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David Springett undercutting tool

Hello,

I have been working with the Springett tools, in conjunction with his WoodTurning Wizardry book. I've been able to make several reasonably good captive cubes, but I've only been able to do so by undercutting the sphere freehand, (without the use of the undercutting tool (Crown)). This leaves a rather imperfect surface on the inside of the sphere. Has anyone used the undercutting tool? Is there a trick to its use? When I use it, I usually shatter the sphere. Will the Springett video help?

Best regards,

CB

Reply to
dustyone
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On Tue, 29 Nov 2011 8:01:39 -0600, dustyone wrote (in message ):

got no qualified answers, just go here. your head will explode in envy. mine did.

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tom koehler

Reply to
tom koehler

I'm not really sure what the Crown Undercutting Tool is, but I'm always used the highest level of the Crown Chinese Ball Tools to undercut the rim when putting a cube inside a sphere or another sphere inside a sphere, as in the Chinese Ball. With the Crown Chinese Ball tools, you are limited to a 2-1/2 inch diameter ball. The advantage of the Chinese Ball Tools is that the handle presses against the outside of the ball and as you move it across the surface of the ball a very clean cut is made on the underside of the outside.

I've been making Chinese Balls since 1998 and have made well over 200 of them. I've also made cubes in a sphere using the one cutter to undercut the outside of the ball.

I hope this helps you a bit.

Fred Holder

Reply to
Fred Holder

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