Drill bit AWTools AW42779 — replacement drilling accessory, model AW42779

AWTools AW42779 drill bit is a replacement drilling accessory designed for use with compatible drills and drivers. Made of alloy steel with a carbide tip and two cutting edges, this drilling bit is intended for creating and enlarging holes in a range of hard materials. The double spiral flute aids chip evacuation and helps reduce overheating during continuous work. With a 130° point angle, the AW42779 is engineered to start reliably and maintain drilling precision in masonry and stone applications.

Advantages

The carbide tip and two-cutting-edge geometry provide improved wear resistance and sustained cutting performance compared with standard bits. The double spiral flute accelerates removal of dust and debris from the hole, reducing friction and temperature rise. The 130° point angle ensures stable positioning at the start of drilling and minimizes walking on hard surfaces. Construction with alloy steel offers sufficient toughness for use with hammer drills and rotary hammers.

Suitable for

• Drilling holes in masonry and concrete
• Creating openings in granite, natural stone and brick
• Cutting through ceramic tiles with controlled technique
• Repair, assembly and general-purpose drilling where a replacement bit is required

Key specifications

• Material: alloy steel body with carbide tip
• Cutting geometry: two cutting edges
• Flute type: double spiral for efficient chip evacuation
• Point angle: 130° for improved centering and reduced walking
• Intended materials: masonry, concrete, granite, natural stone, brick, ceramic tiles
• Compatible tools: hammer drills and rotary hammers

How to use

Select an appropriately sized AWTools AW42779 drill bit for the desired hole diameter and secure it in the drill or rotary hammer according to the tool manufacturer's instructions. For masonry and stone, use the hammer or percussion mode; for ceramic tiles use light pressure and a steady feed to avoid chipping. Begin drilling at low speed to establish the position, then increase speed and apply steady, even pressure. Periodically withdraw the bit to clear dust and reduce heat buildup, and allow the carbide tip to cool if drilling continuously.

Usage recommendations

Use appropriate personal protective equipment including safety glasses, dust mask and hearing protection. For best results in ceramic tiles, start with a pilot point or use masking tape to reduce walking. When drilling deep holes in hard materials, use intermittent drilling and clear debris frequently to preserve bit life and maintain drilling accuracy.