Skip to main content

Author: Brandon John

Why use Profile over Coordinate Dimensioning

by Brandon John on August 16, 2021.

To determine when to use Profile of a Surface or Coordinate Dimensioning, let’s first look at what the 2009 ASME Y14.5 Standard tells us.  Paragraph 2.1.1 was revised to emphasize/encourage the use of basic dimensions in combination with geometric tolerancing...

Relating the Secondary Datum Feature to Primary Datums

by Brandon John on June 23, 2021.

Properly defining, qualifying, and referencing datum features is essential to ensure that parts are properly manufactured and inspected.  To begin exploring proper use of datum features, it is helpful if we first review definitions and rules for selecting, identifying, and...