Justin Stephen
12-24-2014, 10:43 AM
I'm sure I am not the first to try this but I don't recall ever seeing anyone else post this design so I thought I'd drop it here in case anyone wants to try it.
I created a 10 1/2" board of 1/2" strips of maple and walnut but then resawed it and planed it down to two 1/4" boards. I cut alternating concentric rings 1" at 45 degrees on a scroll saw, cutting from one board on the whole inch and the other on the 1/2 inch so that there was an overlap of about 1/2" between each stacked ring. By cutting at 45 degrees, I increased my working room to about 3/8" versus the 1/4" I would have had if I cut the rings at 90 degrees. Rough drawing (ignore that little bit in the middle):
302635
Of course, the 3/8" assumes perfectly cut rings and perfect gluing, neither of which ever happens in my shop. http://segmentedwoodturners.org/forum/images/smilies/smile.png
By using this designed, I obviously ended up with a very tight checkerboard pattern but I also ended up with a much more open form than would normally be achieved with a bowl from a board.
302636
302637
I didn't nail the outside curve well at all and there was a little bit of chipout on the inside where the wall meets the base, but it was good enough to gift to a relative for xmas. This design also requires more than the usual amount of sanding between rings to avoid gaps. Final dimensions were about 10 1/2" wide by 4 1/4" tall, turned to between 1/8" and 3/32". Finish was 3 coats of sealer and 3 coats of WOP, if memory serves.
I created a 10 1/2" board of 1/2" strips of maple and walnut but then resawed it and planed it down to two 1/4" boards. I cut alternating concentric rings 1" at 45 degrees on a scroll saw, cutting from one board on the whole inch and the other on the 1/2 inch so that there was an overlap of about 1/2" between each stacked ring. By cutting at 45 degrees, I increased my working room to about 3/8" versus the 1/4" I would have had if I cut the rings at 90 degrees. Rough drawing (ignore that little bit in the middle):
302635
Of course, the 3/8" assumes perfectly cut rings and perfect gluing, neither of which ever happens in my shop. http://segmentedwoodturners.org/forum/images/smilies/smile.png
By using this designed, I obviously ended up with a very tight checkerboard pattern but I also ended up with a much more open form than would normally be achieved with a bowl from a board.
302636
302637
I didn't nail the outside curve well at all and there was a little bit of chipout on the inside where the wall meets the base, but it was good enough to gift to a relative for xmas. This design also requires more than the usual amount of sanding between rings to avoid gaps. Final dimensions were about 10 1/2" wide by 4 1/4" tall, turned to between 1/8" and 3/32". Finish was 3 coats of sealer and 3 coats of WOP, if memory serves.