The following are the critical dimensions and geometries concerned with toothed gear: Pitch Circle : A pitch circle is an apparent circle in which two gears can be taken like smooth cylinders rolling without friction. Addendum Circle : The addendum circle is the …

The screw thread is a continuous helical groove of specified cross-sections produced on the external or internal surface. A screw thread formed on a cylinder is known as a straight or parallel screw thread, while a screw thread formed on a cone or frustum is known as …