Monday, January 16, 2017

Scroll Saw Bowls with Segmented Feature Ring

A year ago my wife gave me an interesting book on how to make bowls without a lathe. At that time I did not have a wood lathe and the prospect of making bowls without creating mounds of wood shavings intrigued me.
Carole Rothman Uses a Scroll Saw to Make Her Bowls 

Carole Rothman has developed techniques that transform flat boards as wide and long as the dimensions of the piece into incredibly beautiful bowls. One drawback: these bowls typically have sides that are around 45 degrees. 

I like to make things that are useful and have been planning to make a series of sturdy bowls for chopping vegetables and nuts so that the process doesn't send pieces all over the place. My wife's mother had a very functional wooden bowl and chopping knife that she used many decades.  The bowl was shallower than the one pictured above so, in order to use a scroll saw, I had to modify the technique. 
Mother-in-Law's 12.5 Inch Diameter Bowl and Chopping Knife
My first attempt used two boards of hard maple to make the bottom four layers of a bowl. Turning a solid piece of wood involves slicing through the grain at various angles. It is much easier to cut "with the grain" than "across the grain". The woodworking group I belong to introduced me to segmented bowl techniques and the advantages of creating layers that have no "end grain". For the fancy top layers, I added feature rings of trapezoids.
First Chopping Bowl with Cherry Feature Ring on Top of Four Layers of Maple
Side View of First Bowl

Two Handled Chopping Knife, Handles Cover Blade When Not in Use
Second Bowl with Cherry Feature Ring and Pine Separators
Top View: Second Bowl Showing Trapezoids and Separators
Second Bowl Complete

Discs on Left Have Been Cut Out of a Square Board at 45 Degrees. They Will Be Cut Again to Make Layers #2 and #4 of Two Bowls.  Stacked Discs on Right Are Layers #1 and #3 of Those Bowls.
The Four Bottom Layers of a Bowl

Glued Up Stack of Four Layers of Yellow Birch

Feature Ring: Alternating Trapezoids of Walnut and Cherry

Feature Ring Added to Four Layers of Yellow Birch
Chopping Knife with Leather Cover

Bottom View of Chopping Bowl #3

Top View of #3

Top View of #4: Yellow Birch Layers 1-4, Alternating Trapezoids of Cherry and Oak, with Purple Heart Separators

Bottom View of Chopping Bowl #4

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