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Idiomas disponibles
PLANNING VARIOUS CUTS
The circumference
of a facepalte turning is roughed-out and
finished in the same manner that a spindle is worked.
Practically all of the balance of the operations, however, are
done by using scraping methods. A few of the standard con-
tours which must often be tuned are illustrated in the accom-
panying sketch which also shows the proper chisels for shap-
ing these contours. Any roughing out to depth is generally
accomplished
with the gouge held in the scraping position.
Use of Template
Spear
Skew
Nose
Nose
FANCY FACEPLATE TURNINGS
PREPARING A PLUG CHUCK
A plug chuck is an auxiliary wood chuck mounted onto a face-
plate. The chuck can be any size diameter, but it should be
about 1 1/2" thick for stability. The wood chuck should be pro-
vided with a 3/4or 7/8"hole in the center for receiving a tenon
turned at the end of the workpiece.
\
/
Figure 61
Round Nose
Chisel
Figure 58
Spear-Point
Chisel
Measuring
Depth
Once made, such chucks are permanent useful fixtures for
turning balls, goblets, etc. In use, the wood stock for turning is
turned between centers to produce a tenon at one end which
will be a driving fit in the hole of the chuck. When mounted in
the chuck, the workpiece is substantally
supported for any
faceplate type of turning.
DEEP RECESSES
•
The first step is to remove as much wood as possible by
boring into the center with the largest wood bit available.
This can be accomplished
as illustrated, or in any of the
ways shown on pages 11 and 12. Be careful to measure in
advance the depth to which drill can be allowed to go.
Figure 59 - Boring to Depth
Now, remove the bulk of the waste (to rough-out the
desired recess) by scraping with the round-nose chisel or
the gouge. Remove up to within 1/8"of finished size in this
manner. Finish off the inside circumference
by scraping
with the spearpoint chisel or skew. Smooth the bottom of
the recess by scraping it flat with the flatnose chisel.
Proper support must be provided at all times for the scraping
chisels. Several tool rest positions are shown in the accom-
panying illustrations. Always endeavor to position the part of
the rest that supports the tool as close to the working surface
as possible. The depth and squareness of the sides of the
recess can be quickly checked by holding one of the straight
sided chisels and a combination square as shown.
Figure 60
Figure 62
TURNING CYLINDERS
Stock for cylinders should be mounted on the screw center or
a small faceplate. The tailstock can be brought up to support
the work while the circumference
is being turned and finished.
Afterwards, the tailstock is backed off and the outer end of the
cylinder is recessed, using methods already described for
making deep recesses.
•
After making a recess at least 1/2of the way through the
workpiece, and finishing this on the inside, remove the
workpiece from the lathe.
•
Now mount a short length of softwood stock on the screw
center and turn this down to form a dowel that will be a
tight press (not driving) fit inside the recessed end of the
cylinder.
•
Mount the cylinder on this wooden chuck, and recess the
unworked end deep enough to form a perfect hole through
the entire cylinder.
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Figure 63
RECHUCKING
Rechucking is the general term used to describe any addition-
al work mounting that is necessary to complete a turning pro-
ject. The method of working cylinders, and the use of a plug
chuck as already described are typical examples. Another
good example is the rechucking of a bowl.
• The work is mounted on a wood backing block secured to
the large faceplate and it is turned in the usual manner. All
surfaces are cut except the back side (which is against the
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