REACH Compliance for Flywheel Sourcing: Buyer Checklist
REACH compliance for flywheel sourcing is not a sticker on a carton. It is a controlled trail of material choices, surface treatments, process chemicals, packaging, batch records, and supplier declarations that can be defended when a distributor, OEM customer, or authority asks for evidence. For EU and UK engine programmes, buyers need to know what is in the flywheel body, ring gear, fitted hardware, corrosion protection, labels, VCI materials, and export packaging. They also need proof that those items are checked against REACH (EC) No 1907/2006 and the current SVHC Candidate List. Driventus is an independent aftermarket manufacturer; brand names are referenced for fitment only. From our Taizhou, Zhejiang facility, we manage machining, balancing, and outgoing inspection in-house, which keeps material declarations, batch records, and quality data aligned. Use this guide to decide what to request before PO release, how to test the paperwork, and where MOQ, price, tooling, samples, and custom manufacturing can change compliance risk.
Decision point: is the flywheel itself the risk, or the process around it?
A flywheel is usually a ferrous rotating component, so the base metal is often easier to control than the materials added around it. REACH compliance for flywheel programmes still depends on substance communication, restriction control, and record keeping. Risk can enter through phosphate, paint, e-coat, black oxide, anti-rust oil, VCI film, adhesive labels, marking inks, desiccants, or fitted accessories.
Use these questions before treating the part as low risk:
What base material is used: grey iron, ductile iron, cast steel, forged steel, or machined billet?
Is the grade fixed by drawing, for example HT250, GGG40, 45 steel, 42CrMo, or an approved equivalent?
Do any coatings, oils, VCI films, anti-rust papers, desiccants, labels, or packed accessories contain restricted substances or SVHC above 0.1% w/w in an article?
Does the supplier state SVHC status against the current ECHA Candidate List and show the list date used?
Does the declaration cover the delivered unit, including the flywheel body, ring gear, dowel, pilot bearing if supplied, packed bolts, labels, and packaging?
Can the supplier connect lot number, melt or heat number, machining batch, balancing record, and shipment batch within 24 to 48 hours during an audit?
A useful compliance file supports EU and UK market access, internal supplier audits, and downstream customer declarations. Ask for it before PO release. At that stage, a coating can still be changed, a packaging route can be clarified, and a process step can be documented without disrupting production.
The document pack that separates a usable quote from a loose promise
Apply the same control points to every part number, including OE cross-references where relevant. If these records are missing, the sourcing file is not ready for a customer audit or distributor compliance request.
Check item
What to request
Why it matters
Material declaration
Alloy grade, material standard, melt or heat number, and component BOM
Confirms the flywheel body, ring gear, inserts, dowels, bearings, or packed bolts are defined
REACH statement
Written statement referencing REACH (EC) No 1907/2006 and declaration issue date
Establishes the regulatory basis and currency of the declaration
SVHC status
Candidate List date, article-level status, and whether any SVHC exceeds 0.1% w/w
Verifies whether Article 33 communication duties apply
Surface treatment data
Coating, paint, phosphate, black oxide, oil, VCI, or rust-prevention specification
These layers often create the highest compliance risk
Process evidence
Process flow for casting or forging, machining, heat treatment, cleaning, balancing, coating, and packing
Shows where chemicals can enter or be removed from the finished article
Traceability record
Lot number, inspection report, production batch, balance report, carton label, and shipment batch
Supports investigation if a customer or authority asks for evidence
Packaging declaration
Anti-rust paper, plastic bag, VCI film, desiccant, carton, pallet, and recycled content if relevant
Packaging can also trigger restricted-substance review
Change notification
Written process for material, coating, packaging, chemical, or sub-supplier changes
Prevents silent supplier changes after approval
</tr></thead><tbody> </tbody></table>A strong supplier file links the declaration to the exact part reference. If an OE cross-reference such as OE 06A107065 is part of the fitment list, the declaration should make that connection clear. A generic product-family statement is weaker. For repeat orders, require reconfirmation of REACH and SVHC status at least annually and whenever the Candidate List is updated.
Spec deep-dive: where substances can enter a flywheel programme
Flywheels are manageable when the material and process route are visible. They become harder to defend when a buyer approves only the drawing and ignores the finishing, cleaning, packing, and marking steps.
