ENGINEER 1C03 Study Guide - Quiz Guide: Vehicle Identification Number, Gear

• School: McMaster University
• Department: Engineering (General)
• Course: ENGINEER 1C03
• Professor: Thomas Doyle

Document Summary

Diametral pitch, pd is the ratio of the number of teeth to the pitch diameter. It can be measured in teeth per inch or teeth per centimeter. Pitch circle is a circle centered on and perpendicular to the axis, and passing through the pitch point. Module, is a scaling factor used in metric gears with units in millimeters whose effect is to enlarge the gear tooth size as the module increases and reduce the size as the module decreases. Therefore d(diameter of larger spur gear) = 50, d(diameter of smaller spur gear)=20. Therefore d(diameter of larger spur gear) = 100, d(diameter of smaller spur gear)=40. 7)gear ratio = 10/20 = 0. 5 vout/tin = vin / tout v out = 100 x 10/20 = 50 rpm. Input speed = 100 rpm (clockwise), output speed = 100 x 0. 5 = 50 rpm(anticlockwise) therefore the larger spur gear is 2 times slower than the smaller spur gear as shown in the graph.