1. 1 Introduction to Engineering Dimensioning - 2 Agenda Understand the principles of good dimensioning practice Apply the standard dimensioning practices for mechanical drawings

2. 2 Dimensioning Orthographic and isometric views define the shape and general features of the object Dimensioning adds information that specifies  Size of the object  Location of features (e.g. holes)  Characteristics of features (e.g. depth and diameter of hole) Dimensions also communicate the Tolerance (or accuracy) required

3. 3 Dimensions include notes for construction or manufacturing Type of material to use How smooth or rough the surface should be Etc…

4. 4 Standards for Dimensioning Defined Standards have been developed Available from ANSI  American National Standards Institute

5. 5 Scaling vs. Dimensioning Drawings can be of different scales, but dimensions are ALWAYS at full scale.

6. 6 Dimensioning - Terminology (Study 4.2.1 and 4.2.2 of text, carefully)

7. 7 Dimensioning - Text Height and Standard Configurations.25 in.375 in

8. 8 Dimensioning Basic Shapes -Assumptions Perpendicularity Symmetry

9. 9 Dimensioning Basic Shapes -Simple Shapes Rectangular Prism (Principal Dimensions: H,W,D) D W H

10. 10 Video on Dimensioning

11. 11 Assignment Drawing #2