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 to one side of the required line on the part that is
to be cut-away. Bring the other point to the stock and see if it touches
the line first made. If not, move the first point until the two points
track in the same line.

[Illustration: Fig. 18.]

The rest should be set at the exact center for measuring.

All measurements on the edge of the stock can be made with pencil and
rule as in cylinder turning.


B-I--2-a. Shoulder Cuts

1. EXTERNAL SHOULDERS. FIG. 18. The surplus stock at each successive
shoulder is roughed out with a 3/4" gouge, keeping well outside the
finished measurements. The gouge for this work is held in the same