MISCELLANEOUS OPERATIONS
1.
GUIDE BLOCKS FOR SCRAPING
OPERATIONS
A guide block can be clamped to a chisel to
limit the depth of cut and aid the production
of perfect cylinders, tapers and facings on
faceplate turnings. Scraping methods must be
used when the guide block is employed.
it in the headstock, using a 4-jaw (metal-lathe)
chuck or a Jacobs chuck.
When this method is employed, there is no
accurate support for the workpiece so that
centre drilling is difficult. However, cross drilling,
or drilling random holes through stock can be
accomplished quickly in this manner.
For cross drilling flat sided work, use a (metal-
lathe) drill pad in the tailstock and place a scrap
board between the pad and the work.
For cross drilling round stock, use a (metal-lathe)
crotch centre in the tailstock. Work may be
supported on supporting blocks laid upon the
lathe bed, it can be held by hand or can be
supported from behind by a drill pad mounted
in the tailstock.
2.
DRILLING
There are several methods of using the lathe
for drilling centre holes through wood stock.
When the drill is properly mounted, centering
of the hole is automatic. One method is to
mount the drill to the tailstock, while the work is
held and revolved by the headstock. If the drill
has a Morse taper shank, it can be mounted
directly in some tailstock spindles. Otherwise, it
can be mounted in a chuck fitted with the
proper type shank.
Another method of holding the drill is to mount
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Fig. 53
Fig. 52
Fig. 54
