What is BS EN ISO 21920-2:2022 about?
A new international standard, BS EN ISO 21920-2:2022 gives updated terms, definitions and parameters for surface texture requirements used on engineering drawings and CAD models. It replaces a number of standards that have been the main surface texture standards since the late 1990s (see below) and is being published as part of a package of new and revised surface texture standards, which also includes:
- BS EN ISO 21920-1:2022, Geometrical product specifications (GPS) — Surface texture: Profile — Part 1: Indication of surface texture
- 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 21920-2:2022 cover?
It specifies terms, definitions and parameters for the determination of surface texture by profile methods.
Why should you use BS EN ISO 21920-2:2022?
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- Move away from traditional, outdated practices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 21920-2:2022 contributes to UN Sustainable Development Goal 9 on industry, innovation and infrastructure.
What’s new about BS EN ISO 21920-2:2022?
This is a brand-new standard that replaces BS EN ISO 4287:1998, BS EN ISO 12085:1997, BS EN ISO 13565-2:1998 and BS ISO 13565-3:2000. The changes introduced in BS EN ISO 21920-2:2022 include:
a) All field parameters are now related to the evaluation length
b) Unambiguous evaluation of profile elements
c) Definition of new parameters, in particular parameters based on the watershed transformation