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    Home / TOOLS FOR TILERS / Korunky / Diamond Core Drill Bit Set 90/60 mm for Concealed Buttons

    Diamond Core Drill Bit Set 90/60 mm for Concealed Buttons

    Code: 875
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    Sada korunek na Tlačítka 90/50mm
    €160,46 / pcs €132,61 excl. VAT €80,23 / 1 pcs
    Stock (5 pcs)
    Delivery to:
    12.03.2026
    Delivery options
    Category: FOR TILERS > Core Bits
    Core Bit Set for Flush Buttons 90/60mm

    Professional solution for invisible installation of control buttons. Drill perfectly clean holes even in the hardest porcelain tiles without damaging the glaze.

    🏗️ Clean cut without chipping
    ⚙️ FULL diamond segment
    🎁 Set 90 mm + 50 mm

    Detailed information

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    Product detailed description

    📊 Technical Parameters

    Diameters: 90 mm and 60 mm
    Shank: 10 mm (for standard chuck)
    Segment Type: Sintered (FULL diamond)
    Segment Height: 10 mm
    Cooling: Water (required)
    Product Code: 695

    💡 Why choose this solution?

    This set includes two key core bits with diameters of 90 mm and 60 mm, which are essential for installing modern round flush buttons under the tiles. Unlike cheap alternatives, these tools feature a 10 mm high sintered diamond segment (FULL). Diamond grains are evenly distributed throughout the entire volume of the segment, not just on the surface, ensuring extreme durability and a consistently sharp, clean cut.

    Tested at J&J Tile Design: We use these bits for every invisible button installation. The result is a precise hole with an edge completely free of glaze damage, which is absolutely crucial for the final appearance of porcelain tiles.

    🛠️ Professional Assembly TIP: These bits are designed for precise perpendicular (90°) drilling. To ensure 100% accuracy and prevent the bit from "skidding" on the smooth tile, it is essential to use a drill guide (template). Throughout the drilling process, ensure a sufficient supply of water – forced cooling is a strict condition for maintaining the functionality of the diamond segment.
    🔍 Expert's View: Don't forget to "sharpen" the core bits before the first use in an abrasive material. Repeat this whenever you feel the bit is losing its cutting speed. Sharpening cleans the segment and exposes new diamond grains, returning the tool to its maximum performance.
    ✅ Key Benefits
    • Sintered FULL diamond segment for maximum lifespan.
    • Clean cut without glaze damage in porcelain, ceramic, and marble.
    • Thin-walled design for gentle and fast hole cutting.
    ⚠️ What to watch out for
    • Water cooling required – dry drilling will irreversibly destroy the bit.
    • Requires the use of a drill guide for precise perpendicular start.
    • Necessary to sharpen in abrasive material before use and when clogged.

    Practical FAQ

    Can these bits be used with a standard cordless drill?
    Yes, the bits have a standard 10 mm shank that fits into any common drill chuck. The key is to ensure water supply for cooling.
    Why is it necessary to drill with a guide?
    These bits do not have a pilot center drill. Without a guide, the bit would skid across the smooth tile, damaging the surface. The guide holds it exactly in place for a perfect perpendicular cut.
    What is the difference between sintered and coated diamonds?
    Standard cheap bits only have a thin layer of diamond on the surface. A sintered (FULL) segment means the diamonds are "baked" into the entire volume of the 10 mm high segment. The bit thus cuts with the same quality even after significant wear.

    Additional parameters

    Category: Korunky
    Warranty: 2 years (Company 1 year)
    Weight: 0.5 kg

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