Taper Turning - Craftsman 720.25251 Owner's Manual

D
TAPER TURNING
1
E
Figure 17
B
.q
"_ *-- A
(a)
\1
,,_-A _A
\.! B i
v/ i/ ssA
(c)
Figure 18
With a rounded work piece in the Router Crafter,
loosen wing nut "E" (Fig.. 19)_ With the hex key
provided, !oosen screw "A" and move the center
bushing "B" up about two marks "C" on the tail stock
"D"o Tighten screw "A". Adjust the center screw and
wing nut as instructed in the wood preparation section,
so that the work piece turns freely. With a No._g 26310
Rabbeting Bit, take approximately 1/8 inch cut as was
instructed in the latter part of Rounding Up., The
diameter of the work piece at the tail stock end will
be smaller than the diameter where the bit stopped
cutting We refer to th!s as taper turning.
On the tail stock, there are five graduation marks "C"
ranging from zero to one inch taper over the full length
of the work piece. Fig. 19. With the top edge of the
center bushing "B" positioned directly over the lowest
mark, the center screw "F" would be approximately
in line with the center of the head stock. Turning at
this setting would have zero taper (straight turnings).
Positioning the center bushing over the second mark
would raise the center screw approximately 1/8 inch
above the center of the head stock, thus producing a
taper of 1/4 inch over the length of the work piece.
Moving the center bushing up each additional mark
will increase the taper by 1/4 inch, up to one inch
taper over the full length of the work piece.
The sections on Roping and Straight Beads and Flutes
Cut Lengthwise apply to tapered turnings° If a rope or
straight flute is to be put on a tapered section, the
center bushing must remain on the setting used for the
taper. If the work piece is to have circular beads or
coves, then these should be cut with the center
bushing set on tile lowest mark.,
Refer to Fig. 13 for possible cross section of different
diameters. For example, a 29 inch work piece is to
have a 12 inch tapered section with !2 lengthwise
flutes> The large diameter of the taper is to be 2
Figure 19
inches and the small diameter is to be 1 1/2 inch The
cross section would look like that shown in (c) Fig. 13o
The turning in Fig. 24 was turned as described above°
Turnings in Fig. 25 and 31 have tapered sections.
NOTE: When laying out a work piece on paper,
remember the graduation marks "C" Fig> 19 indicates
the amount of taper that would be produced if the
work piece was turned from the tail stock end to the
head stock end. On all work pieces, the difference
between the largest and smallest diameter, for any
tapered section, will be less than the graduation
mark setting.
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