一般公差 規格表
3種規格資料
一般公差是圖紙上未標註個別公差的尺寸所適用的基本公差。按KS B ISO 2768-1分為四級。功能重要尺寸必須標註個別公差。
常見問題 (FAQ)
What is a general tolerance (ordinary tolerance)?
Tolerances automatically applied to dimensions without individual annotations. Per KS B ISO 2768-1 (ISO 2768), there are four grades: f (fine), m (medium), c (coarse), and v (very coarse).
How do I select a general tolerance grade?
Use f (fine) for precision machinery and optics, m (medium) for general machining, and c (coarse) for sheet metal and welded structures. State in the title block, e.g., "General Tolerance KS B ISO 2768-1 – m".