Diamond core drill bit HOGERT HT7D284 28 mm is a specialist cutting tool engineered for creating precise circular holes in hard, brittle materials. With a 28 mm cutting diameter and a diamond-segmented cutting edge, this core bit is intended for use with rotary drills and drill stands. It delivers clean, burr-free holes in tile, ceramic, natural and engineered stone, and grout while offering improved wear resistance compared with conventional carbide bits.
Advantages
The diamond cutting edge ensures high cutting efficiency and consistent hole quality while reducing chipping on fragile surfaces. The 28 mm diameter provides a versatile size for pipe, fixture and fitting penetrations. Designed for compatibility with standard drill chucks and drill stands, the bit offers reliable concentricity and straight drilling when used with appropriate drill guides. Its robust construction increases lifespan under intermittent professional or DIY use.
Suitable for
- Drilling holes in ceramic and porcelain tiles for plumbing and electrical fittings
- Creating openings in natural stone and engineered stone countertops
- Installing bathroom and kitchen fixtures where clean edges are required
- Repair and renovation tasks involving grout removal and hole cutting in hard materials
Key specifications
- Cutting diameter: 28 mm
- Cutting edge: diamond-segmented rim for hard material cutting
- Intended materials: tile, ceramic, stone, grout
- Use with: rotary drills and drill stands (appropriate chuck or arbor required)
- Typical applications: tile fitting, bathroom and kitchen installations, general repair work
How to use
Secure the drill bit in a compatible chuck or arbor and clamp the workpiece or use a drill stand to ensure perpendicular, stable drilling. For best results, begin drilling at low speed to establish the cutting path, then increase speed moderately while applying steady, light pressure. When drilling tiles or ceramics, use intermittent drilling with periodic withdrawal of the bit to clear debris and prevent overheating. Cooling with water or a suitable coolant during drilling extends tool life and improves cutting performance; ensure electrical safety when using liquids near powered tools.
Usage recommendations
Use appropriate personal protective equipment, including safety glasses, gloves and a dust mask. Match drill speed and feed to the material hardness and avoid excessive force. For brittle tiles, consider backing the tile with sacrificial material to reduce chipping. Inspect the bit regularly for wear and replace when diamond segments are worn to maintain hole quality.
