Figure 9-29.--Using an indexing attachment.
be engraved is held in this attachment and may be
indexed for any number of divisions available on the
plate. Figure 9-29 shows a micrometer collar being held
for graduation and engraving.
You will use a forming guide (sometimes called a
radius plate) to engrave cylindrical surfaces. The
contour of the guide must be the exact opposite of the
work; if the work is concave the guide must be convex
and vice versa. Mount the forming guide on the
forming bar. (See fig. 9-29.) When the spindle floating
mechanism is released, the spindle follows the contour
of the forming guide.
Use the rotary table shown in figure 9-30 to hold
work such as face dials. It is similar to the rotary table
used on milling machines. It is mounted directly on the
Figure 9-30.--A rotary table.
9-21