Standard Involute Profile
How standard involute profile is calculated
External Gear:
■Tip (outside) Radius = Pitch Radius + Module * (1 + Profile shift)
■Foot (root) Radius = Pitch Radius – Module * (1.25 - Profile shift)
■Tooth Thickness = PI * module / 2 + 2 * Profile shift * Module * TAN(Nominal Pressure Angle)
Internal Gear:
■Tip Radius = Pitch Radius – Module * (1 - Profile shift)
■Foot Radius = Pitch Radius + Module * (1.25 + Profile shift)
■Tooth Thickness = PI * module / 2 – 2 * Profile shift * Module * TAN(Nominal Pressure Angle)
■Pitch Radius = module * number of teeth/2