Dunnet Tools Core Drill Bit Set - 125mm

This set is specifically designed for SDS plus rotary hammer drills to ensure optimal power transfer and stability.

While designed for concrete, reinforced concrete with dense rebar may be challenging. For best results and to avoid damage, proceed with caution, and consider using a specialized rebar-cutting bit if necessary.

Using the pilot drill for accurate starting, maintaining a steady speed, and applying consistent pressure will help create cleaner holes. Dust extraction can also improve the finish.

The lifespan depends heavily on the material being drilled and the frequency of use. The robust TCT teeth offer excellent durability for professional applications on masonry and concrete.

For some materials like asphalt or very hard concrete, using water can help cool the bit and reduce dust. However, for standard brick and masonry, dry drilling is typically sufficient, but always follow material-specific guidelines.

Store the set in a clean, dry environment. Keeping it in its original protective case or a dedicated tool bag will prevent damage to the teeth and shank.

Ensure the drill is set to hammer action and rotation. Check if the TCT teeth are worn or damaged and require sharpening or replacement. Verify you are using adequate downward pressure and that your drill has sufficient power.

Confirm the SDS shank is securely locked into the drill chuck. Ensure the pilot drill is properly installed and aligned. Check for any damage to the drill chuck or the drill bit shank.

Ensure no debris is obstructing the pilot drill holder. Try gently cleaning the holder and the pilot drill shaft.

Allow the drill bit to cool down periodically. Use a moderate, consistent pressure and avoid forcing the bit. Ensure adequate dust extraction or lubrication if the material requires it.