What is the minimum thickness of a bowl block where coring could be considered?😕
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coring
- Thread starter cwearing
- Start date
john lucas
AAW Forum Expert
If you wanted a shallow bowl 3". You might only get 2 out of that of course and they would be quite shallow.
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Mike Mahoney is currently here teaching classes for our club. On Saturday I attended an all-day program which included coring. He started with a block about three and a half inches thick and wound up with about twelve (or maybe it was four -- I forget) bowl blanks.
He also turned a piece of green elm about ten inches in diameter to make a calabash bowl with a wall thickness of about one millimeter. However, under good lighting, I could see some tool marks.
He also turned a piece of green elm about ten inches in diameter to make a calabash bowl with a wall thickness of about one millimeter. However, under good lighting, I could see some tool marks.
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Honest "engine" -- he did core four bowl blanks and the calabash bowl really was about one millimeter thick.
Not only that, the Jet lathe tool rest base has some sort of design shortcoming that created a problem with not allowing the guide post to go down to where the cutter was on the same level as the centerline. It was about a half inch or more too high. However, he was so skilled at using the coring system that he used a cross-gate configuration to get the cutter at about the right level, but resulting in the tool being rather loose fitting. Despite that severe handicap, he cored out the blanks and did not even attack a handle to the cutter except for the largest coring. We were impressed.
Not only that, the Jet lathe tool rest base has some sort of design shortcoming that created a problem with not allowing the guide post to go down to where the cutter was on the same level as the centerline. It was about a half inch or more too high. However, he was so skilled at using the coring system that he used a cross-gate configuration to get the cutter at about the right level, but resulting in the tool being rather loose fitting. Despite that severe handicap, he cored out the blanks and did not even attack a handle to the cutter except for the largest coring. We were impressed.
I almost always have mine set 1/4 inch plus high. Only problem with it being high is that the vertical blade may not fit in the curved cut, but by the time you get to the center, with the added pressure if the cutting action, it will be right on.
I can take more cores than I actually get. Thing is, with most utility bowls, that last small bowl or two aren't worth the effort, and you end up with a lot of tiny bowls you don't want to sand out.
Mike is a master.
robo hippy
I can take more cores than I actually get. Thing is, with most utility bowls, that last small bowl or two aren't worth the effort, and you end up with a lot of tiny bowls you don't want to sand out.
Mike is a master.
robo hippy