Figure 12-79.--Stakes and stake holder.
The stakes are held securely in a stake holder or stake
plate (fig. 12-79) that is anchored in the workbench. The
stake holder contains a variety of holes to fit a number
of different types of stake shanks.
Stakes are not delicate, but they must be handled
with reasonable care. They must not be used as backing
when you are chiseling holes or notches in sheet metal,
or when you are performing any other job that might
damage the face of the stake.
The forming of a cone on a blowhorn stake is
illustrated in figures 12-80 and 12-81. Figure 12-82
shows the forming of a bail (or handle) on a stake.
In forming sheet metal, you will often find it best
to use a combination of several machines and some
hand tools, rather than to do the whole job on any one
machine. To form a cylinder with a grooved lock scam,
for example, you would most likely use a brake, a
slip-roll forming machine, a hand groover, and a hollow
mandrel stake. The procedure for making a cylinder
using these machines and tool is as follows:
Figure 12-80.--Malleting a cone on a blowhorn stake.