January 2026
Intermediate
900 pages
23h 23m
English
Content preview from Machine Design, 2nd Edition by Pearson
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CHAPTER 29
Gearbox
Chapter Objectives
- Identify the speed ratios for a given automobile gearbox.
- Determine the number of gears on main, lay shaft, and idler gear shaft.
- Work out the number of teeth on various gears to provide the desired speed ratios.
- Determine the epicyclic gear trains with number of gears on sun, ring and planetary gears in each gear train.
29-1 INTRODUCTION
A gearbox is a device employed to provide variable speeds, depending upon the requirement of variable speed and torque, as the load on cutting tool changes (in a manufacturing machine), or load on gear wheels on road (in automobile), a device is employed to provide variable speeds. A discussion on gearboxes used in machine tools is beyond the scope of this book. In ...
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