Course No. 61
Gears and Gearing – Gear Ratios
Identification of drive, driven gears and shafts; idler gears and their uses; direction of rotation and speed of rotation; formulas for gear ratio and speed ratio; how to determine ratios for sets and trains of gears; how to change gears; identification, use, and selection of proper set; multiple reductions; and calculation of gear ratios, speed ratios, speeds, and number of teeth in multiple gearing.
Prerequisites: Ability to perform simple arithmetic calculations and to read simple engineering drawings. Basic knowledge of spur gears