Turned parts for high-volume runs and one-off prototypes. Diameters from a few millimeters up to Ø400 mm, tolerances to ±0.005 mm, and 100% inspection before the box leaves the floor.
Small turned parts fail in ways that are easy to miss on a drawing review. These are the ones we see most.
A 4 mm diameter shaft with a 6:1 length-to-diameter ratio deflects under cutting force. If the shop turns it between centers without a steady rest, runout climbs past 0.02 mm and the bearing seat no longer presses cleanly.
A rolled-over edge on a thread relief or cross-hole cuts the O-ring on assembly. Hand deburring is not repeatable, so the leak shows up on the test bench, not on the incoming inspection report.
A part weighing 4 g can start from 12 mm bar stock and machine 90% of it into chips. If the shop does not quote near-net bar or a cold-headed blank, the material line alone can double the piece price at 10,000 parts.
Turning, then milling a flat, then tapping a cross-hole, then sending out for plating. Every handoff adds a queue. A three-week promise quietly becomes six, and the assembly line waits on a part the size of a fingernail.
Two setups that cover most turned-part geometry, plus the metrology to prove it.
Most turned parts are not pure revolutions. A flat, a cross-hole, an axial slot or a hex all need a second operation unless the machine can index the tool around the part. Our 16 mill-turn centers do that indexing in the same spindle, so the cross feature and the turned diameter share one datum.
That matters for concentricity. When a flat is milled in a separate fixture, the operator has to re-chuck on a finished diameter and the runout budget gets split in two. One setup keeps the position error from stacking.
A turned part is usually a fraction of the assembly cost, but it can stop the whole line. We check raw material certificates on receipt, monitor critical diameters during the run, and inspect 100% of parts before shipment. Reports go out on request.
For a bearing seat or a sealing surface, that means the number on the inspection sheet is the number the customer's incoming inspection will see. If a dimension is drifting, we catch it while the bar is still in the machine, not after 5,000 pieces are in a box.
Not every small part belongs on a lathe. This is the rough split we use when quoting.
| Part Characteristic | Turned from Bar | Better Served Elsewhere |
|---|---|---|
| Rotational symmetry | Best fit, one or two setups | Milled from plate if geometry is mostly prismatic |
| Feature count | Cross-holes and flats in one setup | Many deep pockets favor 3-axis milling |
| Annual volume | 1 piece to 10,000+ runs | Very high volume may justify die casting |
| Wall thickness | Uniform walls hold well | Thin, non-round walls risk chatter |
| Surface finish | Ra 0.2–0.8 μm on sealing faces | As-machined Ra 1.6–3.2 μm is often enough |
| Material | Brass, stainless, 17-4PH, titanium | Sheet metal for flat brackets under 3 mm |
Turning is one operation. These are the ones that usually sit next to it.
3-axis, 4-axis and simultaneous 5-axis milling plus turning, all quoted from the same drawing package. Cross-features and turned diameters share one datum.
One-off and low-volume parts so the design can be tested before tooling or a production run is committed. No minimum order quantity applies.
Anodizing, electroless nickel, zinc and black oxide, plus bead blasting, tumbling and polishing. Laser marking is available down to 1.5 mm character height.
For housings and brackets where a turned part is not the right answer and volume supports a tool. We will say so if turning is cheaper.
Flat brackets, covers and enclosures that pair with turned parts in the same assembly, produced under one quality system.
Jigs, fixtures and prototype geometry that would be wasteful to machine. Useful when a form needs to be checked in the hand first.
Numbers we can commit to today. Anything outside this range gets a straight answer.
| Item | Capability |
|---|---|
| Maximum processing size | 4,000 mm |
| Rotary table | Ø400 mm |
| Achievable tolerance | ±0.005 mm (±0.0002 in) |
| Fine finish | Ra 0.2–0.8 μm |
| Standard finish | Ra 1.6–3.2 μm |
| Order quantity | No MOQ, one piece to 10,000+ |
| Quote turnaround | 12 hours, with free DFM analysis |
| Production start | Within 24 hours of approval |
Fifteen years of turning, three plants and a quality system built for regulated industries.
