# Second-Source Turned Components for Automotive Suppliers – Application Case > 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. https://www.sinbo-machining.com/case/automotive-second-source/ --- ## On This Page - Typical component families - Typical supply parameters - Parameter Quick Reference - Industry scenario: second sourcing with IATF-grade discipline - Typical component families and processes - Workflow: drawing, sample approval and recurring series - Quality and documentation - FAQ - Related Materials · Related Services · Related Case Studies - Planning components like these? # Second-Source Turned Components for Automotive Suppliers 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. Application at a glance ### Typical component families | Bushings / sleeves | Steel + copper, aluminum | Solenoid valve components | Soft-magnetic steel, 303 | HV contact parts | Copper, silver/nickel plated ### Typical supply parameters | Batch range | 1,000–20,000 pcs per family | Certification | IATF 16949 quality system | Documentation | PPAP (level per agreement), 3.1 ## Parameter Quick Reference | Parameter | Specification | Component families | Buchsen / Hülsen (bushings, sleeves); Magnetventil-Komponenten (solenoid valve components); HV-Kontaktteile (HV contact parts); Getrieberad-Rohlinge (gear blanks) | Typical materials | steel + copper, aluminum; soft-magnetic steel, 303; copper + silver/nickel plating; 16MnCr5 | Machining processes | turning; Swiss-type turning; turning + coordinated plating | Typical batch sizes | 1,000–20,000 pcs per family | Default tolerance scheme | IATF 16949 quality system | Material certificates | PPAP (level per agreement), 3.1 | Inspection requirement | first article inspection | Quotation and sample lead time | quotation within 48 hours; first samples in 7–15 days ## Industry scenario: second sourcing with IATF-grade discipline 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. ## Typical component families and processes | 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. ## Workflow: drawing, sample approval and recurring series 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. ## Quality and documentation 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. ## FAQ 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. ### Related Materials · Related Services · Related Case Studies [Related Materials: Steel ](https://www.sinbo-machining.com/products/materials/steel/)[· Copper ](https://www.sinbo-machining.com/products/materials/copper/)[Related Services: Cnc Machining ](https://www.sinbo-machining.com/services/cnc-machining/)[Related Case Studies: Ev Solenoid Valve ](https://www.sinbo-machining.com/case/ev-solenoid-valve/)[· Ev Hvdc Contact Plate ](https://www.sinbo-machining.com/case/ev-hvdc-contact-plate/)This page describes a representative application scenario for the automotive component supply industry, compiled from typical requirements of this vertical. It is not tied to any specific customer or order; series quantities, materials and tolerances are confirmed per drawing for each enquiry. ## Planning components like these? 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. [Get a Quote in 48 Hours ](https://www.sinbo-machining.com/quote/)