removed, and then changed to first speed.
2. CALIPERING FOR DIAMETER. The true diameter is then calipered the same
as in spindle work.
3. SMOOTHING CUT. A smoothing cut is taken with a skew chisel the same
as in spindle work.
[Illustration: Fig. 15.]
4. ROUGHING CUT ON THE FACE. (3/4" GOUGE.) FIG. 15. The rest is now
placed parallel to the bed of the lathe and slightly above the center of
the spindle. Place the gouge on the rest on its edge with the grind
toward the stock and parallel to the face to be surfaced. The nose of
the gouge is the cutting point.
The handle is then raised and the cutting point is forced toward the
center. A very thin shaving should be taken. If the gouge is allowed to
roll back so the grind above the cutting point comes in contact with the
wood it is sure to catch and gash the wood.
5. SMOOTHING THE FACE. (SMALL SKEW CHISEL.) FIG. 16. For all work up to
3" in diameter, the surface may be smoothed by using a small skew chisel
in the same manner as in squaring the ends of Stock in cylinder work.
(Step 6--Exercise A-I--1-a, Straight Cuts.)
For larger work, place the chisel flat on the rest with the toe next to
the stock and the back edge of the chisel parallel to the face to be
surfaced.
The point of the chisel is then forced toward the center of the stock,
using the straight back of the tool as a guide against the finished
surface. Only a very thin cut should be taken at a time.
[Illustration: Fig. 16.]
Note:--While this operation may be termed a scraping cut, it will be
found to be much easier on the tool than if the cutting edge were held
flat against the work as in other scraping cuts.
The surface of the work should be tested for squareness by holding the
edge of the chisel or a straight edge across the face.
LAYING OFF MEASUREMENTS
In laying off measurements on the face of the stock a pencil compass or
dividers should be used. Set the compass or dividers to one-half the
diameter of the circle wanted. While one point is held at the exact
center of the stock, which is easily located while the stock is
revolving, the other is brought in contact with the revolving stock
until a circle of the correct diameter is marked.
[Illustration: Fig. 17.]
Should the center of the stock be cut away, rendering this method
impossible, the following method may be used: Set the compass or
dividers to the exact diameter wanted. Place one point in contact with
the stock a little
|