking is available down to a minimum character height of 1.5 mm for traceability.

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  Raw material checkMill certificate verified against the drawing before machining.
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  In-process monitoringCritical dimensions checked during the run, not only at the end.
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  100% final inspectionEvery part inspected before shipment, reports on request.
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  Four ISO systems9001, 16949, 13485 and 27001 certificates maintained.

The first step is a quote and a free DFM analysis, both returned within 12 hours. The DFM note flags thin walls, tight tolerances that may not be functional, tool reach problems and features that would be cheaper on a different platform. You get a drawing-level response, not a form letter. Production can start within 24 hours of approval, and parts typically ship in 3–5 days depending on quantity and finishing. Historical late-delivery probability is below 2%.

Volume is flexible. There is no minimum order quantity, so a single prototype and a 10,000+ part run go through the same quoting process. Prototypes are usually cut from the production process rather than a substitute, which means the first article tells you something real about the run. When a design is still moving, we can quote the critical features and hold the rest until the geometry locks.

Send STEP, IGES or native CAD files plus a 2D drawing with tolerances and finish callouts. If the drawing is incomplete, the DFM review will list what is missing. That saves a round of email and usually a round of rework. For parts that need material certificates, first article inspection reports or specific packaging, state it at quote time so it is built into the plan.

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  12-hour quoteQuotation and free DFM analysis within 12 hours of upload.
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  Fast startProduction can begin within 24 hours of approval.
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  No MOQFrom one prototype to 10,000+ part runs.
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  ConfidentialSecure uploads, NDA available on request.