September 2017
Billy provided the following YouTube links:
Step 1: Prepare a uniform cylinder and mount it on the lathe
Step 2: Mark a centre line for the sphere and then mark out the
radii on either side using the radius of the cylinder
Step 3: Turn down the parts of the cylinder beyond the marks
Step 4: Mark out mid-points on the ends and between the centre-line and the ends
Step 5: Turn down flat to these marks
Step 6: Start curving by eye
Step 7: Use a plastic cup to check curvature repeatedly
Step 8: When satisfied, part off sphere
Step 9: Mount sphere in specially made supporting chucks as shown
Step 10: Continue using the cup test for curvature
Step 11: Sand through all the grades
Step 12: Apply finish of choice
Billy de Klerk starting with a prepared cylinder
Marking out the sphere's radius and diameter (that of the cylinder)
Trim away ends
Start with a "square" cylinder
Mark half-way points
Trim flat
Both sides trimmed
Start rounding by eye
Cup test
Repeated many times
Part off sphere
Mount in prepared supporting chucks
Sand through all grits
Decorate and finish as desired
Andrew Stevens mounts a bowl blank
Shaping the base
Cutting a recess
Trimming the top face
Base of a different bowl
Top view of the bowl