Precision Manufacturing: 5-Axis CNC Machining, Injection Molds, and Rapid Prototyping 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.
Inspection-First
Inspection-first manufacturing is our way of designing quality into the process before CNC machining or Swiss-type turning begins, so engineering teams and OEMs see fewer surprises and more predictable outcomes.
Inspection-first manufacturing is an approach where quality planning begins before machining starts, especially for tight-tolerance CNC machining and Swiss-type turning programs.
Instead of treating inspection as a final gate, inspection-first manufacturing tackles quality risk up front, so potential issues on critical features, tooling, and fixtures are found during planning—not after parts reach your line.
At SPI™, we define CTQs, inspection methods, and measurement plans during DFM and process planning. This includes agreeing on gauges, sampling plans, and CMM strategies before we cut material.
This approach reduces quality risk, shortens iteration cycles, and ensures stable SPC/Cpk performance on critical features, giving engineering teams and OEMs predictable results from prototype through low- and medium-volume production.
If you want inspection-first manufacturing on your next CNC or Swiss-type project, share your drawing or 3D model. We’ll outline CTQs, DFM feedback, and a draft inspection plan so you can see how our approach protects quality before parts are machined.
Share a drawingCapabilities
We organize our manufacturing around core precision machining capabilities, supported by tooling and molding processes that help engineering teams move from early prototypes to low- and medium-volume production with a single supplier.
Our core focus is tight-tolerance metal and plastic components where precision and repeatability matter most.
Around our machining core, we add supporting processes that shorten development time and simplify supply chains for product developers and OEMs.
Share your drawing or 3D model if you’re unsure which process is the best fit. Our team can recommend whether 5-axis CNC machining, Swiss-type turning, rapid tooling, or injection molding is most suitable for your part and volume.
Ask for process recommendationCompany Snapshot
Super-Ingenuity Limited (SPI™) is a privately owned, inspection-first manufacturing company in Chang’an, Dongguan, China. Founded in 2018 on craftsmanship roots, we support aerospace, automotive, medical, electronics, and robotics teams worldwide with CNC machining and molding—from prototype to production, with measurable, audit-ready quality.
For certificates, equipment lists, and detailed capabilities, visit our Company Profile
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.
Quality & Inspection
Our quality system supports customers who require documented compliance and process capability. We provide CMM inspection reports, First Article Inspection (FAI), and SPC/Cpk monitoring on critical-to-quality (CTQ) features, enabling data-driven quality control and audit readiness.
Our processes are aligned with ISO quality standards to support regulated and high-reliability applications, including automotive, industrial automation, and other safety-critical systems.
We combine inspection-first manufacturing with modern metrology to make sure quality is measured, not assumed.
Our quality and inspection systems are designed for engineering teams and OEMs that need more than just a pass/fail result.
Every lot is backed by traceable quality data so your team can make decisions with confidence.
If your project requires documented quality—CMM reports, FAI, or SPC/Cpk on CTQs—share your specifications and quality requirements. We’ll outline how our inspection-first manufacturing and quality system can support your engineering team and OEM standards.
Share quality requirementsDFM, Speed & Experience
Fast and informed feedback is critical in early development. SPI™ provides DFM feedback within 12–24 hours and delivers prototype machining typically within 7–10 days, helping teams validate designs faster and reduce costly redesigns.
SPI™ has supported global customers across medical, industrial, and precision equipment industries, delivering inspected components for applications where consistency and reliability matter. Our team works closely with customer engineers to ensure manufacturability, inspection feasibility, and stable production outcomes.
Our engineers review your drawings and 3D models for manufacturability, inspection access, and cost drivers. Within 12–24 hours, you receive clear DFM feedback that highlights risks on CTQs, tolerance stacks, material choices, and process options.
For CNC machining and Swiss-type turning prototypes, we typically deliver parts within 7–10 days after order confirmation. This helps product developers and OEMs run fit, function, and assembly checks earlier in the development cycle.
Faster, data-backed iterations reduce the number of redesign loops and bring you closer to a production-ready design with each prototype build.
Over time, SPI™ has supported global customers in medical devices, industrial automation, and precision equipment, supplying inspected components where every micron and every lot count.
Our experience working directly with customer engineering and quality teams means we understand how documentation, inspection plans, and stable lead times feed into your internal approval process and long-term supplier strategy.
If you need engineering support, fast DFM, and prototype machining to move your design forward, share your drawing or 3D model. We’ll provide DFM feedback, indicative lead times, and a path from prototype to stable production.
Send files for DFMFAQ
Here are some of the most common questions engineering teams and buyers ask before working with SPI™. If you don’t see your question here, contact us and we’ll be happy to help.
Yes. We support mutual NDAs and countersign within one business day. Drawings are access-controlled and retained for [X days/months, e.g., 180 days] for re-orders before secure archival or deletion. We can accept PDF, STEP/STP, IGES, STL; password-protected archives are supported on request. A one-page data-handling note is available.
Typical machining tolerance is ±0.01 mm. On clearly defined features with a robust datum/fixturing and a documented measurement plan, we can validate up to ±0.002 mm using CMM. Actual capability depends on feature type/length, material, and inspection conditions. Sample CMM results are available on request.
Prototypes: 7–10 days for common alloys and in-house finishes; add 3–5 days for special heat-treat/finishes.
Production: typically 2–5 weeks, depending on lot size, process mix, and inspection scope. Partial shipments and capacity parallelization are available.
FAI/CMM reports, material and finish certificates, lot-level traceability labels, and packaging photos before dispatch if needed. For production CTQs, SPC/Cpk charts are available on request. PPAP-style elements can be provided when aligned with scope.
Yes. We handle pilot lots and multi-SKU small batches. MOQ depends on tooling/setup and inspection scope; share your volumes and we’ll propose the most economical plan.
Yes. We can validate and run with your gauges/fixtures after alignment during FAI. Where required, gauge verification or R&R can be discussed.
For new accounts we use [deposit/milestone]. For repeat customers, [Net-X] subject to credit. We support EXW/FOB/CIF/DDP where feasible and compliant.
Moisture and corrosion protection (e.g., VCI/desiccant), protective partitioning/foam as required, and wooden crates for export. Clear lot labels for traceability. Photo confirmation can be shared before dispatch.
Immediate containment, documented root-cause analysis, and corrective action. Remakes or re-work are prioritized based on severity and program timelines. 8D reports can be provided when requested.
Extreme tolerances without defined datums/gauges or a measurement plan.
Impractical rush that cannot include critical heat-treat/finishes/inspection—we’ll propose a phased ship plan.
Certifications/tests not in scope—we align a documented plan before kickoff.
If your project requires tight tolerances, documented inspection data, or early DFM guidance, talk to our engineers or upload your RFQ to get started.
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.
