Reduces drawing complexity by eliminating the need to label every single dimension with a specific tolerance.
Angular tolerances apply to the length of the shorter leg of the angle.
Tolerances are scaled according to the size of the nominal dimension. Larger dimensions receive wider tolerance zones because variations naturally increase with part size. 1. Linear Dimensions general tolerance iso 2768-mk
Refers to ISO 2768-1 , which governs linear and angular dimensions (like lengths, radii, and diameters).
Linear dimensions include external sizes, internal sizes, steps, diameters, and distances. Nominal Size Range (mm) Permissible Deviation (mm) for Class Over 3 to 6 Over 6 to 30 Over 30 to 120 Over 120 to 400 Over 400 to 1000 Over 1000 to 2000 Over 2000 to 4000 External Radii and Chamfer Heights Reduces drawing complexity by eliminating the need to
It ensures that a machine shop in one country interprets "no tolerance" the same way as a shop in another. Part 1: Dimensional Tolerances (The "m")
: Represents the Medium tolerance class for linear and angular dimensions (such as lengths, radii, diameters, and angles). Linear dimensions include external sizes
Answer key (concise) — for examiner use only
A design engineer creates a mounting bracket for an electric motor. The bracket has:
Because ISO is globally recognized, a drawing designed in Germany using ISO 2768-mK can be accurately interpreted and manufactured by a machine shop in Japan or the United States without communication barriers. Important Exceptions and Limitations