CNC Machining & Injection Molding — DFM/Moldflow Support, CMM Inspection, Prototype to Production Solutions.
Pre-order FAQ Hub
Clear answers on pricing, tolerances, quality documents, delivery, and IP protection — written for engineers and procurement teams.
Fast, verifiable signals that reduce risk for procurement & engineering—quality system, inspection, confidentiality, and delivery reliability.
Start where you are in the buying workflow—RFQ, ordering, lead time, quality, shipping, or confidentiality.
What we need to quote accurately, what drives price, and how to speed up turnaround.
From PO to production: approvals, engineering questions, changes, and what happens after you place an order.
How we run programs—process control, delivery discipline, and what reduces schedule risk for repeat orders.
Quick answers on inspection expectations and common quality documentation (CMM, FAI, PPAP).
Protection for transit, labeling requirements, and how we keep parts safe and organized on arrival.
Shipping options, delivery timeline expectations, and what info you’ll receive for tracking.
How data is handled and protected. (Tip: add a dedicated NDA/IP page for manufacturing files.)
A quick directory of key pages for reference.
Each answer starts with a direct 40–60 word block for Featured Snippets, followed by a short practical note and a “Learn more →” link.
Quote inputs, pricing logic, and how to reduce cost without compromising CTQs.
Pricing is based on material, machining time, tolerances, surface finish, quantity, and inspection requirements. Complex CTQs, tight tolerances, or special quality documents can increase cost by adding setup, verification steps, and reporting.
Prototypes typically prioritize speed and setup, while higher volumes benefit from process optimization. Sharing target function, non-critical dimensions, and DFM flexibility often reduces cost.
Inspection deliverables, CTQ verification, and documentation for programs.
We provide inspection reports such as CMM measurement results, First Article Inspection (FAI), and PPAP documentation upon request, helping verify dimensional accuracy and compliance with your critical-to-quality (CTQ) requirements.
For the fastest alignment, include CTQ features, tolerance callouts, and any reporting format requirements in your RFQ. We’ll confirm what’s included before production begins.
NDA, file access control, and secure handling of customer designs.
All customer files are handled under NDA by default. Access is restricted to authorized engineers and production teams, with secure file storage and controlled data sharing throughout quoting and production.
If you have a specific NDA template or program compliance requirement, share it upfront so we can align documentation and access permissions before any file review begins.
These are the questions that usually stop a buyer from moving forward. Here’s how SPI reduces risk with process, documentation, and control—without sending users to external platforms.
Tight tolerances are handled by aligning CTQ features up front, selecting the right process path, and verifying dimensions with inspection deliverables (e.g., CMM + FAI) when required. We confirm measurement method and reporting before production—so you avoid surprises at delivery.
Yes. We manage changes with clear revision control, impact checks on cost/lead time/CTQs, and explicit approval before continuing. This keeps programs stable while still allowing design iterations—especially during prototype or pilot phases.
Instead of routing your job through a marketplace, SPI provides direct engineering communication, controlled quality documentation (CTQ, CMM/FAI, PPAP when needed), and clearer ownership of delivery commitments. That’s especially valuable for repeat orders and high-risk parts.
Customer files are handled under NDA by default, with restricted access and controlled sharing. If your program requires a specific NDA template or compliance workflow, we align it before any file review to protect your IP from day one.
Choose the next step that matches your role—RFQ, engineer consult, or capability overview.
Partner with SPI
Welcome to SPI — an ISO9001/IATF16949-focused CNC machining and injection molding partner in Dongguan, China.
We combine tight-tolerance machining, documented inspection and responsive engineering support to help you move from RFQ to stable production faster, with full traceability and audit-ready quality records.
Share your drawings and requirements — our engineers can suggest practical tolerances, surface finishes and inspection plans before you lock your RFQ.
Use the Contact Us form to upload STEP/IGES files and add notes about tolerances, surface finish and inspection.
Prefer email? Reach us via the form on the Contact Us page and ask to be added to our CNC DFM mailing list.
