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What makes a core drill bit dull?

  • Posted by sino seo June 14, 2025 Filed in Business #concrete core bits  56 views
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    Traditional core drill bit sharpening methods

    Using a cinder block

    If you read the handbook when you bought your machine the traditional way to sharpen up a concrete core bits is to run your bit dry through the cinder block a few times and this will expose new diamonds.

    Lessen water flow for a short time.

    Slow the water flow down to a trickle, apply a bit more pressure on the handle, and slowly add water as the bit picks up speed and starts cutting again.

    Add coarse sand to the hole in the kerf and lessen water flow as aforementioned

    How we keep our bits sharp

    Start the core drill, touch the bit to the concrete and slowly turned the water on until it reaches one-quarter inch deep then set the water valve open enough to have good running pressure the size hole you are drilling and your bit should stay sharp. Check the color and temperature of the slurry so make sure the bit stays cool but not so cool that it won't refresh the diamond matrix.

    Non-Traditional core drill bit sharpening methods

    Using a claw hammer
    If you are like most core drillers a cinder block is not available or the option of lessening the water advice just is not working. In the picture above you see the bit turned upside down and a claw hammer gently tapping on the edge of the teeth to chip away some of the metal holding the diamonds so they can be freed to cut again. This idea is offered because many core drill projects are done by someone who does not operate a core drill very often and is in a pinch and the most common tool is the claw hammer. Please! Do not hit them so hard they will break but a few good licks should roughen up the teeth enough to cut a little better.