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Thread: cnc router bits

  1. 15th September 2015, 07:42 PM #1
    mat_au
    mat_au is offline Senior Member
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    Default cnc router bits

    ok so im started to assemble my cnc and been told to get some cheap bits as i will break a few while learning. can anyone recommend any one to buy these from and also while on the topic of breaking bits, how is the best way to figure out speed ect. is there a program that can help with that?
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  3. 15th September 2015, 09:16 PM #2
    Kuffy
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    Onsrud have information about feed speeds for cnc. based on there own testing, they give approximate chiploads for each of there cutters in all diameters for both hard and soft woods, along with metals, plastics and composites etc.

    Once you know the appropriate chipload needed for a particular cutter, you simply plug that figure into a formula.

    Feed speed = chipload x rpm x # of cutter flutes.
    - reduce speed by 25% if taking a 2x diameter deep pass
    - reduce speed by 50% if taking a 3x diameter deep pass

    http://www.onsrud.com/xdoc/FeedSpeeds
    the chiploads given are imperial measurements.
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  4. 15th September 2015, 10:50 PM #3
    elanjacobs
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    If you feel like driving to Moorabbin, Carbitool has a bargain table with all sorts of bits for not much money; I think the most expensive they get is $15-20
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  5. 15th September 2015, 11:50 PM #4
    pippin88
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    I've been happy with carbide bits from aliexpress. You need to find a seller with spiral wood working bits and get some single flute and some two flute - and you need some upcut and some downcut bits.
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