Balancing Natural Edge Bowls Questions and Answere The Pen ...
Balancing Natural Edge Bowls Questions and Answere The Pen ...
Balancing Natural Edge Bowls Questions and Answere The Pen ...
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Axes lengths of the ellipse: 250mm x 200mm.Thickness of the Padouk blank: 36mm. <strong>The</strong> outer diameterof the circular groove is 72mm, fitting the jawsSC67 of the VICMARC-four-jaw-chucks VM90 <strong>and</strong>VM100. <strong>The</strong> drill is made of 2,5mm tool steel sheeting,sawn <strong>and</strong> filedFigure 7 Holding the workpiece with its top inthe VICMARC chuck VM100 on my KREHER-Lathe (see www.cw-kreher.de) <strong>and</strong> round-turningof the bottom, to a thickness of about 30mm, witha parabolic transition from round to oval, theresulting rim is of unequal thickness.Figure 5. Volmer-Ovalturning-Lathe(Ovaldrehmaschine) ODM30 with VICMARCfour-jaw-chuckVM100 <strong>and</strong> jaws SC 67, adjustedfor 50mm axis-difference <strong>and</strong> for 2.2kg mass ofthe chuck <strong>and</strong> blank. Safety cover dismantled.<strong>The</strong> turning could also be done using theSteinert?picOval, the VICMARC-OvalchuckVOD300 or a classical oval chuck.Figure 8. Turning of a recess of 75mm diameter<strong>and</strong> 5mm depth, then s<strong>and</strong>ing of the bottom.Figure 6. Turning the flat oval upper side witha small bead along the edge <strong>and</strong> a cylindricalrim. Axes lengths of the border ellipse: 235mm x185mm.[Continued on Page 20.]More Woodturning June 2010 Page 19
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