Material and process points
Base metal: confirm whether the part is grey iron, ductile iron, cast steel, forged steel, or billet steel, and keep the grade in the commercial file
Material controls: record the standard, melt or heat number, hardness range, and whether recycled charge material is controlled by the foundry or mill
Heat treatment: record normalising, quenching, tempering, stress relief, induction hardening, or ring gear treatment where it affects final part condition
Machining fluids: verify that cutting oils, cleaners, and rust preventatives are controlled, rinsed, dried, or intentionally retained before shipment
Coatings: ask for coating chemistry, target film thickness where relevant, cure process, corrosion target, and supplier declaration for the finish system
Ring gear and added hardware: check whether the gear is shrink-fitted, welded, riveted, bonded, or mechanically fixed, and whether adhesive or flux is used
Balancing: define the balance grade or residual unbalance target; many passenger-car flywheels use a part-specific gram-millimetre limit, not a visual check
Marking method: laser marking is usually easier to document than ink, paint marks, or adhesive labels
Packaging: review paper coatings, plastic bags, desiccants, VCI materials, anti-rust papers, pallet treatment, and carton labels if they are part of the delivered unit
For EU and UK buyers, common ferrous material is rarely the hardest issue. The greater risk sits in additions and treatments that were not captured in the RFQ. Tie the material declaration to the final process route, not only to the raw casting, forging, or steel stock.
Validation sequence: test the declaration before you trust it
A declaration is only useful if the evidence behind it matches the part being purchased. Procurement and quality teams should compare the supplier statement with the records that prove it.
1. Check the material certificate or mill certificate for grade, standard, melt or heat number, and chemical composition. 2. Compare it with the process flow: casting or forging, heat treatment, rough machining, finish machining, ring gear fitting, balancing, cleaning, coating, rust prevention, inspection, and packing. 3. Match incoming and outgoing inspection records to the batch or lot number shown on the carton or pallet label. 4. Review SDS or technical data for any coating, oil, rust preventive, cleaning agent, VCI material, desiccant, adhesive, ink, or packaging treatment. 5. Confirm the written SVHC statement under REACH (EC) No 1907/2006, including the Candidate List date used. 6. Read the change-control procedure for material, coating, packaging, chemical, process, tooling, and sub-supplier changes.
Dimensional validation needs actual measured values, not only pass/fail marks. Common controls include crank bore diameter, bolt-hole PCD, dowel position, friction-face runout, ring gear concentricity, mounting-face flatness, overall height, mass, and balance. Typical drawing tolerances may sit around +/-0.02 to +/-0.05 mm for critical machined diameters, 0.03 to 0.08 mm for face runout, and part-specific limits for residual unbalance, but the approved drawing governs. Driventus works under IATF 16949:2016 and ISO 9001:2015, so material control and dimensional inspection sit inside a formal quality system. See our quality system for the framework we use on production parts.
RFQ wording that prevents compliance disputes later
The RFQ is where REACH compliance for flywheel sourcing becomes practical. If the request is vague, the quotation may exclude declarations, coating data, packaging information, inspection records, or annual updates. That creates conflict after samples are approved.
Include these lines in the request:
Part number and OE reference, if available
Annual volume, forecast split, target MOQ, first order quantity, and delivery market
Required material grade, material standard, hardness range, and heat treatment condition
Drawing revision, 2D/3D data, sample part availability, and target weight or inertia if specified
Surface finish, corrosion protection, storage-life requirement, and whether VCI packaging is permitted
Declaration required: REACH, SVHC status, packaging statement, and any customer-specific restricted-substance list
Inspection data required: bore, bolt pattern, dowel position, runout, face flatness, height, mass, and balance standard
Label and traceability requirements by pallet, carton, and piece
Approved drawing revision, PPAP or sample approval route, golden sample policy, and change-control rules
MOQ and price follow the production route. Existing catalogue items can often support lower trial quantities. A new casting, forging, ring gear, or special coating usually needs a higher MOQ because tooling, fixtures, setup, chemical controls, and first-article inspection have to be absorbed. Ask for pricing at two or three breaks, such as 100, 300, and 500 pieces, and separate unit price, tooling cost, sample cost, packaging cost, and documentation cost.
Typical timing is 3 to 7 working days for document review, 15 to 30 days for samples when tooling exists, 35 to 60 days when new tooling or ring gear sourcing is required, and 30 to 45 days for production after approval, subject to part complexity and order quantity.
If the application needs a non-standard ring gear, a specific inertia target, a revised coating, a tighter runout requirement, or a special anti-rust process, use custom manufacturing to lock the specification before production starts. That is usually cheaper than rework after first article approval.
Failure modes: four ways a compliant-looking order breaks down
Most sourcing problems appear in four places. Each has a purchasing control.
