This is a feature you can implement in a software tool, web app, or engineering spreadsheet related to ISO 2768 general tolerances.
Option 3: Free Reference Tables (Not the full PDF)
Many engineering websites provide free "extracts" or "summary tables" which are sufficient for 90% of shop floor work. Search for "ISO 2768 tolerance chart" on:
4. How Tolerances Are Specified on Drawings
- The tolerance class is specified in the drawing’s general notes, e.g., “Unless otherwise specified: ISO 2768-m.”
- Individual dimensions may override the general tolerance by specifying specific limits or tolerance symbols.
- Angular dimensions use specific angular tolerances defined per class.
- Use of ISO 2768 does not replace the need to specify tight tolerances on critical features.
His apprentice, Leo, hurried in with a stack of blueprints. "The casing arrived from the machinist, Elias, but the interlocking gears won't budge. They’re stuck."
Part 2: Deep Dive into ISO 2768-1 (Linear & Angular Dimensions)
Part 1 specifies four tolerance classes. The designer selects one based on the functional requirements of the part.
Part 2: ISO 2768-2 (Geometrical Tolerances)
While Part 1 deals with size, Part 2 deals with form and position. This includes: