This
area is near and dear to me. Most of my lathe
experience has been in spindle turning. My first
lathe had a mere 2½" clearance between the
center and the ways (the bed). This really
limited the me to tiny bowls and it seemed to me
that you had an extremely limited range of ideas
for turning nice usable bowls. Since then, I have
purchased a much larger lathe, with a 7"
clearance, and I have discovered that techniques,
such as off-center turning, can provide limitless
ideas. Still, spindle turning has always been my
greatest passion and led to my Magical Wand
businness in The Old Traders Wand Shop.
This lesson starts you off into the world of
spindle turning.
Spindle turning is the term applied to all work
done on a lathe in which the stock to be worked
upon is held firmly between the live and dead
centers. There are two methods in common use in
wood turning: first, the scraping or
pattern-makers' method; and second, the cutting
method. Each has its advantages and
disadvantages, but it is necessary that both be
learned in order to develop a well rounded
turner. Care should be exercised, however, that
each method be used in its proper place. The
first is slower, harder on the cutting edge of
tools, and less skill is required to obtain
accurate work; the second is faster, easier on
the cutting edge of tools, and the accuracy of
results obtained depends upon the skill acquired.
As skill is the one thing most sought for in
lathe work, the use of the cutting method is
advocated entirely for all spindle turning and,
with but few exceptions, for face-plate and chuck
turning.
TO CENTER YOUR STOCK
If the wood to be turned is square or rectangular
in shape, the best way to locate the center is to
draw diagonal lines across the end of the stock
corner-to-corner to make an X. The point of
intersection locates the center. If it is round,
you can 'eyeball' your best guess then adjust it
once you start to secure it on the lathe.
Your work will be a lot easier if you resaw any
rectangular stock to a square first (unless you
are going to do some off-center turning too).
Another helpful process is to cut the square
edges off the stock turning it into an octagonal
stock rather than square. You will have a much
easier time rounding it out. Mark the center
before you do this.
CLAMPING THE STOCK IN THE LATHE
Take the live center from the spindle and with a
wooden mallet drive the spur deep into the wood. Never
drive the wood onto the live center while in the
spindle because serious injury may be done the
machine by such practice. When
extremely hard wood is being used, it is a good
practice to make saw cuts along the diagonal
lines and bore a hole at the intersection, thus
allowing the spur to enter the wood more freely.
Wax the other end of the wood where it will be
turning on the dead center (even if it has
bearings).
Now, replace the live center by taking the stock
and center and forcing it into the spindle by a
sudden push of the hand. The tail stock is then
moved about ½" to 1" from the end of
the piece to be turned, having the tail spindle
well back in the tail stock. The tail stock is
then clamped to the bed. Turn the tail stock hand
wheel until the wood is held firmly. WorkTurn the
live center by hand at the same time, so that the
cup, or dead center, will be forced deeply into
the wood: so deeply that the live center will not
continue to turn. Now turn the dead spindle back
until the live spindle begins to turn freely and
clamp the dead spindle fast.
ADJUSTING THE TOOL REST
Horizontally the tool rest should be set about
1/8" from the farthest projecting corner of
the wood and should be readjusted occasionally as
the stock diminishes in size. The vertical height
varies slightly according to the height of the
operator. It is even with the center of the
spindle for a short person; 1/8" above for a
medium person; and ¼" above for a tall
person. So long as the stock is in its square
form the tool rest should never be adjusted while
the machine is in motion as there is danger of
the rest catching the corners and throwing the
stock from the machine. Also see that everything
is clamped tightly before starting the lathe.
POSITION OF THE OPERATOR
The operator stands firmly on the floor
back far enough from the lathe to allow
him to pass the tools from right to left
in front of his body without changing the
position of the feet. It may be found
convenient to turn slightly, bringing the
left side of the body a little closer to
the lathe. In no case, however, should
the tools be brought in contact with the
body as the cutting operation from right
to left should be accomplished by a
movement of the arms alone and not the
swaying of the body. (See pic)
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. (See pic) |
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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 later lessons.
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