Instead, the permissible deviation is calculated based on the length of the shorter leg of the angle. Why? Because a 0.1mm gap at the tip of a 5mm corner is massive. The same 0.1mm gap at the tip of a 500mm beam is negligible.
This is where saves the day. Specifically, its rules for angular tolerances. iso 2768 angular tolerance
The standard provides a table of . The Short Version (Angular Tolerance Table) For Shorter leg length up to the specified range, here are the rough equivalents (always consult the official standard for production): Instead, the permissible deviation is calculated based on
Disclaimer: Always refer to the latest official ISO 2768-2 standard for exact tables and regulatory requirements before production. The same 0
By choosing the right class (hint: start with ), you avoid paying for unnecessary precision on non-critical angles. And by understanding the leg-length rule, you won’t accidentally request aerospace tolerances on a simple sheet metal bracket.