TS EN ISO 12180-2

TS EN ISO 12180-2 is the GPS document that focuses on how cylindricity is specified for complete integral features. In practical terms, it supports a consistent language for defining the geometric form of cylindrical features on drawings and in measurement documentation, so the intended cylindrical control is interpreted the same way across design and inspection activities.

What a specification operator means in cylindricity

In general technical terms, cylindricity is a form characteristic describing how closely a real cylindrical surface approaches an ideal cylinder. In the GPS framework, a specification operator defines how that characteristic is to be understood when it is stated on a technical document. The scope here is limited to complete integral features only, and to features whose geometric characteristic is a cylinder; it does not replace other geometric characteristics such as size, orientation, or location, which are treated separately in the GPS system.

Why this part matters in engineering practice

Cylindrical features are central to shafts, bores, sleeves, bearings, and many other machine elements. A clear specification language for cylindricity helps align design intent, metrology, and quality control. The value of this standard lies in clarifying what kind of feature the cylindricity specification applies to, while the broader evaluation chain is understood together with the related GPS documents that define complementary rules and interpretation principles.

• Applies to complete integral cylindrical features.
• Targets features with the geometric characteristic of a cylinder.
• Defines how cylindricity specifications are interpreted.
• Supports consistent communication between design and inspection.