Concrete spiral drill bit Makita E-24860, 18 mm diameter, 250 mm length

Spiral concrete drill bit Makita E-24860, 18 mm diameter, 250 mm length is designed for drilling straight, deep holes in concrete and masonry. The 18 mm working diameter and 250 mm overall length make it suitable for creating anchor, dowel and conduit holes where a precise bore is required. The spiral flute geometry ensures efficient removal of dust and debris during rotary or rotary-percussion drilling to maintain cutting effectiveness and steady progress through dense materials.

Advantages

The spiral flute design promotes fast evacuation of drilling debris, reducing clogging and heat build-up. Hardened carbide tip provides wear resistance and maintains drilling accuracy over repeated use in concrete and masonry. The 250 mm length allows deeper penetration while the consistent 18 mm diameter supports uniform anchor and sleeve fit. Compatibility with standard SDS-plus or cylindrical chucks (depending on drill adapter) makes it usable with a wide range of rotary and hammer drills.

Suitable for

• Drilling anchor and dowel holes in concrete and block walls
• Creating passage holes for electrical conduit and plumbing
• Renovation and retrofit work where straight 18 mm bores are required
• Contractor and professional applications demanding repetitive drilling
• DIY and home improvement tasks involving masonry drilling

Key specifications

• Diameter: 18 mm
• Overall length: 250 mm
• Intended material: concrete, masonry, block
• Tip material: hardened carbide (wear-resistant)
• Flute type: spiral for efficient debris removal
• Drilling mode: rotary and rotary-percussion compatible

How to use

Secure the drill bit in the correct chuck for your drill, ensuring a firm, concentric fit before starting. For masonry and concrete, use rotary-percussion mode if available and apply steady, even pressure without forcing the bit. Periodically withdraw the bit to clear dust and allow cooling; the spiral flute will help evacuate debris as you pull out. Maintain a consistent drill speed appropriate for the diameter and material—avoid excessive speed to prevent tip wear and overheating.

Recommendations

Wear appropriate personal protective equipment including eye protection, hearing protection and a dust mask when drilling concrete. Use a guide or template for precise positioning of anchor holes. For extended drilling sessions, allow intermittent cooling periods and inspect the carbide tip for wear; replace the bit if the tip shows significant abrasion or chipping to maintain hole accuracy.