Fifteen years of production turning, with three wholly-owned plants and 7,600 m² of floor space in Dongguan and Singapore.
Five microns on critical diameters, bores and shoulder faces. That is ±0.0002 in for drawings written in inches.
Sixteen mill-turn centers handle cross-drilling, flats and slots without a second chucking, which keeps concentricity on one datum.
Large travel covers 4,000 × 400 × 150 mm, with 750 × 1,150 × 550 mm and 600 × 600 × 600 mm cells for mid-size work.
Send a STEP file and a drawing. You get a quotation and a free DFM analysis within 12 hours, and production can start within 24.
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022 cover industrial, automotive, medical and information security requirements.
Shafts and fittings that hold concentricity through a press fit and survive vibration.
Small stainless components with burr-free edges and traceable material certificates.
Pins, bushings and gear blanks where one extra setup would split the runout budget.
Replacement and new-build parts from one piece up to 10,000-piece runs, no tooling required.
We work from parts a few millimeters across up to a maximum processing size of 4,000 mm, with a Ø400 mm rotary table for indexed work. Large travel covers 4,000 × 400 × 150 mm, and mid-size cells cover 750 × 1,150 × 550 mm and 600 × 600 × 600 mm.
If your part falls outside that envelope, we will tell you at the quoting stage rather than after the order.
Brass C36000 and stainless 303 are the most common because they machine cleanly and hold tight tolerances at high feed rates. We also run 304, 316, 316L, 17-4PH, 4140, titanium TC4 (Ti-6Al-4V), beryllium copper and engineering plastics such as POM and PEEK.
Material choice usually follows the corrosion and strength requirement, not the machinability. Tell us the environment and we will suggest the grade.
±0.005 mm, equivalent to ±0.0002 in. That is achievable on critical diameters, bores and shoulder faces, not as a blanket tolerance over every dimension on the print.
For a bearing seat or a sealing surface, put the tight tolerance on the dimensions that need it. Applying ±0.005 mm everywhere raises cost without improving function.
No. We run from one prototype to 10,000+ part runs. Setup cost is the same either way, so the piece price drops as volume rises, but there is no gate you have to clear to place an order.
Prototype quantities ship in the same 3–5 day window as production parts.
Long, small-diameter parts need support. We use a steady rest or follow the part with the sub-spindle, and take lighter passes at reduced feed to limit radial force.
If the length-to-diameter ratio is extreme, we will say so during DFM review and propose a geometry change or a different process. A part that flexes on the machine will not measure straight on the bench.
As-machined parts come off at Ra 1.6–3.2 μm. Where a sealing or sliding surface needs more, we hold Ra 0.8–1.6 μm as a standard high finish or Ra 0.2–0.8 μm for fine work.
Secondary finishes include anodizing, electroless nickel, zinc, black oxide, bead blasting, tumbling and polishing. Laser marking is available down to 1.5 mm character height.
Quotation and free DFM analysis come back within 12 hours of receiving a drawing and STEP file. Production can start within 24 hours of approval, and parts ship in 3–5 days.
Historical late-delivery probability is below 2%. If a date is at risk, we flag it before the run starts rather than after.
Yes. Uploads are secure and confidential, and an NDA is available on request before any file changes hands. We also hold ISO 27001:2022 for information security.
If your process requires a specific NDA template, send it and we will review it rather than asking you to accept ours.
Upload a STEP file and a 2D drawing. You get a price, a free DFM review and a straight answer on whether turning is the right process for the part.
12-hour quote100% inspectionNo MOQNDA on request
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Upload your 3D model or 2D drawing and get a quotation with a free DFM analysis. Maximum processing size 4,000 mm.
CNC Metals 13 grades
CNC Plastics 10 grades
Machines & processes 12 options
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