Forums General Discussion Triangle cut problems

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    • #6613

      fner99
      Participant
      @fner99

      I am cutting a triangle amethyst and the corners of the girdle keep chipping. I am using a somewhat used 1200 lap and it is still chipping.

      Anyone have a suggestion.

    • #6614

      rockies82443
      Participant
      @rockies82443

      Having the lap rotation cutting into the corner helped me. That was when I was cutting the 2019 novice stone.

    • #6615

      Lowjiber
      Participant
      @Lowjiber

      Perhaps switch to a 3000 lap?

    • #6616

      Have you made sure that the lap speed is low? There are two significant issues with speed. Laps are often not flat and the variation in the vertical heigth cause vibration. So, the higher the speed the more the stone is being shocked. The higher speed will also push the cutting edges of the Diamond more aggressively in the horizontal plane and put stress on the stone that promotes chipping. Also, be sure that you have sufficient water carrying away the waste from cutting. A 1200 lap should be sufficiently smooth to never chip a stone at reasonable speeds.

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