5 Axis CNC Factory: What to Check Before You Place an Order

Five-axis machining means the cutter can reach a part from directions that three-axis work cannot. Two of the five axes are rotary: the table tilts and rotates, or the spindle head does. The practical result is that a complex part can often be finished in one setup instead of four or five.

A factory is not five-axis because it owns one five-axis machine. The label applies when the shop can plan setups, program toolpaths, and inspect the result at that level every day. That means CAM programmers who understand collision checking, tool holders that clear deep pockets, and a metrology bench that can verify a tilted datum.

At GreatLight we run 16 simultaneous 5-axis machining centers among 127 high-precision CNC machines. The rest of the floor matters too. Twelve four-axis mills, 27 three-axis machines, and 16 mill-turn centers handle the features that do not need five axes, which keeps cost down on simple parts.

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  Simultaneous, not indexedAll five axes move together while cutting. Indexed 3+2 locks the rotary axes first.
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  One setup, more facesFewer re-fixtures means fewer datum shifts and less stack-up error.
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  Programming is the bottleneckA five-axis machine only pays off if the CAM side keeps up with it.

Five-axis work pays for itself when a part has features on multiple faces, angled holes, or contoured surfaces that are hard to hold in repeated setups. Aerospace brackets, engine housings, impellers, medical instrument bodies, and robot end-effector plates are typical. If the part is a flat plate with holes on one face, a three-axis mill is faster and cheaper.

The deciding question is usually datum control, not geometry alone. If two features on opposite faces have a tight position tolerance to each other, every extra setup adds error. One five-axis setup removes that chain. If the tolerance between faces is loose, extra setups cost nothing in quality.

There is a volume side as well. Five-axis cycle times are often longer per part because the machine is slower to accelerate and the toolpaths are denser. For a 10,000-piece run of a simple turned part, five-axis is the wrong tool. For 50 complex housings, it is often the only way to hold the print.

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  Good fitAngled ports, deep pockets with drafted walls, contoured faces, multi-face datums.
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  Poor fitSingle-face plates, simple shafts, parts already suited to mill-turn.
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  Cost driverSetup count, not machine hourly rate, usually decides the total.

Work envelope decides whether a quote is even possible. Our largest 5-axis travel is 4,000 × 400 × 150 mm, which suits long structural parts such as rails and beams. Medium machines cover 750 × 1,150 × 550 mm and 600 × 600 × 600 mm, the common range for housings and manifolds.

Compact five-axis centers run 500 × 500 × 450 mm and 500 × 310 × 200 mm. These are the machines for small medical and electronics parts where rigidity and thermal stability matter more than size. A Ø400 mm rotary table handles round parts and ring-shaped components.

Maximum processing size across the shop is 4,000 mm. If your part is longer than that, it needs to be split or moved to another process. We would rather say that early than quote a part we cannot hold.

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  Long parts4,000 × 400 × 150 mm travel for rails and structural profiles.
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  Mid-size housings750 × 1,150 × 550 mm and 600 × 600 × 600 mm envelopes.
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  Small precision parts500 × 500 × 450 mm and 500 × 310 × 200 mm machines.
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  Rotary workØ400 mm table for round and ring-shaped parts.

Tolerance is only meaningful with a stated inspection method. We hold ±0.005 mm (±0.0002 in) on 5-axis work, with surface finish from Ra 0.2–0.8 μm on fine finishes to Ra 1.6–3.2 μm as-machined. Which one you get depends on the feature, the material, and the tooling, so it is worth agreeing on the drawing before the first cut.

Inspection is 100% before shipment. That covers incoming raw material checks, in-process monitoring, and a final inspection. Reports are available on request. For regulated programs, this documentation is often the difference between a supplier that can ship and one that can only machine.

Aluminium 6061-T6 and 7075, stainless 304 and 17-4PH, titanium TC4, and Inconel all behave differently on a five-axis machine. Titanium and Inconel push tool wear and heat, so we slow the toolpaths and expect longer cycle times. Quote comparisons that ignore material usually miss this.

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  Tolerance±0.005 mm (±0.0002 in) on five-axis features.
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  Finish rangeRa 0.2–0.8 μm fine, Ra 0.8–1.6 μm high, Ra 1.6–3.2 μm as-machined.
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  InspectionRaw material, in-process, and final checks; reports on request.
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  Hard materialsTitanium and Inconel need slower feeds and longer cycle times.

A 5-axis quote needs the 3D model, the 2D drawing with datums and tolerances, material, finish, and quantity. Send those and you get a quotation plus a free DFM analysis within 12 hours. The DFM note often flags features that would be cheaper on a four-axis machine or a mill-turn center.

Production can start within 24 hours of drawing release, and parts ship in 3–5 days for typical work. Historical late-delivery probability is below 2%. Those numbers assume the drawing is frozen; engineering changes reset the clock.

There is no minimum order quantity. We run from one prototype to 10,000+ part runs on the same floor. Uploads are secure and confidential, and an NDA is available on request. For automotive and medical programs, the NDA usually comes before the drawings.

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  Quote package3D model, 2D drawing, material, finish, quantity.
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  Response timeQuotation and free DFM analysis within 12 hours.
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  Order sizeOne prototype to 10,000+ parts, no minimum order quantity.
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  ConfidentialitySecure uploads and NDA available on request.