Recently, I saw Sören Berger turn a scoop. He made it look easy and indeed it is — after you’ve completed one.
This cedar scoop combines elements of spindle turning, multi-axis turning, and bowl turning.
It also includes turning a perfect sphere. A perfect sphere is no problem for me, I have that process down. The difference is that this sphere must be on the end of a handle. I cannot rotate the ball’s axis as I can for an independent sphere.
Soren marked out first for a octagon, then rounded it over for a ball. However, he used his single purpose caliper to make critical measures for the octagon.
I don’t have his caliper – nor do I want a single purpose tool. However, the geometry is simple. I created a spreadsheet to related diameter to critical measures for the octagon. BTW, the length of a side of a polygon is 0.414 times the diameter. My spreadsheet can be downloaded here.
My scoop is Titan cedar about six inches long with a 2.5 inch diameter bowl, finished with mineral oil and beeswax.