Chap, 5.2 The fundamental law of gearing(4) 2. The involute Tooth form What is the involute? How does the involute form? The involute curve is the path traced by a point on a line as the line rolls without slipping on the circumference of a circle. It may also be defined 发生线 as a path traced by the end of a 渐开线 string which is originally involute B wrapped on a circle when the 6 string is unwrapped from the circle. The circle from which the involute is derived is called Base circle the base circle2. The Involute Tooth Form The involute curve is the path traced by a point on a line as the line rolls without slipping on the circumference of a circle. It may also be defined as a path traced by the end of a string which is originally wrapped on a circle when the string is unwrapped from the circle. The circle from which the involute is derived is called the base circle. Chap.5.2 The fundamental law of gearing(4) What is the involute? How does the involute form? involute Base circle