CNC Machining & Injection Molding — DFM/Moldflow Support, CMM Inspection, Prototype to Production Solutions.
About SPI™
SPI™ is a precision machining manufacturer specializing in inspection-first CNC machining and Swiss-type turning. We support engineering teams and OEMs that require tight tolerances, documented quality, and reliable manufacturing outcomes—from early prototypes to low- and medium-volume production.
This page is built for supplier validation, not for general company branding. Buyers can review certifications, core processes, inspection methods, typical tolerances, and available quality documents before sending CAD, moving to RFQ, approving samples, or launching production.
Founded in 2018 in Dongguan, China, SPI supports international OEM programs through in-house coordination of precision CNC machining, injection molding, quality planning, and documented quality workflows. Our operations are structured to provide direct manufacturing execution for clients requiring technical transparency and project accountability.
Our Dongguan export workflow supports English-language engineering communication, documented quality expectations, and controlled production handoff. This facility is optimized for international OEM programs that require rigorous drawing reviews and verified manufacturing records throughout the production cycle.
Best-fit programs include tolerance-driven parts and documentation-required projects that need DFM review, defined inspection methods, and controlled release before manufacturing starts. We commonly support prototype to low- and mid-volume production where dimensional consistency and quality records matter more than lowest-price sourcing alone.
Inspection-first manufacturing means quality planning starts before material is cut. CTQ features, datum logic, measurement methods, and required documents are reviewed during engineering planning so CNC machining or molding begins with an agreed verification path, not only with final inspection.
At SPI, quality planning begins before production starts rather than relying only on final-part inspection. Execution starts with CTQ (Critical-to-Quality) identification during the project review. We ensure that datum logic, critical features, and measurement methods are reviewed and aligned with drawing requirements before the first piece of steel is cut.
Every project undergoes a formal engineer review before production release. Each CTQ feature is assigned to a defined verification method such as CMM, vision measurement, calipers, micrometers, or functional gaging. This alignment happens during the DFM stage so the process and inspection method are matched to the required tolerances before release.
For high-precision features, Hexagon CMM verification is used for critical dimensions defined by the drawing and inspection plan. We provide FAI (First Article Inspection) for initial approval. For mid- to high-volume programs, SPC/Cpk analysis may be applied where process stability monitoring is required.
Lot and revision traceability is managed according to customer requirements, document scope, and program risk level. Documentation, inspection scope, and traceability requirements depend on specific customer expectations and applicable quality standards.
| Process | Best For | Typical Output Stage | Validation Relevance |
|---|---|---|---|
| CNC Machining | High-precision, tolerance-driven features | Prototype to Mid-volume | CMM-linked dimensional verification |
| Injection Molding | Repeatable parts with dimensional control | Production launch | PPAP- and FAI-related documentation support based on requirements |
| Rapid Tooling | Functional testing & pilot runs | Bridge from validation | DFM review and early-stage process validation support |
Depending on project scope, customer requirements, and approval level, SPI can provide certification records, equipment information, CMM reports, FAI, material certificates, CoC, and PPAP-related documents. The required submission scope should be aligned during quotation or engineering review so supplier approval and sample release are not delayed.
*Note: The document scope depends on project stage, customer requirements, and required approval level. Scope alignment is recommended during the RFQ or DFM review phase.
Each industry has different documentation, inspection, material, and approval expectations. SPI supports manufacturing and verification based on customer-defined quality scope and program requirements.
*Note: SPI provides manufacturing and inspection support based on customer-defined quality scope and program requirements. We do not imply ISO 13485 or AS9100 certification unless explicitly stated under customer-defined quality scope or specific program agreements.
SPI is typically a better fit for programs requiring dimensional control, engineering communication, and defined quality documentation such as CMM reports, FAI, or material certificates. Programs with no document control, lowest-cost sourcing priorities, or certification requirements not explicitly listed on this site may be better served by another supplier model.
Mission & Vision
Our mission and vision guide how we work with engineering teams every day—from the first drawing review to stable, repeatable production.
Turn drawings into measured, repeatable parts—fast, responsibly, and with inspection-first discipline.
Become Asia’s most trusted, documentation-driven manufacturing partner.
Be recognized for predictable quality, transparent communication, and on-time delivery.
Send the drawing, key tolerances, material callouts, and required quality documents such as CMM reports, FAI, material certificates, or PPAP-related files first. This helps align DFM review, inspection planning, and approval scope before quotation, sample approval, or production release.
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