REACH Certified CNC Turning China: What It Really Covers

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  What REACH Certified CNC Turning China Actually Means
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  Where SVHC Risk Hides in a Turned Part
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  Turning Geometries and Tolerances That Fit This Work
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  Why Buyers Source Turned Parts from China
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  How Compliance Is Held Through the Shop Floor
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  What Compliance Costs You in Practice
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  Five Steps to Release a Compliant Turning Order
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  Comparing Supplier Types for REACH Turned Parts

REACH stands for Registration, Evaluation, Authorisation and Restriction of Chemicals. It is EU Regulation 1907/2006, and it controls chemical substances in products placed on the European market, not the machining process itself. There is no certificate that says "this lathe is REACH compliant."

What a buyer really needs is evidence about substances. The SVHC candidate list sets a threshold of 0.1% by weight per article for most listed substances. If a part exceeds it, you owe your customer a declaration under Article 33. Heavy metals and their compounds sit on that list, which is why brass, plating baths and coolant residues matter.

So when a supplier advertises REACH certified CNC turning China, read it as shorthand. The claim should resolve to three things: material declarations from the mill, chemistry data for every fluid in the process, and a finished-part statement. If a supplier cannot name those three documents, the word certified is marketing.

One more boundary. REACH governs substances in the article you ship. It does not cover electrical safety, food contact or medical device approval. Those are separate regulations, and a turning shop cannot substitute one for the other.

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  Article 33Duty to inform customers above 0.1% w/w SVHC in an article.
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  SVHC listUpdated twice a year by ECHA; always ask for the revision date.
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  0.1% thresholdApplies per article, not per homogeneous material.

Start with the alloy. Free-machining brass, such as C36000, contains lead to improve chip breaking, often in the 2-3% range. Lead metal is on the candidate list. If your part goes into the EU, a leaded brass shaft can trigger a declaration even though nothing was added at the machine.

Coolants and oils are the second channel. A water-miscible cutting fluid may contain boric acid, some amine borates or specific biocides. Residue left on a part after turning is small, but it is surface chemistry you cannot see, and a cleaning step is what removes it. Ask which cleaner is used and whether it is alkaline or solvent based.

Coatings are the third. Nickel plating baths can carry lead or cadmium as stabilizers. Chromium-free passivation options exist and are worth specifying when the part touches skin or sits in a wet environment. Anodizing is generally low risk, but the dyes are not automatically clear.

The pattern is consistent. Risk enters through additives, not through the turning operation. That is why material traceability and process chemistry control decide compliance, not spindle accuracy.

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  Leaded brassC36000 can exceed 0.1% lead; C27400 and C28000 are lower-lead options.
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  Cutting fluidConfirm boron and biocide content with the fluid supplier.
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  PlatingNickel and zinc baths vary by stabilizer package.

CNC turning rotates the workpiece against a stationary tool. It suits axially symmetric geometry: shafts, pins, bushings, flanges, connector shells, valve bodies and threaded inserts. Live tooling adds cross-drilling, tapping and light milling in the same setup, which reduces handling and re-chucking error.

GreatLight holds ±0.005 mm (±0.0002 in) on diameter and roundness for turned features, with surface finish from Ra 0.2–0.8 μm on fine-turned or burnished surfaces and Ra 0.8–1.6 μm on standard turned features. As-machined surfaces land at Ra 1.6–3.2 μm.

The work envelope matters for planning. Our largest turning and mill-turn travel reaches 4,000 × 400 × 150 mm, mid-size platforms cover 750 × 1,150 × 550 mm and 600 × 600 × 600 mm, and compact cells cover 500 × 500 × 450 mm and 500 × 310 × 200 mm. A Ø400 mm rotary table supports larger round parts.

Material choice drives the cutting strategy more than the drawing does. Aluminum 6061 and 7075 run fast with high rake angles. Stainless 316 and 17-4PH work-harden, so keep feed per revolution up and never dwell. PEEK and POM need sharp tools and controlled coolant to avoid dimensional drift after cooling.

