Figure 2-16.Proper method of cutting with snips.
edge will result. Cut circular sections from the right
side (fig. 2-17).
When making internal circular cuts, you make a
small opening near the center of the opening, insert the
snips, and cut from the upper side, gradually
increasing the radius of the cut until the opening is
completed (fig. 2-18).
Large sheet-metal sections are cut on SQUARING
SHEARS that are discussed later in this chapter.
The COMBINATION NOTCHER, COPER, and
SHEAR (fig. 2-19) is ideal for notching corners or the
edge of sheet metal. The blades are adjustable for
conventional notching or for piercing, starting inside
PORTABLE POWER SHEARS make it possible
to do production work. They are designed to do
straight or circular cutting (fig. 2-20).
Small diameter openings can be made with a
SOLID PUNCH (fig. 2-21) or a HOLLOW PUNCH
Figure 2-17.Making a circular cut.
Figure 2-18.Making an internal circular cut.
Figure 2-19.Combination notcher, coper, and shear.
(fig. 2-22). Locate the position of the hole; select the
correct size punch and hammer; then place the metal
section on a lead cake or on the end grain of a block
of hard wood (fig. 2-23). Strike the punch firmly with