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Thread: Hollowing and hole boring question

  1. #1
    Join Date
    Jul 2008
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    Palm Springs, Ca
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    Hollowing and hole boring question

    Today I had a part of the day free to do some turning. Before I had to rush around and finish off buying Christmas stuff. So, I put up a large round hunk of Walnut and cut it round the best that I could. Then mounted it up and started truing it up. It started at about 15" diameter and 19" long. However, as i started to turn it at low speed (under 200) I noticed it had a thick amount of sap wood to cut thru. The final diameter turned out to be 9" diameter and 18 1/4 long.
    I ran out of time so, I lightly sprayed it with soap mixture/water and wrapped it with seran wrap and left it on the lathe.

    Question: I use a 2 1/2 - 3" Forestner bit (saw tooth type) usually to bore a hole to depth prior to hollowing but I usually struggle with it because it freezes up as i bore even if I only do a little at at time and pull it out frequently.
    Anybody, out there know a more effective way to bore with the forestner bit method ???? How fast are you drilling at ??

    Ohh and i know some do not do it this way but I perfer using the forestner bit to bore.

    Thanks Dan
    Attached Thumbnails Attached Thumbnails Log-1.jpg   Log-2.jpg   Log-3.jpg  
    Last edited by Dan Mosley; 12-25-2010 at 05:51 AM.
    First you have to learn the rules - Beginner
    Then you have to learn advanced rules - Professional
    Then you disregard the rules - This takes you to the master level................

  2. #2
    Join Date
    Oct 2006
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    ABQ NM
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    A bit that's 2 1/2" to 3" in diameter needs to be very sharp and lubricated to make it through that much end grain. I generally use something more in the 3/4" to 1" range, and if it's end grain I prefer to use a spade bit. (And if I dull it too much I can just toss it.) I generally stay in the 500 to 700 rpm range when drilling on the lathe.

    Like you, I prefer to start with a drilled hole, but I find I can enlarge a 1" hole to 3" with sharp hollowing tools faster than I can drill the 3" hole.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  3. #3
    Join Date
    Jul 2008
    Location
    Palm Springs, Ca
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    I agree the hollowing is faster - I got some other interesting replys on AAW on the same topic - im thinking ill drill down to depth - hog it out by hand down to close to the bottom and then use the saw tooth 3" for the last small bit of hole drilling - ill have to try it and see - I like using the saw tooth bit I have from Irwin it makes a perfect flat smooth bottom every time.
    Thanks..................
    First you have to learn the rules - Beginner
    Then you have to learn advanced rules - Professional
    Then you disregard the rules - This takes you to the master level................

  4. #4
    Join Date
    Jul 2008
    Location
    Palm Springs, Ca
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    1,169

    Hollowing Vessel Thin

    Decided to try out hollowing with the rig I made that uses lighting from the inside. First pc I cut so thin it went thru the wall (see picture #1).
    What did I learn ??......The error I made was not clearing out the chips frequently - they stuck to the inside and I mistakenly thought the area was thick and took another cut to thin it down - it went right thru the side .......on to the firewood pile.....ahhhhhhhhhhhhhhhhh well.........................

    Then on to the next that is a strong 16th but almost see thru (picture #2). I was just playing around to test out the cutting tips and cutters with the light on inside. As far as turning thin "Im over it" I can do it but I like them a bit thicker (see picture #3).
    Attached Thumbnails Attached Thumbnails Cluster-2.jpg   Thin-1.jpg   Cluster-1.jpg  
    Last edited by Dan Mosley; 12-29-2010 at 05:38 AM.
    First you have to learn the rules - Beginner
    Then you have to learn advanced rules - Professional
    Then you disregard the rules - This takes you to the master level................

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