TS ISO 12753-2

TS ISO 12753-2 is a standard for compasses that addresses the characteristics of precision (P) and standard (S) compasses, together with their designation and marking rules. In technical drawing equipment, such identification helps separate instruments by intended use and expected level of precision, so the right compass type can be selected and described consistently.

In general technical context, compasses are two-point drawing instruments used to draw circles, transfer radii, and carry dimensions from one part of a drawing or workpiece to another. The distinction between precision and standard compasses is important because it reflects differences in intended application, build quality, and the level of accuracy normally associated with the tool category. This standard focuses on how those categories are named and marked, supporting uniform product description across drawings, catalogues, and markings.

Designation and marking of compass classes

The scope is based on the broader compass terminology established in TS ISO 12753-1 and focuses here on how P and S classes are identified. For users, that means the product can be recognized as a drawing instrument category at a glance, without ambiguity in technical documentation. It also supports consistent classification of compass variants in the drafting and stationery equipment field.

• Classification of precision (P) and standard (S) compasses
• Short designation rules
• Marking rules
• Consistent terminology for drawing equipment