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Introduction to Engineering Dimensioning - 3 Agenda Dimensioning cylinders and cones Locating holes and other features General guidelines.

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Presentation on theme: "Introduction to Engineering Dimensioning - 3 Agenda Dimensioning cylinders and cones Locating holes and other features General guidelines."— Presentation transcript:

1 Introduction to Engineering Dimensioning - 3 Agenda Dimensioning cylinders and cones Locating holes and other features General guidelines

2 Dimensioning Basic Shapes -Simple Shapes Cylinders Positive (solid) Negative (hole) Φ means diameter

3 Dimensioning Basic Shapes -Simple Shapes Cone 36.4°

4 Frustum Dimensioning Basic Shapes -Simple Shapes

5 Dimensioning Shows A) Size & B) Location and Orientation Size Location & Orientation When locating a hole, or positive cylinder, dimension to the center line (See B & C above)

6 Principles of Good Dimensioning (Table 4.1 ) The overriding principle of dimensioning is CLARITY Principles – not an infallible rule set, need to apply good judgment.

7 Some General Guidelines – Clarity is the goal. Place Dimension in view that most clearly describes feature Preferred Avoid

8 Some General Guidelines – Clarity is the goal. Dimension Outside of View Avoid Good Practice

9 Some General Guidelines Start by dimensioning basic outside dimensions of the object. Add dimension for location and size of removed features Add general and specific notes – such as tolerances

10 Practice Problem 1 – Assume block is 2 in square and hole is 1 in diameter Size: Ht, Wt, Depth, Hole Dia. Location: Center of Hole * There is a full-page reproduction following the lecture notes for your use.

11 Assignments Drawing 3

12 Following are instructor only slides

13 Practice Problem 1 – Assume block is 2 in square and hole is 1 in diameter Size: Ht, Wt, Depth, Hole Diameter. Location: Center of Hole Φ 1.0


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