Drill bit AWTools AW42878 — model AW42878, weight 813 g

AWTools AW42878 drill bit is a replacement drilling accessory designed for use with compatible hammer drills and rotary impact hammer drills. Made of 40CR alloy steel with a YG8C tungsten carbide head, the AW42878 is built for drilling in masonry, concrete, granite, natural stone, brick and ceramic tiles. The 2-cutter spiral design and grooved SDS+ shank support reliable chip removal and secure holding during operation. The listed weight of the item is 813 g.

Advantages

The combination of a 40CR alloy steel body and a YG8C tungsten carbide head provides increased wear resistance and durability when working in abrasive materials. The 2-cutter spiral geometry promotes efficient evacuation of spoil, lowers the risk of overheating and reduces vibration transferred to the tool. A grooved SDS+ shank ensures stable fixation in compatible chucks and prevents the bit from falling out under impact loads. The design is suitable for use in a wide range of hard building materials.

Suitable for

• Drilling holes in masonry and concrete for anchors and fixings
• Installing fixtures in brick and natural stone
• Drilling through ceramic tiles and sanitary ceramics with care
• Professional repair, maintenance and construction site work
• DIY renovation projects requiring robust drill bits

Key specifications

• Body material: 40CR alloy steel
• Head material: YG8C tungsten carbide
• Cutting geometry: 2-cutter spiral
• Shank type: grooved SDS+
• Compatible tools: hammer drills and rotary impact hammer drills
• Intended materials: masonry, concrete, granite, natural stone, brick, ceramic tiles
• Weight: 813 g

How to use

Install the AWTools AW42878 drill bit into a compatible SDS+ chuck, ensuring the groove locks securely. Select the appropriate drill speed and hammer function according to the base material: lower speeds and hammer action for hard masonry and stone, moderate speeds for ceramic tiles to reduce chipping. Apply steady axial pressure while maintaining tool control; allow the bit to remove material naturally rather than forcing excessive feed. Periodically withdraw the bit to clear accumulated dust and spoil if drilling deep holes.

Usage recommendations

Use appropriate personal protective equipment (eye and ear protection, dust mask) and follow the drill manufacturer's instructions. For drilling tiles, start with a pilot hole at reduced speed and avoid excessive hammer action close to the tile surface. Replace the bit when cutting performance drops or when the carbide head shows visible wear to maintain safe and efficient drilling.