Technical Drawing with Engineering Graphics, 15th Edition

Chapter Sixteen. Gears and Cams

Objectives

After studying the material in this chapter, you should be able to:

1. Define the characteristics of a spur gear, worm gear, and bevel gear.

2. Calculate the gear ratio and rpm of two mating gears, given the pitch diameters.

3. Define the principal spur gear terms.

4. Draw a spur gear.

5. Describe the relationship between a cam profile and a displacement diagram.

6. Draw a cam profile, given a displacement profile drawing.

7. List the types of cam followers.

Refer to the following standards:

• ANSI Y14.7.1 Gear Drawing Standards, Part 1: For Spur, Helical, Double Helical, and Rack

• ANSI Y14.7.2 Gear and Spline Drawing Standards, Part 2: Bevel and Hypoid Gears

• AGMA 933-B03 Basic Gear Geometry