This part defines four tolerance classes for dimensions such as external/internal sizes, radii, and chamfers: m (medium) c (coarse) v (very coarse) General Tolerances for Linear Dimensions (mm) Nominal Size Range m (medium) c (coarse) v (very coarse) 120 to 400 400 to 1000 Part 2: Geometrical Tolerances (ISO 2768-2)
ISO 2768 simplifies engineering drawings by eliminating the need to assign individual tolerances to every dimension. It is used when: Iso 2768 General Tolerances Pdf
Note: These values scale with feature length; full tables in the standard. This part defines four tolerance classes for dimensions
: Specifies general tolerances for linear and angular dimensions (length, width, radii, and angles). ISO 2768-1 defines four distinct classes, from loosest
ISO 2768-1 defines four distinct classes, from loosest to tightest:
These tolerances apply to external dimensions (shafts, widths) and internal dimensions (holes, slots) individually. They assume a room temperature of 20°C.