Choose CNC Companies in Georgia: A Buyer's Checklist

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  Five checks that decide the outcome
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  How CNC companies in Georgia compare on the checks that matter
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  Machine capacity: does the shop cover your part or just your drawing
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  Tolerance and surface finish: read the drawing, not the brochure
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  Certification, material traceability and the paperwork trail
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  MOQ, quoting and lead time: where hidden costs live
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  Six steps to shortlist CNC companies in Georgia

Start with size. A shop that runs 500 mm vises cannot quote a 2 m frame no matter how good the price looks. Ask for the actual travel of the machines that would run your job, not the largest machine on the floor. For most Georgia work we see three bands: compact machines around 500 × 500 × 450 mm, medium machines at 750 × 1,150 × 550 mm, and large gantries at 4,000 × 400 × 150 mm.

Axis count matters as much as size. A part with undercuts, deep pockets on five faces or blended surfaces needs simultaneous 5-axis work. If the shop only has 3-axis mills, it will quote multiple setups, and every extra setup adds stack-up error. For housings with tight true position between bores, that error is what kills the assembly.

Fixture space is the part buyers forget. A 400 mm part on a 500 mm table leaves almost no room for clamps. Ask what workholding is available: a Ø400 mm rotary table, tombstones, soft jaws, vacuum plates. If the shop has to build a fixture, that cost and time lands on your quote.

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  Send overall dimensions with the RFQIncluding stock size and any features that overhang.
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  Ask about simultaneous 5-axisNot 3+2 indexing, which still needs multiple setups.
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  Check workholdingRotary tables, tombstones and custom fixtures change both price and lead time.

Every shop says "precision." The useful question is which tolerance it can hold repeatedly, day after day. On a well-maintained machine with temperature control, ±0.005 mm is realistic for bores, bores spacing and critical faces. On a general-purpose mill running hot, ±0.05 mm is more honest. If a supplier quotes ±0.005 mm across a 4,000 mm part, ask how they verify it.

Surface finish follows the same rule. As-machined faces sit around Ra 1.6–3.2 μm. A good high-finish pass gets you Ra 0.8–1.6 μm. Fine finishes in the Ra 0.2–0.8 μm range usually need a second operation such as grinding, lapping or polishing, and that is a separate line item.

Watch for tolerance stacking on multi-feature parts. Ten dimensions held at ±0.05 mm can still produce a bad assembly if the datum scheme is loose. A shop that flags this in the DFM stage is worth more than one that simply says yes to everything.

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  Give the critical featuresMark the two or three dimensions that decide whether the part works.
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  Separate finish from toleranceA tight finish often needs a second operation and a second price.
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  Review the datum schemeStack-up error shows up at assembly, not at inspection.

Certificates are a filter, not a ranking. ISO 9001:2015 covers process control and corrective action. IATF 16949:2016 adds the automotive requirements for PPAP, MSA and traceability. ISO 13485:2016 covers medical device quality systems. ISO 27001:2022 is about how your files and drawings are stored. A shop serving aerospace, automotive and medical work usually holds several of these at once.

Ask for the certificate scope, not just the logo. A certificate that covers "machining of metal components" is useful. One that covers a different site or an expired period is not. If your program needs material certificates, first-article inspection reports or PPAP packages, confirm that before the PO, because generating them later costs more.

Material choice ties into this. Aluminum 6061-T6 and 7075, stainless 303, 304, 316L and 17-4PH, steel 4140 and 4340, titanium TC4 (Ti-6Al-4V) and plastics such as POM and PEEK all behave differently. A shop that keeps these in stock and knows their machinability will give you a cleaner quote than one that has to source every grade.

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  Match certificate to industryIATF 16949 for automotive, ISO 13485 for medical devices.
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  Ask about document packagesFirst-article reports, material certs and PPAP have different costs.
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  Check material stockCommon grades in stock cut both lead time and risk.

Minimum order quantity is where prototypes get expensive. A shop with no minimum will run one part and then scale to 10,000+ without re-quoting the process. A shop with a fixed minimum pushes you into buying parts you do not need yet. If you are in R&D, ask directly whether a single prototype is possible.

Quote turnaround is a signal. A supplier that returns a price plus a DFM note within 12 hours is telling you the engineering team looked at the file. A price with no comments, three days later, usually means the number came from a template. Ask what the quote includes: material, machining, finishing, inspection, packaging and freight.

Lead time needs a written breakdown. Production that can start within 24 hours and parts that ship in 3–5 days is a normal cadence for simple to medium parts. Complex 5-axis work with tight finish or special coating takes longer. Ask for the schedule by operation, not a single date, so you can see where the risk sits.

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  Ask about one-piece runsNo minimum order means the prototype path stays open.
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  Request a DFM note with the priceIt shows the file was actually reviewed.
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  Get the schedule by operationMachining, finishing and inspection have different queues.