Law of toothed gearing – Involutes and cycloidal tooth profiles –Spur Gear terminology and
definitions –Gear tooth action – contact ratio – Interference and undercutting. Helical, Bevel, Worm, Rack and Pinion gears
3. Circular pitch (Pc)
• It’s a distance measured along the
circumference of pitch of the pitch circle from
a point on one tooth to the corresponding on
the adjacent tooth