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# 12aDimensioning - Dimensioning Course Introduction to...

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Sheet Course: Introduction to Engineering Graphics and Visualization copyright 2010, Georgia Institute of Technology Dimensioning 1

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2 Sheet Course: Introduction to Engineering Graphics and Visualization copyright 2010, Georgia Institute of Technology
3 Sheet Course: Introduction to Engineering Graphics and Visualization copyright 2010, Georgia Institute of Technology Assignment Read Chapter 15 in the textbook.

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4 Sheet Course: Introduction to Engineering Graphics and Visualization copyright 2010, Georgia Institute of Technology Dimensioning Basics ANSI Standard: ASME Y14.5M-1994 Terminology Units of Measure Reading Direction
5 Sheet Course: Introduction to Engineering Graphics and Visualization copyright 2010, Georgia Institute of Technology Size & Location Add All dimensions necessary to fabricate. Dimensions should communicate design intent. (To check, try to draw a pictorial using the dimensions on your drawing.) L Always show overall dimensions.

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6 Sheet Course: Introduction to Engineering Graphics and Visualization copyright 2010, Georgia Institute of Technology Dimensioning Terminology
7 Sheet Course: Introduction to Engineering Graphics and Visualization copyright 2010, Georgia Institute of Technology Units of Measure decimal inches (preferred), fractional inches, feet and fractional inches, decimal feet SI or metric – millimeter (mm) leading zero: metric – yes; inches – no If units (e.g., IN or mm) are not included with each dimension, specify the units used with a note on the drawing; for example UNLESS OTHERWISE SPECIFIED, ALL DIMENSIONS ARE IN INCHES or SI or METRIC

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8 Sheet Course: Introduction to Engineering Graphics and Visualization copyright 2010, Georgia Institute of Technology Reading Direction Read from bottom (Preferred) Read from bottom or right
9 Sheet Course: Introduction to Engineering Graphics and Visualization copyright 2010, Georgia Institute of Technology How to Start Dimensioning 1. Identify each type of feature. If it is a circle , determine if it is a hole feature or a cylinder feature. 2. Find the view which shows that feature as true size and shape .

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