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IndustryArena Forum > WoodWorking Machines > DIY CNC Router Table Machines > How fast a spindle motor should I get?
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  1. #1
    Join Date
    Jun 2010
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    How fast a spindle motor should I get?

    Was looking at the Ekstrom, with a max rpm of 18k. Does anyone know in general the cutting rpm in different types of materials. I know this depends on bit size, but just in general. Thanks.

  2. #2
    Join Date
    Jan 2009
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    I also would like to know this. I am cutting teakwood.

  3. #3
    Join Date
    Aug 2008
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    1166
    http://www.pdscolombo.com/pdf/PDS%20...0Care%2007.pdf

    Read page 3 for calculations for feedrates for various materials.

  4. #4
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    Jan 2009
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    Thank you very usefull information! btw what is the meaning of number of cutting edges?

  5. #5
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    Number of cutting edges / teeth / flutes on the cutter. Common values are 1, 2, 3, 4, etc.

  6. #6
    Join Date
    Mar 2003
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    35538
    Quote Originally Posted by HereinCS View Post
    Was looking at the Ekstrom, with a max rpm of 18k. Does anyone know in general the cutting rpm in different types of materials. I know this depends on bit size, but just in general. Thanks.
    18K is good down to around 1/8" bits. If you want to use smaller bits at speeds over 200ipm, you might want 24K.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

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    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  7. #7
    Join Date
    Oct 2006
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    735
    My Ekstrom is 18K and I've been happy with it (or have not wanted for more)..

    Although I have a engraving head for the super small bit stuff.

    b.

  8. #8
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    Jan 2009
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    Quote Originally Posted by jsheerin View Post
    Number of cutting edges / teeth / flutes on the cutter. Common values are 1, 2, 3, 4, etc.
    so for example if I have a 2 flute flat endmill is that mean I have 2 cutting edges? is this correct?

    and also what is feed / tooth means??

    I'm so confused by this engineering calculation please help
    THank you much in advance

  9. #9
    Join Date
    Dec 2003
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    24223
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

  10. #10
    Join Date
    Jan 2009
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    396
    Quote Originally Posted by Al_The_Man View Post
    I still don't understand how to the way it calculate.
    Can someone got a simpler way to teach my numbing brain?

  11. #11
    Join Date
    Jan 2009
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    396
    is this enough? with 1 hp motor installed?
    Click image for larger version. 

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