Parts that do not fit turning well: thin-wall shells below about 0.5 mm wall with tight roundness, deep non-round pockets, and features that depend on a single datum across five faces. Those usually go to 5-axis milling or mill-turn instead.

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  Good fitShafts, bushings, pins, shells, threaded fittings, flanges.
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  Poor fitVery thin walls, non-round deep pockets, 5-face datum chains.
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  Live toolingCross-holes and flats without a second setup.

China holds a large share of global contract machining capacity, and turning is one of the deepest pools. For a European buyer, the calculation is no longer only unit price. It is landed cost, which includes compliance paperwork, freight reliability, rework risk and the cost of a late line stop.

Compliance overhead is the part people underestimate. A mill certificate in Chinese, a coolant SDS with no English version, and a plating line with no SVHC statement add engineering hours on your side. A supplier that already keeps those documents in English and ties them to the part number removes that work.

Proximity still wins for some cases. If your design is unproven and you need a physical part next day for a fit check, a local shop is faster. Once the drawing is frozen, moving the volume to a plant that controls material and chemistry pays back.

GreatLight runs three wholly-owned plants, 7,600 m² of floor space and 150 technicians, with 127 high-precision CNC machines including 16 simultaneous 5-axis centers, 16 mill-turn centers and 12 four-axis mills. That mix lets a turned part with milled features stay in one plant.

Certification scope matters too. We hold ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022. None of these is REACH. They are the quality and security layer that makes a documented REACH workflow credible.

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  Document languageEnglish mill certs and SDS files save review time.
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  Single plantTurn, mill, finish and inspect without moving the part.
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  Audit trailBatch-level traceability from ingot to shipment.

Compliance fails when it lives in a folder. We tie it to the traveler. Each turned order starts with an incoming material check against the mill certificate, including grade, heat number and country of origin. If the alloy is restricted for the destination market, the job stops before the first cut.

Every coolant, oil and cleaner in the process has a current safety data sheet on file, reviewed against the SVHC list revision in force. When ECHA updates the list, we re-check the fluids we use rather than waiting for a customer to ask.

In-process monitoring covers diameter, roundness and surface finish at defined intervals. Final inspection runs on 100% of parts before shipment, and reports are available on request. Our recorded qualification rate is 99.99%.

Finishing is the last gate. Anodizing, passivation and plating are specified by process name and by bath chemistry. If a bath cannot be documented, it is not used on EU-bound parts. Laser marking for traceability keeps a minimum character height of 1.5 mm so the code stays readable after coating.

On timing, we return a quotation and free DFM analysis within 12 hours, production can start within 24 hours, and parts typically ship in 3–5 days. Historical late-delivery probability sits below 2%.

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  IncomingMill certificate checked against heat number before cutting.
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  In processDefined intervals for diameter, roundness and finish.
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  Outgoing100% inspection, reports on request.

Lower-lead brass machines differently. C27400 and C28000 tend to produce longer chips and need adjusted feed and speed, so cycle time can rise by a small margin compared with C36000. On a high-volume fitting, that shows up in unit price.

Cleaning adds a step. Aqueous alkaline cleaning with a rinse and dry is common and adds handling, but it removes coolant residue that would otherwise sit on the surface. For parts with blind holes, confirm the cleaning reaches inside, or specify a second orientation.

Documentation is not free either, but it is a one-time cost per part family. Once the mill certificate, fluid list and SVHC statement are tied to a part number, repeat orders reuse them. That is why the first article on a new turned part carries more engineering hours than the tenth.

The tradeoff to avoid is paying for inspection you do not need. A non-critical bracket does not require a full SVHC declaration. A fluid connector or a skin-contact housing does. Match the evidence level to the market and the application.

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  Cycle timeLow-lead brass may run slower than C36000.
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  CleaningBlind holes and threads need verified rinse access.
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  ReuseDocumentation amortizes across repeat orders.