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IndustryArena Forum > Mechanical Engineering > Epoxy Granite > epoxy granite vs natural granite
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  1. #1
    Join Date
    Jul 2014
    Posts
    67

    epoxy granite vs natural granite

    Hello
    What is better for vibration damping stiffness accuracy etc the natural granite or epoxy granite ?
    Because for me natural granite costs much less than epoxy granite...
    For a cnc router 2m X 1.5m table sides and grantry is enough 12cm think granite or must go with 16cm thickness ?
    I will use hgr20 rails with 1605 ballscrews with rotating nut not rotating ballscrew.

  2. #2
    Join Date
    Jul 2018
    Posts
    6248

    Re: epoxy granite vs natural granite

    Hi MR - If you have access to natural granite and can work natural granite then that's the way to go. Its stiffer and more stable then EG. For that size machine I think you should use 25 or 30mm rails not 20mm. Peter

  3. #3
    Join Date
    Jul 2014
    Posts
    67

    Re: epoxy granite vs natural granite

    thank you.
    What do you think about thickness of granite for this size machine? 12cm is enough or needed more for example 16cm ?

  4. #4
    Join Date
    Jul 2018
    Posts
    6248

    Re: epoxy granite vs natural granite

    Hi Mrsa - 120mm of granite is a very stiff chunk of material. For a router I'd expect it to be fine maybe even a bit over what's needed. Will be a heavy chunk of material!! Peter

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