BS EN ISO 3040:2016

What is ISO 3040- Dimensioning and tolerancing- Cones about? 

ISO 3040 is a safety standard on dimensioning and tolerancing in cones. 

ISO 3040 specifies graphical indication applicable to a cone (right-angle circular cones) to define its dimensioning or to specify its tolerancing. 

For the purposes of ISO 3040, the term “cone” relates to right-angle circular cones only (any intersection by a plane perpendicular to the axis of the nominal cone is a circle). 

Note 1: For simplicity, only truncated cones have been represented in ISO 3040. However, ISO 3040 can be applied to any type of cone within its scope. 

Note 2: ISO 3040 is not intended to prevent the use of other methods of dimensioning and tolerancing. 

Who is ISO 3040- Dimensioning and tolerancing- Cones for?  

ISO 3040 on dimensioning and tolerancing is relevant to: 

• Manufacturers  
• Product designers 
• People working on geometric specifications 

Why should you use ISO 3040- Dimensioning and tolerancing- Cones? 

ISO 3040 is a geometrical product specification (GPS) standard and is to be regarded as a general GPS standard, applicable to a conical feature.  

ISO 3040 influences chain links A and B of the chain of standards on size, form, orientation, location, and run out.  

Overall, ISO 3040 is useful as it provides guidance on the several kinds of dimensions on a cone. 

What’s changed since the last update? 

BS EN ISO 3040:2016 supersedes BS EN ISO 3040:2012 which is withdrawn. 

BS EN ISO 3040:2016 replaces the third edition (ISO 3040:2009), which has been technically revised: 

• Clause 6 on the tolerancing of cones has been revised 
• Annex A on former practice from ISO 3040:1990 has been deleted 
• A new informative Annex A with examples has been added