TS ISO 1122-1

TS ISO 1122-1 is a terminology standard for gear terms, focusing on definitions related to gear geometry. It provides a common technical language for the description of gear forms, dimensional relationships, and geometric features used in design, documentation, and engineering communication. This part covers the geometry-related section of the international gear vocabulary.

Why gear geometry needs a controlled vocabulary

In gear engineering, terms such as tooth profile, pitch, module, pitch circle, tooth height, and related geometric concepts must be distinguished carefully. Clear definitions help ensure consistent interpretation of drawings, design notes, manufacturing specifications, and inspection results. A vocabulary standard like this supports multilingual use by keeping the meaning of each concept stable even when the wording changes from one language to another.

What this part covers

• Focuses on definitions related specifically to gear geometry.
• Uses internationally valid definitions as the reference point.
• Aims for each language to use a term that reflects the meaning of the definition as directly as possible.
• Serves as a shared reference for terminology in the gear field.

In general technical context, a terminology standard does not prescribe gear design calculations or performance limits. Its value lies in making the language of gearing precise and consistent, which supports product documentation, training, classification, and communication across engineering teams.