What is BS EN ISO 21920-1:2022 about?
A new international standard, BS EN ISO 21920-1:2022 provides updated requirements for indicating surface texture on engineering drawings and CAD models. This document updates and replaces BS EN ISO 1302, and is being published as part of a package of new and revised surface texture standards, which also includes:
- BS EN ISO 21920-2:2022, Geometrical product specifications (GPS) — Surface texture: Profile — Part 2: Terms, definitions and surface texture parameters
- BS EN ISO 21920-3:2022, Geometrical product specifications (GPS) — Surface texture: Profile — Part 3: Specification operators
- BS EN ISO 25178-2:2022, Surface texture: Areal — Part 2: Terms, definitions and surface texture parameters
- BS EN ISO 12179:2022, Surface texture: Profile method — Calibration of contact (stylus) instruments
Who is BS EN ISO 21920-1:2022 for?
- Mechanical engineers, design engineers and engineering designers in aerospace, defence, automotive, rail, nuclear and medical devices sectors
- Any engineering or manufacturing organizations that need to produce engineering drawings (using 2D manual drawings or 3D CAD-generated models) in their product design and development processes
- Manufacturing and production engineers, and metrologists and quality control teams who measure and verify that specifications have been met
- Independent design consultancies and design agencies
- Users of the former national standard BS 308
What does BS EN ISO 21920-1:2022 cover?
It specifies the rules for indicating surface texture by profile methods in technical product documentation using graphical symbols.
Why should you use BS EN ISO 21920-1:2022?
It helps companies indicate surface texture requirements unequivocally on drawings and CAD models. It can also help users to:
- Implement a new, modern approach to the indication of surface texture requirements on mechanical engineering drawings and CAD models
- Move away from traditional, outdated practices
- Enter new markets
- Increase confidence in their work product
BS EN ISO 21920-1:2022 contributes to UN Sustainable Development Goal 9 on industry, innovation and infrastructure.
What’s new about BS EN ISO 21920-1:2022?
This is a brand-new standard, but BS EN ISO 21920-1:2022 replaces BS EN ISO 1302:2002 which is being withdrawn. The changes introduced include:
a) New specification elements for indication are definedb) The maximum tolerance acceptance rule is the default tolerance acceptance rule
