Another bowl, which started out as a blank I picked up at a meeting of the Gloucestershire Association of Woodturners a few weeks it ago. After turning the square blank round and pouring some superglue into a faint crack, it looked like this:
then after a while it looked like this:
Note the lack of any tenon or pocket - I decided to try preparing the base in its entirety (give or take some very light skims later) before hot-melt gluing on the sacrificial bit...
...which got a tenon turned on the end.
My plan had been to use this as a test piece for an alternative way of holding it for tenon-removal (in the form of a friction fit with tailstock support holding it against a soft pad) but having seen how lovely the wood looked after turning the bowl, I wimped out and used the Cole jaws.
I'll try the friction hold on another practice piece soon as I've got a big (280 mm diameter, 75 mm thick) Ash bowl blank I want to turn into a fruit bowl and given that it only just fits on the lathe, it'll be far too big to be able to use the Cole jaws. Practising on something smaller seems a sensible approach before risking the big blank.
Anyway, waffle over, here's what the Spalted Beech one looks like after its first coat of hard wax oil:
Side view to show the profile:
This bowl worked my home-made lathe a little hard - the spalting is very soft and hence the bowl was quite ill-balanced when running on the lathe (even after turning). This is the disadvantage of having a box section lathe rather than a big lump of cast iron: at high speeds the lathe (and bench!) would vibrate quite a bit. It wasn't too much of a problem though: I just had to keep the speed below 1000 rpm (and I stopped a couple of times to flood some more superglue into the softer area as it seemed to need it to prevent tear-out).