Figure 2-32.Bar folder.
Figure 2-33.Fold size depth gauge.
3. With the left hand holding the metal, pull the
handle as far forward as it will go. Return the handle to
its original position.
4. Place the folded section on the beveled section
of the blade, as close to the wing as possible. Flatten the
fold by pulling the handle forward rapidly.
BRAKES. Large sheet-metal sections are
formed by using bending brakes. These machines
produce more uniform bends than can be made by
hand and require significantly less effort. The two
most commonly used brakes are the cornice brake and
the finger brake.
A CORNICE BRAKE is shown in figure 2-36.
Two adjustments have to be made before using the
1. Adjust the UPPER JAW or CLAMPING BAR
vertically for the gauge of sheet metal to be bent. The
clamping device holds the work solidly in position,
provided it is correctly adjusted. For example, if the
clamping device is set for 18 gauge sheet metal and you
Figure 2-36.Cornice brake.
Figure 2-34.Wing setting determines the tightness of fold.
Figure 2-35.Making a hemmed edge.