Delta 46-715 Manual De Instrucciones página 14

CUTTING A SHOULDER
Use the parting tool first to reduce the wood to within 1/16" of
the required shoulder and diameter (Fig. 43). Clean the waste
stock out with the gouge (Fig. 45A), then use the skew for the
actual cutting of the shoulder (Figs. 45A and 45B), which is
a duplication of squaring an end. The skew then makes the
horizontal cut, but in a different manner from plain cylinder
work. If the shoulder is long, use the ordinary skew position
for the outer portion of the cut. Move the chisel in at the angle
shown in Fig. 45B. In this position, raise the handle of the
chisel slightly to allow it to cut while the tool moves along the
rest. Use a very light cut to produce smooth work. The heel
of the skew can be used for making the entire cut, if desired,
but the cut, whether in this position or any other position,
should not be picked up directly at the end of the stock.
Horizontal cuts started directly from the end of the work will
have a tendency to bite into the wood, often ruining the entire
piece. Always run off the end and not into it. Where a very
short shoulder makes this impossible, use the skew in a flat
scraping position. If the cutting technique is used, engage
only with the heel of skew in a very light cut.
CUTTING SMALL BEADS
Beads can be scraped or cut. Using the spear chisel is the
easiest method of scraping, and works to best advantage
on beads separated by parting tool cuts
is slower than cutting and is not as clean, but it has the
advantage of protecting the work from long gashes.
Cutting beads quickly and accurately with the small skew is
one of the most difficult lathe operations. Various working
methods can be used . The first cut is a vertical incision at
the point where the two curved surfaces will eventually come
together. Make this cut with either heel or toe of skew. Fig.
47 shows the use of the toe. Place the skew at right angles
to the work . Place the chisel flat on its side at the start, and
rotate it evenly through the successive stages of the cut (Figs.
48, 49, and 50). At the same time, pull the chisel slightly
backward to maintain the cutting point. Make the entire
cut with the heel of chisel. The opposite side of the bead is
cut in the same manner, one cut serving to produce the full
shape in each instance. This action produces beads that are
beautifully smooth and polished, and the technique is well
worth mastering.
(Fig. 46). Scraping
14
Fig. 43
Fig. 45A
Fig. 47
Fig. 49
Fig. 44
Fig. 45B
Fig. 46
Fig. 48
Fig. 50