TS 10844

TS 10844 is a standard dealing with the proportions and dimensions of symbols used for geometrical tolerancing in technical drawings. Its focus is the graphical presentation of those symbols: the relative line thicknesses, heights and overall sizes that keep tolerance markings legible and consistent from one drawing to another.

Why symbol size matters in geometrical tolerancing

Geometrical tolerancing is not just about nominal dimensions; it also controls the form, orientation, location and runout of features. In engineering drawing practice, the symbols provide a compact visual language for communicating these requirements between design, manufacturing and inspection. The subject of TS 10844 is the way those symbols are proportioned on the drawing, rather than the meaning of each tolerance itself.

In broader technical documentation practice, standardised symbol dimensions help keep drawings readable across different scales, drafting systems and organisations. Consistent proportions reduce ambiguity, support uniform presentation in feature control frames and notes, and make it easier to recognise tolerance information quickly in complex mechanical drawings. This is especially valuable where graphical clarity and repeatable interpretation are important.

• Covers proportions and dimensions for geometrical tolerancing symbols.
• Addresses the graphical consistency of symbols used in technical drawings.
• Supports clear presentation of tolerance information in engineering documentation.
• Identified as equivalent to ISO 7083:1983 and later withdrawn.