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  1. #1

    Single Point Diamond Turning

    I have read many posts about SPDT and it looks like what I need to avoid polishing acrylic parts that I am CNC turning.
    The dimensions are not critical so I am looking for low-cost sources of diamond tooling. Any suggestions? TIA
    Bertho

  2. #2
    Join Date
    Oct 2004
    Posts
    38
    Bertho

    Just using a monocrystalline diamond tooling will not give you a superb finish as there are other factors that contribute to achieving optical finishes. The use of fluid film bearings for both the spindle and slideways has a major impact as things like spindle runout and stiction cause major scratches although on a microscopic scale. I have seen diamond tools on ebay however i would not like to say how good they are. I would suggest you firstly buy a PCD (polycrystalline diamond) insert from ebay for about 10 pounds and see if this improves it enough and the next step i would suggest is purchase a cheap air bearing spindle one of which i have picked for less than 50 quid. You make a mount to use it in a standard lathe and this will significantly improve the asynchronous runout which is the biggest factor in surface finish whereas synchronous runout affects form. Hope this helps

    Regards

    Flannman

  3. #3
    Thanks Flannman,
    I looked at eBay without luck but I will keep looking. Good advice too about the air bearing spindle.
    A second reason for the diamond tooling is that the parts that I am making are very small, just a couple of mm in diameter, and I have serious heat problems with the regular tooling. I am hoping that the very sharp diamond will produce less heat.
    Thanks again,
    Bertho

  4. #4
    Join Date
    Jan 2008
    Posts
    39
    Quote Originally Posted by Bertho View Post
    I have read many posts about SPDT and it looks like what I need to avoid polishing acrylic parts that I am CNC turning.
    The dimensions are not critical so I am looking for low-cost sources of diamond tooling. Any suggestions? TIA
    Bertho
    Bertho,

    Please feel free to send me a pm with your specifications/requirements with regards to the diamond tools that you are looking for. I would be more than happy to try and help you out.
    K&Y Diamond Ltd. - Ph514) 333-5606, Fax514) 339-5493
    http://www.kydiamond.ca

  5. #5
    Join Date
    Feb 2017
    Posts
    1

    Re: Single Point Diamond Turning

    Everything You Want To Learn About Diamond Turning:
    https://syntecoptics.com/blog/everyt...mond-turning-2

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