Involute Gear Diagram. I chose a pitch diameter p76 mm but obviously you can choose any value. Two involute gears the left driving the right.
The curve most commonly used for gear tooth profiles is the involute of a circle. Involute gear design from scratch. Applications of gears photo of small electric motor removed for copyright reasons.
A point p on this involute can be described by the angle α which is spanned between the straight lines gp and gt.
An involute is constructed by rolling a so called rolling line around a base circle. ψ is the parameter expressing the involute curve and means the angle from start of involute curve when straight line ts is unwound without slipping from the circumference of the. Photo of an elaborate chronometer ref. The curve is generated by the end of a taut line as it is unwound from the circumference of a circle fig.