Failure point
Typical cause
Procurement fix
Missing SVHC statement
Supplier sent a generic certificate, outdated declaration, or family-level statement
Request a part-specific declaration with the Candidate List date and article scope
Coating not covered
Paint, phosphate, oil, blackening, or VCI material was added after quotation
Require process disclosure, treatment data, and SDS/TDS references in the RFQ
Traceability gap
Batch label does not match the inspection record, balance record, invoice, or packing list
Align lot coding across the part label, carton, inspection report, and shipping document
Silent change
Supplier changes coating, cleaner, packaging, chemical brand, ring gear source, or sub-supplier
Add formal change-notification terms to the purchase order and supplier agreement
</tr></thead><tbody> </tbody></table>Some failures are commercial, not technical. A buyer may accept a low unit price without noticing that declarations, special packaging, first-article inspection, or annual compliance updates are excluded. Another common issue is an MOQ that does not fit the requested process. If a custom coating or new casting route is required, the supplier may quote an attractive sample price and push the real cost into production later.
Ask for the cost structure before approval. Confirm whether the price includes REACH/SVHC documentation, material certificates, dimensional reports, balance reports, and export packing.
A flywheel can pass dimensional inspection and still fail a customer audit if the paper trail is weak. Compliance language should sit beside the drawing, material grade, inspection standard, Incoterms, MOQ, and change-control terms, not in a separate email chain.
Multi-market scenario: one controlled file, several destination rules
A strong control set can support several sales regions and customer types. The goal is not to create a different technical file for every shipment. The goal is one controlled specification, with local paperwork added where needed.
EU and UK: keep the REACH file current, store the latest ECHA Candidate List reference date used for the declaration, and capture any Article 33 communication if an SVHC exceeds 0.1% w/w in an article
US and Canada: maintain product composition records, SDS/TDS references, and traceability files for customer, distributor, and downstream compliance requests
Australia and Brazil: keep the same declaration package, then add local import, customs, labelling, or customer-specific paperwork where required
All regions: align part identification, carton labels, invoice descriptions, HS code descriptions, and OE cross-references so they match the declaration file
Audit control: retain declarations, inspection reports, material certificates, and shipment records for the customer-required period, commonly 5 to 10 years in automotive supply chains
Driventus exports to more than 60 countries, so we treat documentation as part of the supplied product. That matters for aftermarket distributors, OEM and Tier-1 buyers, and multi-location repair chains that need repeatable records across warehouses and customer systems. For multi-market programmes, approve one controlled specification, one packaging route, and one declaration pack per part number, then manage local forms as an add-on.
Pre-PO Q&A checklist for the buyer and supplier
Use these questions before placing a PO:
Are the flywheel reference, drawing revision, and OE cross-reference correct?
Is the supplier REACH declaration current, with issue date and Candidate List date?
Is SVHC status checked against the latest ECHA Candidate List and stated at article level?
Are base material, heat treatment, coating, cleaning chemistry, rust protection, ring gear, and supplied hardware disclosed?
Are critical tolerances agreed, including bore, bolt pattern, dowel position, runout, flatness, height, mass, and balance?
Will the first batch or production sample include an inspection report with actual measured values?
Are MOQ, price breaks, tooling cost, sample cost, documentation scope, and lead time confirmed in writing?
Do purchase terms require change notification for material, coating, packaging, chemical, tooling, process, and sub-supplier changes?
Are packaging and label requirements agreed before production, including VCI, desiccant, carton strength, palletisation, and storage-life target?
Does lot traceability align across the part, carton, invoice, packing list, balance record, and inspection record?
For part families already in our catalog, buyers can match the required reference, compare technical options, and request supporting documentation in one workflow. If the application sits within engine components more broadly, see engine components for related sourcing families.
Frequently asked questions
REACH does not use one universal certificate format. Buyers usually need a written declaration, SVHC status, Candidate List date, and supporting material records tied to the exact part number and batch.
It should identify the part, confirm the regulation basis, state SVHC status, and cover the base metal, ring gear, coatings, oils, rust-prevention materials, packaging, labels, and any supplied accessories.
Yes. The coating must be documented and reviewed for restricted substances. The compliance file should name the coating system, reference the relevant SDS or technical data, and show how it is controlled in production.
Low MOQ is easier when the flywheel is an existing controlled part. New tooling, custom coatings, special packaging, or tighter inspection usually increase MOQ and lead time because samples, chemical approvals, and first-article records must be completed before production.
Send the part number, annual volume, OE reference if available, target market, material or drawing requirements, and required declaration set through our contact page. We will align the technical and documentation package before quotation.
For a flywheel compliance file, drawing review, or part-specific quotation, send your requirements, target MOQ, delivery market, and required documents; we will reply with the next steps: [request a quote](/contact.html).
