Second-source supply for automotive Tier suppliers: bushings, solenoid valve components, HV contact parts and gear blanks. IATF 16949, PPAP documentation, batches 1,000–20,000 pcs.
| Bushings / sleeves | Steel + copper, aluminum |
| Solenoid valve components | Soft-magnetic steel, 303 |
| HV contact parts | Copper, silver/nickel plated |
| Batch range | 1,000–20,000 pcs per family |
| Certification | IATF 16949 quality system |
| Documentation | PPAP (level per agreement), 3.1 |
Automotive Tier suppliers de-risk their chains by qualifying second sources for machined components — bushings, solenoid valve parts, HV contact parts and gear blanks. The entry ticket is IATF 16949 certification and PPAP documentation; the deciding factor is whether the second source can hold the approved process stable across call-offs.
High-voltage components add a materials dimension: copper contact parts with silver or nickel plating for EV powertrain and charging applications, where conductivity and contact resistance are drawing-critical.
| Component (DE / EN) | Typical material | Process | Typical batch |
|---|---|---|---|
| Buchsen / Hülsen (bushings, sleeves) | steel + copper, aluminum | turning | 2,000–20,000 pcs |
| Magnetventil-Komponenten (solenoid valve components) | soft-magnetic steel, 303 | Swiss-type turning | 1,000–10,000 pcs |
| HV-Kontaktteile (HV contact parts) | copper + silver/nickel plating | turning + coordinated plating | 1,000–10,000 pcs |
| Getrieberad-Rohlinge (gear blanks) | 16MnCr5 | turning | 2,000–20,000 pcs |
Plating is coordinated within the process chain; contact-resistance-relevant surfaces are protected through packaging to the plating specification.
The standard flow: drawing review and quotation within 48 hours, first samples in 7–15 days, first article inspection and approval, then series production against the approved reference. Batch sizes follow the table above — from single spare parts to tens of thousands of pieces per order, depending on the component family.
For repeat orders, tooling, program revisions and inspection records are kept on file, so call-offs remain consistent with the approved first article. Engineering changes — material substitutions, tolerance updates, packaging changes — are handled as controlled changes against the same records.
DIN ISO 2768-mK applies as the default tolerance scheme for unspecified dimensions. EN 10204 3.1 inspection certificates are standard for metallic parts, First Article Inspection supports the approval step, and RoHS/REACH declarations are available where required. Surface treatment, cleanliness and packaging requirements are confirmed per drawing.
Are you IATF 16949 certified?
Yes — IATF 16949 is part of our certification portfolio and the basis for automotive second-source qualification.
Which PPAP level can you support?
PPAP documentation is delivered at the level agreed with the customer, typically covering dimensional results, material certificates and process evidence.
How does second-source onboarding work?
Drawing and specification review, sample production, PPAP submission and approval — then series supply against call-offs with reserved tooling and records.
Can you supply HV contact parts for EV applications?
Yes — copper contact components with coordinated silver/nickel plating are an established family in our automotive portfolio.
Send your drawing — Sinbo Precision will review material, tolerance scheme and batch plan and return a quotation within 48 hours. Samples in 7–15 days.
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