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Poor tolerance specification is the leading cause of inaccurate quotes, failed First Article Inspections, and unnecessary rework on CNC milled parts. This guide covers how to specify CNC milling tolerances on a technical drawing, from setting a default ISO 2768 class in the title block to identifying features that genuinely require tight individual callouts. It also covers how surface treatments like anodizing and plating affect fit-critical dimensions, what tolerance tiers China CNC factories actually hold across general, precision, Swiss, and EDM processes, and how each tier drives per-part cost.
From hourly rates to per-part pricing — see what CNC machining actually costs in China and how to get accurate quotes from verified factories.
82.2% of China's verified CNC output comes from just three provinces — know which one matches your industry before you request a single quote.
Custom metal fabrication online has become easier in 2026, but choosing the right platform still depends on cost structure risk tolerance and production needs. This guide compares leading sourcing models and platforms to help engineers and procurement teams decide which option fits each project.
Discover how to choose the right metal stamping services online and what really matters when comparing platforms in 2026.
Learn the key differences between fabrication and manufacturing, how each process works, and when to use them in product development.
A quick breakdown of how Sinker EDM forms intricate cavities in hard materials using spark erosion and why it’s ideal for molds, dies, and high-precision parts.
Learn how casting turns molten metal into complex, durable parts. This quick guide explains the process, materials, and the four main casting methods used in manufacturing.
Climb or conventional milling—which gives better results? Learn how each cutting method affects surface finish, tool life, and workpiece stability. This guide explains the differences between climb vs conventional milling and helps you decide which approach fits your CNC machining projects best on Haizol Marketplace.