Question

Reduction of body diameter toward shank of a reamer ia known as ?

Answer 1

The correct answer is recess.  

A reamer is a kind of rotary cutting tool used in metalworking. Precision reamers are created to enhance the size of a previously formed hole by a small amount, however, with a greater degree of precision to leave smooth edges.  

Recess refers to the reduction in the diameter of a body towards shank. They assist in the process of better machining using reamers.