ht to left should be
accomplished by a movement of the arms alone and not the swaying of the
body. (Fig. 3.)
HOLDING THE TOOLS
All tools should be held firmly but not rigidly. The right hand should
grasp the handle at the extreme end for two reasons: first, to give as
much leverage as possible so that the tool will not be thrown from the
hands in case it should catch in the wood; second, a slight wavering of
the hand will not cause as much variance in the cuts as when held closer
up to the rest. The left hand should act as a guide and should be held
over the tool near the cutting edge. The little finger and the back part
of the palm of the hand should touch the tool rest thus assuring a
steady movement. The left hand should not grasp the tool at any time.
(Fig. 3.)
USE OF THE TOOLS IN SPINDLE TURNING
The correct use of the various tools used in spindle turning will be
explained in detail as the steps are worked out in the sequence of
operations on the exercises in Section A-I.
CHAPTER V
TOOL PROCESSES IN SPINDLE TURNING
Exercise A-I--1-a. Straight Cuts
1. THE ROUGHING CUT (LARGE GOUGE).
FIG. 4. Place the gouge on the rest so that the level is above the wood
and the cutting edge is tangent to the circle or surface of the
cylinder. The handle should be held well down.
[Illustration: Fig. 4.]
Roll the gouge over slightly to the right so that it will make a
shearing cut instead of a scraping cut. This rolling of the tool will
also throw the chips from the operator.
Then lift the handle slowly, forcing the cutting edge deep enough into
the wood to remove all or nearly all of the corners, at the end of the
work which is being turned. This cut is begun about 3/4" from the dead
center end. Work back another 3/4", moving toward the live center and
make a second cut, and so on until the entire length of the cylinder is
gone over. This method of removing corners should always be followed to
avoid any possibility of breaking a large sliver from the stock, with
consequent danger to the worker.
The tool may then be worked from one end to the other, getting a
fairly-smooth, regular surface, slightly above the diameter required.
However, do not begin on the very edge of the cylinder end. It is better
to begin about 2" from one end and work to the other, and then reverse
and work back.
The tool should also be held at a slight angle to the axis of the
cylinder, with the cutting point always
|