Part 1 establishes four classes of tolerance, representing different levels of manufacturing precision. The choice of class depends on the production method and the industry sector.
October 26, 2023 Subject: Overview and Application of General Tolerances for Linear and Angular Dimensions din iso 2768
In the world of precision manufacturing, clarity is everything. If you’ve ever looked at a technical drawing and wondered how a machinist knows what to do when a specific dimension doesn't have a tolerance listed, the answer is likely . Part 1 establishes four classes of tolerance, representing
This part focuses on linear and angular dimensions, including external sizes, internal sizes, step sizes, diameters, radii, and chamfer heights. It defines four accuracy classes: For high-precision components. m (medium): The most common class for standard machining. If you’ve ever looked at a technical drawing
is an international manufacturing standard that establishes general tolerances for linear and angular dimensions, as well as geometrical features, on engineering drawings.
General tolerances for angular dimensions apply to angles such as $90^\circ$, $60^\circ$, etc. The tolerance is expressed in minutes and degrees, depending on the length of the shorter leg of the angle.