# truncated teardrop countersink

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## truncated teardrop countersink

 Anybody know how to model this? The hole and the counter-bore are truncated tear drops. How do I join them with a 45 degree countersink that is also tear dropped? It would be a loft operation in CoCreate. fixing-block.png (19K) Download Attachment
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## Re: truncated teardrop countersink

 Perhaps an inverse of the hole, and countersink can be made using 3d convex hull? and then subtract that from the block? Regards Giles On 29 September 2011 22:23, nop head <[hidden email]> wrote: > Anybody know how to model this? > > The hole and the counter-bore are truncated tear drops. How do I join > them with a 45 degree countersink that is also tear dropped? > > It would be a loft operation in CoCreate. > > _______________________________________________ > OpenSCAD mailing list > [hidden email] > http://rocklinux.net/mailman/listinfo/openscad> >
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## Re: truncated teardrop countersink

 Does this look right? rotate([0, -90, 0]) intersection() {         union() {                 cylinder(r1 = 0, r2 = 10, h = 10);                 intersection() {                         rotate([45, 0, 45]) cube(20);                         rotate([45, 0, -45]) cube(20);                         rotate([0, -45, 0]) translate([0, -10, 0]) cube(20);                 }         }         cube(20, center = true); } On Thu, Sep 29, 2011 at 2:30 PM, Giles Bathgate <[hidden email]> wrote: > Perhaps an inverse of the hole, and countersink can be made using 3d > convex hull? > and then subtract that from the block? > > Regards > > Giles > > On 29 September 2011 22:23, nop head <[hidden email]> wrote: >> Anybody know how to model this? >> >> The hole and the counter-bore are truncated tear drops. How do I join >> them with a 45 degree countersink that is also tear dropped? >> >> It would be a loft operation in CoCreate. >> >> _______________________________________________ >> OpenSCAD mailing list >> [hidden email] >> http://rocklinux.net/mailman/listinfo/openscad>> >> > _______________________________________________ > OpenSCAD mailing list > [hidden email] > http://rocklinux.net/mailman/listinfo/openscad>
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## Re: truncated teardrop countersink

 keep in mind that teardropping the countersink is purely aesthetic. If the countersink angle is 45 degrees, it won't create an overhang angle steeper than that.