Superabrasive

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    • QC single bar metals
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    Quick Change Metal Bond Tools

    Metal Bond Diamond Tools are used for concrete grinding and are made with a different bond hardness for different types of concrete – soft, medium, hard, extra hard and super hard. Using the wrong bond can cause diamond glazing, premature wear or deep scratches.

    • Choose the right bond, based on the concrete hardness for each specific job. The Mohs Scratch Test kit can help determine the hardness of the concrete.
    • Choose between one or two segments, depending on the grinder weight – use single button / bar tools with grinders 25″ and smaller, and double button / bar tools with grinders 30″ and larger. TIP: Fewer segments cut faster, but also wear out faster. More segments create more surface contact, allowing for surface refinement with less scratches.
    • We recommend using metals with LOW RPM, and for optimal tool life, use 6 tools per head on 13″ heads. 
    • Grit range: 14, 30, 50, 70, 120. To expose medium to large aggregate, you can start with 30 grit metals. For small to medium aggregate start with 70 grit metals. For salt and pepper – 120 grit metals.

    Mohs Scale Metal Diamonds for Concrete

     

    YELLOW SERIES for SOFT CONCRETE
    (under 2500 psi, Mohs Scale 2-3)

    GREY SERIES for MEDIUM CONCRETE
    (2500-4000 psi, Mohs Scale 3-5)

    RED SERIES for HARD CONCRETE
    (4000-5500 psi, Mohs Scale 5-7)

    GOLD SERIES for EXTRA HARD CONCRETE
    (above 5500 psi, Mohs Scale 7-8)

    WHITE SERIES for SUPER HARD CONCRETE
    (above 7000 psi, Mohs Scale 8-9)

     

    See catalog for a complete list of QC Metal Tools with part numbers.Use QC tooling with Security Plates for safe operation.

     

    GRINDING TIP:

    • SOFT CONCRETE is very abrasive and wears out the bond and diamonds faster. You should use a hard bond, such as the QC Yellow series, to avoid premature tool wear.
    • HARD CONCRETE requires a soft bond tool, such as the Red, Gold and White bond, to avoid diamond glazing. Glazed diamonds slide on the concrete surface without cutting because there is not enough abrasion to keep them open. You can try adding water or an abrasive such as sand to open the diamonds but if glazing continues you should switch to a softer bond.

     

    Quick Change Metals with buttons
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