Geometry Dimensions and Tolerance, Perpendicularity

Geometric Dimensioning and Tolerancing (GD&T) Perpendicularity in Geometric Dimensioning and Tolerancing can mean two very different things depending on which reference feature is called out. The normal form or Surface Perpendicularity is a tolerance that controls Perpendicularity between two 90° surfaces, or features. Surface Perpendicularity is controlled with two parallel planes acting as its tolerance zone. Axis Perpendicularity is a tolerance that controls how perpendicular a specific axis needs to be to a datum. Axis Perpendicularity is controlled by a cylinder around a theoretical perfectly parallel axis. Pay close attention if a hole or pin is referenced since axis perpendicularity is commonly called out on these features. Visit the website for details https://udhasulnayakblog.com/perpendicularity-tolerance-at-an-angle-of-90/ Visit the website for details https://udhasulnayakblog.com/flatness-tolerance-boundary/