Get custom CNC-turned metal and plastic parts for prototypes, low-volume runs, and repeat production.
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CNC turning is suited to components with rotational geometry — controlled diameters, bores, shoulders, grooves, threads, tapers, and concentric features — from shafts and bushings to fittings and rotational machine components.
Shafts, pins, bushings, sleeves, spacers, collars, and rings — external diameters, shoulders, tapers, and profiles turned to your print.
Bores and internal diameters, external and internal threads, retaining-ring and relief grooves — reviewed for accessibility, depth, and tolerance.
Flats, cross holes, slots, bolt patterns, and mounting faces added through CNC milling, reviewed as a multi-process project.
Material and finish selections are reviewed according to part geometry, tolerance, function and production requirements.
*Titanium and PEEK are reviewed according to geometry, tolerance and order requirements.
View Materials GuideFinish availability, masking, thread protection and dimensional impact are confirmed during quotation.
Explore Surface FinishesEach project is reviewed against diameter, length, material, workholding, tolerance, and inspection requirements before production begins.
| CNC Department | Approximately 20 CNC machines across ENSI's milling and turning capacity |
| Turning Envelope | Up to Ø400 × 500 mm for suitable projects |
| Materials | Common metals and engineering plastics |
| General Tolerance | ISO 2768-m unless otherwise specified |
| Critical Features | Down to ±0.01 mm where technically suitable and confirmed during review |
| Surface Finish | As-machined by default; secondary finishing coordinated per project |
| Production Volume | One-off prototypes, low-volume orders, and repeat production |
| Inspection | Critical dimensions checked during production and before shipment |
Turning envelope and tightest achievable tolerance are reviewed and confirmed independently for each project — a large-diameter part does not automatically qualify for ±0.01 mm, and a tight-tolerance feature does not require a large part.
Tolerance, concentricity, runout, threads, grooves, material, and inspection requirements should be clearly identified on the drawing before machining begins.
ISO 2768-m applies unless otherwise specified or agreed.
Where multiple diameters, bores, or shoulders must relate to the same axis, identify the functional requirement on the drawing.
Long, slender parts and thin-walled sleeves may need a revised process or additional support to hold tolerance.
Specify thread standard, size, pitch, and class, plus groove width, diameter, and corner radius.
Confirm material and clearly identify mating diameters and the required fit or tolerance on the drawing.
Identify critical diameters, lengths, fits, and any required inspection records during quotation.
Provide both a 3D CAD model and a 2D drawing when the project includes critical tolerances, threads, fits, runout, or inspection notes.
View Tolerance & InspectionFrom drawing review to final delivery, every CNC-turned part follows a controlled production process designed to maintain accuracy, consistency and repeatability.
Start your projectCAD files, materials, quantities, tolerances and finishing requirements are reviewed before production.
The specified stock material is confirmed, prepared and matched to the approved manufacturing plan.
The part is programmed, set up and machined with critical dimensions controlled throughout production.
Dimensions, tolerances, threads and surface requirements are verified against the approved drawing.
Finished parts are cleaned, protected, packed and prepared for secure shipment.
Up to Ø400 × 500 mm for suitable projects. Parts outside this envelope can still be discussed during quotation.
Tolerances down to ±0.01 mm may be supported on suitable critical features after engineering review. Not every dimension on every part can hold this tolerance — general dimensions follow ISO 2768-m unless otherwise specified.
Aluminum, stainless steel, mild and alloy steel, brass, and copper, with titanium available on suitable projects after review — plus engineering plastics including POM/Acetal, ABS, nylon, PC, PMMA, and PTFE, with PEEK available on suitable projects after review.
Yes. Single-piece prototypes, low-volume runs, and repeat production with stable drawings and controlled revisions all run through the same CNC turning process.
Yes. External and internal threads, retaining-ring and relief grooves, and drilled or bored internal features are reviewed against accessibility, depth, and tolerance. Parts that also need flats, cross holes, slots, or bolt patterns can be reviewed for separate CNC milling operations.
STEP or STP files work best for turned parts, along with a PDF or DXF drawing showing critical dimensions, tolerances, threads, and finish requirements. SLDPRT, X_T, and IGES are also accepted. A 2D drawing is needed whenever the project includes critical tolerances, threads, fits, runout, or inspection notes.
Upload your CAD model and technical drawing with material, quantity, diameter, length, tolerances, threads, finish, and inspection requirements. ENSI will review the project and confirm the next manufacturing steps.