Figure 16-4.--Bend allowance less than 90 degrees.
process is shown in figure 16-4 and in the following
NOTE: All dimensions and points for the
following exercise are taken from figure 16-4. In this
step-by-step exercise. Before continuing with this
figure, a scale of 1 inch = 12 inches is used.
exercise, you will need a tangent table (table 16-l),
compass, straight edge, calculator, protractor, paper,
1. Find the center of the bending circle by drawing
and a pencil.
line DE down at a right angle from any point on line AB
16-4