Active/Collaborative Learning Student Teams Integrating Technology Effectively Women and Minorities Assessment and Evaluation EC2000 Emerging Technology Foundation Coalition Curricula Concept Inventories
Dimensioning and Tolerance
Back to Overall Map

Dimensioning and Tolerance

When are Dimensioning and Tolerance Covered?

Basic Dimensioning is introduced in ENGR111 during Class 14.2*

Dimensioning is revisited at the beginning of ENGR112 during Class 18.2*.

Tolerancing is introduced in ENGR112 during Class 18.2*.

*Explaination of Class numbering System


Class 14.2: Basic Dimensioning
Be able to understand the basic rules of dimensioning
Apply dimensions to objects in accordance with engineering standards
Define the following items: Dimension line, Extension line, Reference dimension, and Leader
Be able to recognize the following machined holes: Spotface, Counterbore, Countersink, and Counterdrill
Class 18.2: Dimensioning/Tolerancing in AutoCAD
Know dimensioning techniques for machined holes
Know how to dimension standard parts
Determine tolerances for use in design
Apply tolerances using AutoCAD

Class Agenda

Class 14.2: Basic Dimensioning
RAT - quiz
Lecture material on basic terminolgy, styles, geometric features and errors in dimensioning
Lecture material on machines holes
  Team exercise
Class 18.2: Dimensioning
Review of dimensioning terminology and rules
  Individual HW assignment
Pair Exercise
Lecture Material on dimensioning in AutoCAD
Lecture material on dimensioning machine holes, threads, and other standard parts
  HW assignment
  Tolerancing in AutoCAD
  Lecture material on general concepts of tolerancing
  Lecture material on Linear Tolerances in AutoCAD
  Linear tolerance example
  HW assignment

Why are Dimensioning and Tolerance Important?

Dimensioning allows a designed part to be manufactured and are always in real world units.

Tolerancing is important to the manufacturer because it determines the accuracy and cost of the final product. In general, tolerances should be as large as possible to balance expense with function.

  • Class 14.2 Powerpoint
  • Class 18.2 Powerpoint

Related Links:









Partner Links