Mechanical Drawing 202 Ep. 1 - Introduction To Involute Spur Gears

This an introductory video to involute spur gears. Knowledge of the involute spur gear is critical for students that are studying Mechanical Drawing and the CAPE Level and onwards. Please observe the following jargons that relates to designing a spur gear:
Root Circle: This is the circle that touches the the bottom land of the tooth spaces.
Base Circle: This is the circle on which the involute form is generated.
Pitch Circle: The pitch circle is an imaginary circle that will contact the pitch circle of another gear when they mesh. The pitch circle will contain the pitch point.
Addendum Circle: This is the circle touching the top land of the teeth. This circle is sometimes called the outside circle.
Fillet Radius: This is the radius of the curve that will join the bottom land of the gear to the gear profile curve.
Top Land: This is the surface at the top of the tooth.
Bottom Land: This is the surface at the bottom of the tooth in between the fillet of two adjacent teeth.
Face: This is the surface of the side of the tooth between the pitch circle and the outside circle.
Face Width: This is the with of the gear tooth and essentially the thickness of the spur gear.
Flank: This is the surface of the side of the tooth below the pitch circle.
Addendum: This is the distance between the pitch circle and the outside circle.
Dedendum: This is the distance between the pitch circle and the root circle.
Tooth Thickness: This is the thickness of the gear tooth measured along the pitch circle.
Tooth Space: This is the distance between adjacent gear teeth measured along the pitch circle.
Diametral Pitch: This is the answer for number of teeth divided by the pitch diameter.
Module: This is the answer for pitch diameter divided by the number of teeth.