CNC turning cells
CNC lathes handle shafts, pins and bushings with controlled cutting parameters for stainless grades.
Solution · CNC Turning
Stainless Steel Turned Parts with Verified Material Traceability
Stainless turned parts fail sourcing reviews for two reasons: unclear material provenance and tolerance drift between batches. Our turning workflow answers both — grade and heat-number traceability agreed at drawing review, first-article inspection before batch release, and the same inspection plan on every repeat order.
Send your stainless drawingsIT6–IT7 turned tolerances with SPC data
Laser cutting centre at our Zhuhai facility — stainless sheet preparation feeds the turning and machining lines.
Why stainless turned parts go wrong in sourcing
Material provenance you cannot verify
Without mill certificates linked to heat numbers, a "stainless" part is only a claim — and incoming inspection or customer audits will eventually ask for proof.
Corrosion requirements left implicit
Grade, surface finish and passivation expectations that stay unspoken at RFQ stage surface as rejected assemblies months later.
Tolerance drift across batches
Small stainless runs from rotating shops change setup every time, so bores and fits need re-measurement before every assembly.
Grade traceability and inspection discipline, built into the route
Our turning workflow starts with a drawing review where grade, critical tolerances and surface requirements are written into the inspection plan. Material is sourced with mill certificates linked to heat numbers, first articles confirm critical diameters, and batch production runs under the same plan so repeat orders behave like the approved sample.
What your purchasing team gets
- Material certificates linked to heat numbers, available with stainless batches on request.
- First-article inspection on critical diameters before batch release.
- One inspection plan per project, reused across repeat orders.
Grade-aware tooling
Tool selection and feeds are planned against work-hardening behavior rather than generic steel parameters.
Dimensional verification
IT6–IT7 class tolerances verified with first-article inspection and in-process checks on critical features.
Finishing coordination
Surface and passivation requirements are agreed at drawing review and carried through to the inspection plan.
Compare stainless grades before you specify
Select a grade to see its profile, machining behavior and typical uses. This is a general engineering reference to help you frame the RFQ — grade availability and certificates are confirmed with our team.
Grade profile
General-purpose austenitic stainless steel with good corrosion resistance and formability.
Machining behavior
Machines reliably with sharp tooling and controlled feeds; work-hardens if cut too slowly.
Typical uses
Enclosure fittings, food-equipment frames and general machinery parts.
Grade notes are general engineering references, not material certificates. Confirm grade availability, mill certificates and heat-treatment scope with our team before ordering.
Typical stainless turned-part scenarios
Typical application examples based on our documented workflow. Buyer roles are anonymized; outcomes depend on project specifics.
Pump and valve distributor supplying maintenance customers
- What was produced
- Stainless turned shafts and bushings for pump assemblies.
- Before
- Mixed suppliers delivered parts without material certificates, so every lot needed manual verification.
- After
- Each batch supplied with material certificates linked to heat numbers.
- Data source
- Material certificate records and QC photo packs on file.
Food machinery manufacturer building hygienic equipment
- What was produced
- 316L turned fittings for washdown equipment.
- Before
- Surface-finish inconsistencies between suppliers caused rejected assemblies.
- After
- First-article approval plus in-process checks locked the finish before batch release.
- Data source
- FAI reports and sample approval records on file.
EPC buyer procuring instrument fittings
- What was produced
- Small-batch stainless turned components with tight bore tolerances.
- Before
- Tolerance drift across batches forced incoming re-inspection of every lot.
- After
- Inspection plan agreed at drawing review; incoming checks reduced to sampling.
- Data source
- Drawing review records and inspection plans on file.
Buyer feedback on stainless sourcing
Buyer feedback examples framed around our standard documentation and workflow evidence; results reference checkable records.
“Material certificates now match heat numbers on every batch, so our incoming team no longer holds shipments.”
Pump distributor sourcing shafts through an annual supplier review
Verifiable result: 12 months of continuous cooperation with certificate-supplied batches
Source type: Material certificate records on file
“The first-article sample matched the production batch, and we stopped re-measuring every delivery.”
Food machinery manufacturer procuring 316L fittings by referral
Verifiable result: First-article approval reused across 3 repeat orders
Source type: FAI report and sample approval records on file
“The inspection plan came back with the quotation, which made our tender documentation straightforward.”
EPC buyer adding turned parts to an existing frame order
Verifiable result: Inspection plan agreed before production on the referenced order
Source type: Quotation file and drawing review record
Certifications behind the quality system
Certifications below are held by Zhuhai ChunTian Machine Technology Co.,Ltd. Scope and validity details are available with the certificate documents on request.
Company strength
Established
Operating since 2009 with more than 15 years in precision sheet metal and CNC machining.
Factory scale
300–1,000 staff and an annual revenue of USD 30–150 million, running laser cutting, punching, bending, welding and machining under one roof.
Engineering support
Engineering team turns drawings into quote-ready technical files with tolerance risk notes, inspection plans and DFM recommendations.
Core equipment
TRUMPF TruMatic 6000 combined laser-punching line, Amada turret punching and a dozen welding robots covering laser, arc, TIG/MIG and spot welding.
Buyer relationships
Long-term supply relationships with machinery importers, distributors and EPC buyers.
Export markets
Serving machinery importers, distributors and EPC buyers worldwide.
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View serviceStainless turned parts FAQ
Which stainless grades can you machine?
Common austenitic grades such as 304 and 316L, plus precipitation-hardening and duplex grades on request. Grade availability and mill certificates are confirmed with the quotation.
Do you supply material certificates?
Material certificates linked to heat numbers can accompany stainless batches — request them with your RFQ.
What tolerances can you hold on turned parts?
Every drawing goes through a tolerance risk assessment first. Critical diameters are confirmed with first-article inspection before batch release.
Can you handle small batches of stainless parts?
Yes — the same production line and inspection plan serve first articles, pilot builds and early production batches.
How are corrosion requirements verified?
Grade selection and surface finish requirements are agreed at drawing review. For certificate-backed corrosion requirements, request material certificates and inspection records with the order.
Request a quote for this solution
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