ISO9001/IATF16949 Certified CNC Manufacturer in China | 24h Quotation | Free DFM Support
Reading time: 8–10 minutes | Audience: buyers, design engineers, process/quality engineers
This precision CNC technical-article brings the scattered “tribal knowledge” of the shop floor into one place. You’ll get a clear CNC tolerance chart mindset, surface finish guidelines for CNC (Ra vs Rz), realistic 5-axis machining tolerances, a concise CNC materials machinability guide, and the essentials of CPK inspection for CNC parts—plus proven tight tolerance machining techniques and precision machining packaging tips. At the end you’ll see what’s inside our download CNC worksheets so you can apply everything on your next RFQ.
5-Axis CNC → https://super-ingenuity.cn/5-axis-cnc-machining/
Swiss-Type Turning → https://super-ingenuity.cn/swiss-lathe/
Quality & CPK → https://super-ingenuity.cn/quality-assurance/
Rapid Tooling → https://super-ingenuity.cn/rapid-tooling/
Quotation (Price/Lead-Time) → https://super-ingenuity.cn/faq/quotation/
Our prospective customers—sourcing managers and design/quality engineers—often hit the same roadblocks: unclear tolerances, finishes misaligned with function, and quotes delayed by missing inspection or fixturing plans.
This page is a practical hub to align specs before an RFQ: what to hold tight (and why), how to choose Ra vs Rz, when 5-axis vs Swiss-type makes sense, and how to prove capability (target CPK ≥ 1.67).
Skim it in minutes, grab the worksheets, and send a cleaner drawing for a faster, more accurate quote.
Design tips for our top industries like aerospace and defense, automotive, energy, medical and dental, robotics, supply chain, and more.
Examples of SPI’s work with customers across various industries and manufacturing processes.
Information about common materials used in manufacturing processes.
Information about common Surface Finishing used in manufacturing processes.
