TS EN ISO 5458

TS EN ISO 5458 is a technical standard within the Geometrical Product Specifications (GPS) system that addresses positional tolerancing. It defines how far a feature may deviate from its nominal location, helping describe the functional placement of elements such as holes, shafts, slots, points and plane-related features. Because positional tolerancing controls location as well as size-related intent, it is a key concept in engineering drawings and inspection practice.

What positional tolerancing means in practice

In general technical terms, this method applies to the location of a point, a nominally straight line and a nominally plane surface. In practice, that includes derived features such as the centre of a sphere, the axis of a hole or shaft, and the median surface of a slot. The purpose is to define a tolerance zone that the feature must remain within, so that assembly fit, alignment and interchangeability can be managed in a predictable way.

Role within GPS and related drawing standards

Within the wider GPS framework, positional tolerancing is one of the main tools used to distinguish location control from form and orientation control. The referenced TS 1304 ISO 1101 provides the general framework for geometrical tolerancing, while TS EN ISO 5458 focuses specifically on position. For product definition, drawing interpretation and verification, correct location specification is essential because it directly affects how parts function together.

This record is a withdrawn standard, but the subject remains important for understanding how geometric tolerances are interpreted in technical documentation. It is especially relevant wherever hole patterns, axis locations and mating-part positioning accuracy must be clearly specified.