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Thread: Anyone know what grit a Shapton diamond lapping stone is?

  1. #1

    Anyone know what grit a Shapton diamond lapping stone is?

    Hi guys.
    I just ordered a 500HR Shapton Glass. I'm not willing to pay nearly $400 for their lapping plate to maintain a $55 stone. I'm going to use either one of my DMT Diamond plates or some 400 grit wet/dry sandpaper. (Which is what I already use on my Shapton Glass 6000.)

    What grit would you say their lapping plate is?

    Thanks,
    Fred

  2. #2
    Join Date
    Feb 2004
    Location
    Perth, Australia
    Posts
    9,469
    275 grit.

    Fred, you really can use anything around this range - sandpaper, another diamond stone, etc. It just must be flat.

    Regards from Perth

    Derek

  3. #3
    Thanks very much Derek!
    Fred

  4. #4
    Join Date
    Dec 2003
    Location
    Charlotte NC
    Posts
    189
    Grizzly has some inexpensive granite plates that are dead flat. You can just put sandpaper on them and you've got an excellent flattening system.

  5. #5
    Thanks Robin! I'll go take a look.

  6. #6
    Join Date
    Dec 2015
    Location
    Dublin, CA
    Posts
    4,119
    Quote Originally Posted by Frederick Skelly View Post
    Hi guys.
    I just ordered a 500HR Shapton Glass. I'm not willing to pay nearly $400 for their lapping plate to maintain a $55 stone. I'm going to use either one of my DMT Diamond plates or some 400 grit wet/dry sandpaper. (Which is what I already use on my Shapton Glass 6000.)

    What grit would you say their lapping plate is?

    Thanks,
    Fred
    They claim #270-#325, and state the particle size as 45-54 um.

    In the FEPA grit rating scheme that particle size range would correspond to #230 or so.

  7. #7
    Quote Originally Posted by Patrick Chase View Post
    They claim #270-#325, and state the particle size as 45-54 um.

    In the FEPA grit rating scheme that particle size range would correspond to #230 or so.
    Thanks Patrick!

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