Iso 20457 Tolerance Table Pdf May 2026
1. Overview & Purpose The ISO 20457:2018 standard – Geometrical product specifications (GPS) — Tolerances for +/- limit deviations of linear and angular dimensions without individual tolerance indications – provides a unified, globally recognized table system for general tolerances. The PDF version of this tolerance table is engineered to be a single-source reference for designers, quality engineers, and machinists.
Unlike scattered company-specific tolerance notes, the ISO 20457 PDF delivers a set of limit deviations applicable when no individual tolerance is explicitly shown on a drawing. 2. Key Technical Features of the PDF Table 2.1 Comprehensive Tolerance Classes The PDF includes four distinct tolerance classes (fine, medium, coarse, very coarse) for four fundamental dimension types: iso 20457 tolerance table pdf