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•
Slide index wheel (Key No. 52) onto armature shaft and secure
index wheel to shaft by tightening set screw (Key No. 51).
The index wheel has one hole and the headstock has 24 equally
spaced holes. The index pin passes through the index wheel hole
and engages with one of the 24 holes and locks the spindle from
turning while you put a mark on the workpiece.
J
To prepare the lathe for outboard turning, use the 19mm
spanner wrench to loosen the hex head bolt under the head-
stock. Rotate the headstock 180 ° and tighten the bolt.
WARNING:
When the headstock is returned to the "inboard"
position, it will be necessary to re-check the center alignment
(see Figure 4).
Figure 14
For example, to locate the position of six flutes on a cylinder:
•
Insert the index pin into the hole in the index wheel and
push it through until it engages one of the 24 holes in the
headstock.
•
Adjust the 12" tool rest to the centerline of the workpiece
and make a mark (see Figure 15).
•
Pull the index pin back and slowly rotate the workpiece
until the pin engages the next hole in the headstock.
•
Repeat this step 24 more times and the workpiece will
have rotated 60° (2.4 ° per hole). Place another mark on
the workpiece.
•
Continue these steps until there are 6 marks on the work-
piece.
•
Bowl turnings or wheel turnings can be marked in the
same manner.
WARNING:
The indexing pin must be disengaged for all
other operations on the lathe.
WARNING:
When operating the lathe with the index wheel
mounted on armature shaft, do not set the speed higher than
400 RPM. Operations at speeds higher than 400 RPM can
loosen the index wheel and result in injury.
Figure 15
OUTBOARD
TURNING
This technique makes it possible to do jobs on this machine
that are too large to mount conventionally. It is straight forward
faceplate turning, except, because of the work size, caution
must be taken and speeds must be restricted to minimums. If
you anticipate doing outboard turning you must use a bowl
turning rest (see Recommended
Accessories,
page 23). The
bowl turning rest can be attached to the lathe bed.
CAUTION:
Do not try to push this support when cutting. Do
not try to mount work so large that the motor must strain to
turn it. If you wish to experiment with this technique, do so
with soft woods. Let the heavier, harder wood come later.
Figure 16
USING
WOODWORKING
CHISELS
SELECTION
OF CHISELS
Better chisels have handles approximately 10" long to provide
plenty of grip and leverage. Sharp tools are essential for clean,
easy work. Select tools that will take and hold keen edges.
GOUGE
SKEW
PARTING
TOOL
SPEAR
POINT
FLATNOSE
ROUND
NOSE
Figure 17 -The Six Commonly Used Chisel Types
THEORY OF TURNING
The two classes of chisels are those intended primarily for
cutting, and chisels used only for scraping.
•
The cutting chisels are the gouge, skew and parting tool.
These are the most used. They are commonly sharpened
to a razor edge by honing on both sides.
•
The scraping chisels are the flatnose, round nose and
spear point. These are not honed on the flat sides - the
wire edges produced by grinding are left on to aid in the
scraping process.
Cutting Chisel
Scraping Chisel
Figure 18
Cutting and Scraping
•
To cut, the chisel is held so that the sharp edge actually
digs into the revolving work to peel off shavings.
•
To scrape, the chisel is held at a right angle to the work sur-
face. This tool removes fine particles instead of shavings.
8
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