TS ISO 8015

TS ISO 8015 is the Turkish edition of the standard that addresses the fundamental principle of tolerancing in technical drawings and the relationship between size tolerances and form and position tolerances. Its core topic is how dimensional limits and geometric limits are distinguished, and how they should be interpreted together on an engineering drawing.

The basic distinction in tolerancing

In general technical practice, a size tolerance defines the acceptable limits of a dimension, while form tolerances control geometric qualities such as straightness, flatness, and roundness, and position tolerances control the location of features relative to one another. The main relation covered by this standard is that these two groups of tolerances are not the same and must not be treated as interchangeable when reading a drawing. A part may satisfy a dimensional limit without automatically satisfying its geometric requirements.

Why this matters in engineering drawings

As general technical context, a principle standard of this kind helps make drawing interpretation more consistent across design, manufacturing, and inspection. Clear separation between dimensional tolerancing and geometric tolerancing reduces ambiguity about what actually controls function. For engineers, draughtspersons, and inspectors, the subject is therefore not only the symbols used on drawings, but also the logic for reading those symbols and understanding their effect on a part.

This listing refers to the withdrawn TS ISO 8015 edition and is based on ISO 8015:1985. Standards in this family may exist in different national versions, but the value of this document lies in the common framework it gives for the basic interpretation of tolerances in technical drawing.

• Addresses the relationship between size tolerances and geometric tolerances.
• Emphasises the distinction between dimensional and form/position interpretation.
• Applies to machine engineering drawings and general technical drawing practice.
• This is a withdrawn TS edition and serves as a historical reference.