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CNC Machining Services
Machining for oversized, long, and heavy components — from large plates and machine bases to shafts, rings, frames, and complex multi-face parts. With gantry milling up to 2,500 mm in travel, large-format milling, VTL turning, and large 5-axis machining, we plan the complete process from DFM and fixturing to inspection and global delivery.
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Maximum part size is determined by machine travel, load capacity, part geometry, and fixturing requirements rather than a single fixed limit. Parts beyond these standard capacities are reviewed individually based on the drawing.
| Process | Machining Capacity | Note |
|---|---|---|
| Gantry / large-format milling | Up to 2,500 × 1,500 × 850 mm | Suitable for large parts requiring single-setup machining. |
| Horizontal boring | Up to 1,300 × 800 × 600 mm | Suitable for deep bores, large flange faces, and heavy components. |
| Vertical turning (VTL) | Up to Ø1,100 × 3,000 mm | Suitable for large-diameter rotational parts such as flanges, rings, and housings. |
| 5-axis milling | Up to 750 × 600 × 600 mm | One-setup machining for criticalfl sealing surfaces. |
| Surface grinding | Up to 3,000 × 1,800 × 700 mm | For finishing large surfaces where flatness is critical. |
Large parts require a different machining strategy, planned before cutting through DFM review, fixturing, and process routing. The route depends on the geometry: rotationally symmetric parts may be turned only, while large plates and frames are typically milled on gantry machines, with boring added for deep or precision features. Grinding is used only when tighter tolerances or flatness requirements demand it.
Parts are machined and measured at a consistent temperature, and long dimensions are checked under the same conditions they were cut in.
Heavy, unbalanced parts need rigid support so their own weight does not spring them out of true. Support points are planned with the cutting sequence, not improvised at the machine.
Rough to relieve stock, then semi-finish and finish to manage stress and heat. Cast and welded blanks get stress relief before final cuts.
Tool and structural deflection
Long-reach cuts flex both tool and structure. Stiff tooling and controlled removal rates keep deflection inside the tolerance being held.
Every re-clamp risks shifting feature relationships. When multiple setups are required, datums are re-established from machined surfaces, not raw stock.
On-machine probes check critical dimensions without unclamping, catching drift while the part is still set.
We check critical features during machining where possible, then run final inspection matched to the drawing requirements, part geometry, and inspection scope.
| Inspection Requirement | Method |
|---|---|
| Critical features during machining | On-machine probing |
| Dimensions within the CMM measuring volume | CMM (up to 1,500 × 800 × 600 mm) |
| Large parts requiring additional dimensional checks | CMM, calibrated granite plate (1,500 × 900 mm), and other gauges as required |
| Material traceability | Material test report (MTR), on request |
| Casting / weldment or customer-specified requirements | NDT, when specified or required |
Material grade matters, but the starting form of the workpiece often shapes the machining plan first. Plate and bar stock, castings, and weldments each require different approaches to workholding, stock removal, and finish machining.
Large parts ship differently from small ones, so packaging and freight are assessed as part of the quote — not after the part is finished.
The two examples below are moderate in size, chosen to show the kind of challenges we solve on large parts: multi-face alignment, long-distance feature spacing, sealing-surface accuracy, setup reduction, and datum control.
