Click image for enlarged view |
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The outer edge of the bill at final thickness
of about 3/32”. When you stop the lathe the flat edge of the wood itself
will give you a visual indicator of the thickness.
You need to maintain the 3/32" thickness (or slightly less) throughout
the entire cap to allow for bending and shrinking without cracking.
Variations
of
thickness in the bill will be most noticable to the eye in the finished
cap but maintain a constant thickness while turning the entire
cap. |
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Thin the bill a step further and check
the thickness before proceeding toward the center with any more cuts. |
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Keep thinning the bill area. |
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Sand the bill with the lathe stopped. Remember
just spend time sanding the bill you will keep. |
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Now the tailstock can be slid back and the cone of
wood removed that was used for support. |
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I have reversed my lathe rotation to make it easier
for hollowing. The chuck on the Oneway lathe locks to the spindle with
set screws for safe reverse turning. |
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Wetting the wood with water will make it
easier for a light to shine through to help gauge the thickness as
the cap is hollowed. Remember to maintain a consistent thickness of
3/32" or slightly less throughout the entire cap.
Using a light is not necessary for completing a cap. The sides of
the cap can be measured with most any 6" caliper with the lathe stopped.
Turn the inside to final thickness in small steps, measure and then
proceed another step toward the center. Any color wood, wet or dry,
can be turned in this fashion to produce a thin walled bowl if you
have calipers that can reach from the rim to the bottom. |
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Cutting from the bill to the center with
the gouge flute facing the direction of cut. |
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The light shinning through the wet end
grain area of the wood. |
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Check the thickness and proceed with hollowing.
When turning irregular edged pieces like this cap or a natural edge
bowl always stop the lathe before repositioning the tool rest. This
picture shows the wings of the turning are closer to the tool rest
banjo than
the
center
section where the cutting is taking place.
Any time
you
adjust
the
tool
rest make sure and rotate the wood by hand to see that it clears the
upright section of the banjo before you turn the lathe on. |