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Palmgren Operating Manual & Parts List

84315

OPERATION (CONTINUED)

•

For cross drilling flat sided work, use a (metal-lathe) drill pad in
the tail stock and place a scrap board between the pad and the
work. For cross drilling round stock, use a (metal-lathe) crotch
center in the tail stock. Large workpieces can be located on
supporting blocks laid upon the lathe bed. They can be held by
hand or can be supported from behind by a drill pad mounted
in the tail stock.

FACEPLATE AND CHUCK TURNINGS

PLANNING THE WORK

Make a layout first, to provide a visual pattern to follow while work-
ing the turning. Pattern can be laid out in the same manner as spin-
dle patterns – or templates can be made which can be held against
the work for visual comparison. Circles to locate the various critical
points (at which the contours of the faceplate take distinct form) can
be quickly scribed on the rotating work by using the dividers.

PLANNING VARIOUS CUTS

The circumference of a faceplate turning is roughed-out and fin-
ished 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 contours which must often be
tuned are illustrated in the accompanying sketch which also shows
the proper chisels for shaping these contours. Any roughing out to
depth is generally accomplished with the gouge held in the scrap-
ing position.

RECOMMENDED SPEED

Always follow recommended speed to do faceplate and chuck
turning depending upon the size and thickness of workpiece.

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 in Figure 59. Be careful to measure
in advance the depth to which drill can be allowed to go.

•

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

″

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 flat nose chisel.

•

Proper support must be provided at all times for the scraping
chisels. Several tool rest positions are shown in the accompany-
ing 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.

FANCY FACEPLATE TURNINGS

PREPARING A PLUG CHUCK

A plug chuck is an auxiliary wood chuck mounted onto a faceplate.
The chuck can be any size diameter, but it should be about 1

″

thick for stability. The wood chuck should be provided with a

″

hole in the center for receiving a tenon turned at the end of

the workpiece.

Figure 58

Figure 56 – Cross Drilling

Use of Template

Spear-Point
Chisel