TS ISO 406

TS ISO 406 addresses the general topic of tolerancing linear and angular dimensions in technical drawings. In engineering drafting, a tolerance defines the permitted variation from a nominal size, helping ensure that manufactured parts remain functionally compatible within acceptable limits. This standard is relevant as part of the technical drawing language used to communicate size limits clearly and consistently.

What linear and angular tolerances mean in practice

Linear dimensions describe measurable distances such as length, thickness, diameter, or spacing. Angular dimensions describe the angle between faces, axes, or directions. Tolerancing tells the reader how much deviation from the nominal value is acceptable, creating a shared basis for production, inspection, and design communication. This is especially important when a drawing must express not only a size, but also the allowable range around that size.

Why this topic matters in technical drawings

In general engineering practice, tolerances support assembly fit, interchangeability, and functional performance. If tolerances are unclear or poorly chosen, manufacturing costs can rise, inspection becomes more difficult, and parts may not perform as intended. Clear tolerance presentation is therefore a core part of drawing readability and engineering intent. TS ISO 406 belongs to this broader drafting tradition that standardizes how size variation is communicated on drawings.

This record is a withdrawn standard and is historically linked to ISO 406:1987. The title indicates a focus on tolerancing in technical drawings, but the description above provides general technical context rather than clause-by-clause requirements from the full text.