David Castonguay
02-21-2020, 3:56 PM
Hi folks:
I'd greatly appreciate some help with diagnosis of the cause of these cracks and prevention of cracks in the future.
BACKGROUND
I've been turning for 1.5 years in my spare time. Produced about 30 bowls of various sizes from blanks source from my firewood pile. All of them have been turned green to final dimension. The wood has been beech, maple, ash, white birch and ash (black and white). Many of the logs have been spalted.
The small to medium bowls (4 to six inches) have been relatively free of cracks. Recently,I turned a couple of bigger bowls (10 to 11 inch diameter; 5 to 6 inch tall) in a similar shape. The walls are about 1/4 inch thick and at the base the curve produced about 3/8 to 1/2 inch thickness.
The black ash bowl developed some small cracks along the bottom in the sapwood. (pictures attached). The cherry bowl turned in approximately the same size and shape did not crack. The cherry came from a diseased tree with some imperfections that I think may have come from a fungus or insect infestation. Both trees had been cut down for about a year.
Your advice is greatly appreciated.
David
426425426426426427426428
I'd greatly appreciate some help with diagnosis of the cause of these cracks and prevention of cracks in the future.
BACKGROUND
I've been turning for 1.5 years in my spare time. Produced about 30 bowls of various sizes from blanks source from my firewood pile. All of them have been turned green to final dimension. The wood has been beech, maple, ash, white birch and ash (black and white). Many of the logs have been spalted.
The small to medium bowls (4 to six inches) have been relatively free of cracks. Recently,I turned a couple of bigger bowls (10 to 11 inch diameter; 5 to 6 inch tall) in a similar shape. The walls are about 1/4 inch thick and at the base the curve produced about 3/8 to 1/2 inch thickness.
The black ash bowl developed some small cracks along the bottom in the sapwood. (pictures attached). The cherry bowl turned in approximately the same size and shape did not crack. The cherry came from a diseased tree with some imperfections that I think may have come from a fungus or insect infestation. Both trees had been cut down for about a year.
Your advice is greatly appreciated.
David
426425426426426427426428