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  1. #1
    Join Date
    Apr 2021
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    Default Tassie Oak Feedrate

    Hi all,

    Im kinda new to CNC woodworking. Any suggestion for what bit to use and feedrate for cutting solid tassie oak timber, 25mm-35mm thick.

    The machine is a Biesse Skill 1836.

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  3. #2
    Join Date
    Sep 2009
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    Newcastle
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    549

    Default

    Spindle rpm available?
    Bit size?
    Straight flute. Upcut, down cut?
    Number of flutes?
    Depth of cut?

  4. #3
    Join Date
    Apr 2021
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    Sydney
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    Default

    Quote Originally Posted by pippin88 View Post
    Spindle rpm available?
    Bit size?
    Straight flute. Upcut, down cut?
    Number of flutes?
    Depth of cut?
    Usually we run 24000rpm on most bits. Open to suggestions, as to the specific bit and pass. Need to cut through the 25-33mm thick solid tassie oak panels.

  5. #4
    Join Date
    Feb 2004
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    Oxley, Brisbane
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    3,041

    Default

    In general, whatever the diameter of the bit, I just halve it. So the depth of cut for a 12mm bit would be 6mm and the speed would tend to be about 6 metres a minute.

    Just try it and see what works.
    Bob Willson
    The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.

  6. #5
    Join Date
    May 2019
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    Sydney
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    45
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    209

    Default

    That’s a very open question.

    Chip size is important for heat management.
    bit diameter affects this


    i would turn to manual for a start, and then go start looking at feed and speed calculators online.

  7. #6
    Join Date
    Aug 2008
    Location
    Melbourne
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    6,127

    Default

    Bit late, but I was running a 7.5hp Biesse Rover 24 (18k max rpm) for several years and my feed in solid timber with a 3-flute 12mm solid carbide spiral roughing bit was 4-6 m/min with a 3-4 m/min finish pass, so at 24k rpm you should be right with 6-8 m/min roughing and 4-6 m/min finishing. Using a roughing bit first will preserve the life of your finishing tool and require less cutting pressure; it's also better for dust extraction as it generates smaller chips.

    Cut depth of half bit diameter is way too conservative on a machine like that, it can easily handle a depth of 2x diameter

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