on a nut driver with a handle diameter of 1.5 inches is used to install a .25-20 UNC bolt into a robotic arm. What is the circumference where the effort is applied.
If you want the circumference of the nut driver's handle, then it's very simple:
Circumference=Diameter X Pi
=1.5 X 3.141592653=4.7123889795 inches.
