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artful bodger
1st January 2019, 06:41 PM
Yesterday I rough turned four large blackwood bowls.
Today, had high hopes of repeating the task.
It was not to be. A lapse in concentration meant that the foot/tennon of bowl number 1 for the day was turned with no allowance for future shrinkage with the particular chuck jaw set intended for the job. The foot diameter is 180mm and any smaller might draw criticism from folk (other turners) who are banana sensitive:wink:.
You can see in the picture that the chuck is not far from being fully closed on the foot.
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So decided to finish turn this number green.
Diameter of bowl is 510mm and height is 120mm.
Wall thickness is 16mm.
Was surprised how relatively easy the outside sanded with minimal clogging of paper.
Inside was a different story.
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You can see on the underside the chuck jaws have caused a bit of discolouration on the foot due to wanting to rust with the wet timber. That will have to be hand sanded out later. Or not.
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The vertical lines on the lower left of the above picture is where the centrifugal force has cause moisture to work its way out while turning the inside of the bowl. Will see how it looks in a day or two and if need be lightly sand again on lathe.
Now just have to hope it behaves itself drying out.
There is nice grain in it, photo does not really do it justice. It should look sweet with a bit of lacquer if it dries ok.
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Finally a picture of the queue jumper with the rough turned ones from yesterday.
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tony_A
1st January 2019, 09:48 PM
Thats a really nice looking bowl AB. What beautiful piece of timber.

Tony

Paul39
2nd January 2019, 03:28 AM
Artful,

It will most likely dry oval or funny and will rock on the foot. Sand the foot flat on the bottom and call it done. Nice shape and beautiful figure. When I have accidentally made the foot too small to grab, I have carefully wound layers of masking tape around it to make it big enough.

I have made a 5 - 6 inch padded piece that I grab with a chuck and put against the inside of a bowl held in place with the tail stock. I use that to finish natural edge or warped bowl bottoms. I usually leave just a prick in the center bottom from the cone and point tail center so that I can find the center again. I turn, sand, and finish everything on the bottom of the bowl, leaving the nub under the center, then remove the nub with a bench chisel and hand sand and finish.

Richard Raffan has described a round bottom bowl in one of his books, you could do that.




The foot diameter is 180mm and any smaller might draw criticism from folk (other turners) who are banana sensitive:wink:.

Other turners may go butt a stump. If it pleases you and the buyer or receiver of a gift, that is all that counts.

Explain banana sensitive to this yankee. I did find banana bender here: Meanings and origins of Australian words and idioms | ANU School of Literature, Languages and Linguistics (http://slll.cass.anu.edu.au/centres/andc/meanings-origins/all)You have a treasure of beautiful timber. Happy new year.