Drill bit AWTools AW42828 — metal/wood drilling accessory, standard twist bit

AWTools AW42828 — a standard twist drill bit engineered as a replacement accessory for general-purpose drilling. Constructed from 40CR alloy steel with two cutting edges and a carbide tip, this bit combines wear resistance and reliable cutting action for a range of materials. The double spiral flute design facilitates efficient chip evacuation and reduces heat build-up, while the grooved SDS+ shank secures the bit in compatible hammer drills and rotary hammers. Intended for tasks in masonry and construction, it is suitable for drilling into hard surfaces where a durable, multi-material bit is required.

Advantages

The carbide tip improves durability and maintains cutting performance when penetrating hard materials. The 40CR alloy steel body provides toughness and resistance to bending under load. Double spiral flutes transport debris away from the cutting edge to minimise clogging and overheating during extended use. The grooved SDS+ shank design prevents accidental slippage, ensuring consistent engagement with the chuck of hammer drills and rotary hammers. Overall design supports both rotary and percussive drilling modes for versatile on-site use.

Suitable for

• Drilling in masonry, concrete and natural stone
• Installing anchors or through-fixing in brick and block
• Tile and ceramic drilling for plumbing and electrical installations
• General construction, repair and renovation work requiring a hammer drill or rotary hammer

Key specifications

• Material: 40CR alloy steel with carbide tip
• Cutting design: two cutting edges
• Flute type: double spiral flute for efficient chip evacuation
• Shank type: grooved SDS+ shank for secure retention
• Drilling modes: suitable for rotary and percussive (hammer) drilling
• Applicable materials: masonry, concrete, granite, natural stone, brick, ceramic tiles

How to use

Install the SDS+ shank into a compatible hammer drill or rotary hammer, ensuring the bit locks into place. Select an appropriate drill speed and, when drilling hard materials such as concrete or stone, use the hammer function. Begin with light pressure to establish a pilot hole, then apply steady forward pressure while allowing the bit to evacuate debris. Periodically withdraw the bit to clear accumulated dust and reduce heat. For tile or ceramic, start with rotary mode at lower speed to avoid cracking, switching to percussive mode only after penetrating the glazed surface if needed.

Usage recommendations

Use appropriate personal protective equipment including safety glasses, hearing protection and dust mask. Match drill speed and hammer action to the material: lower speeds for tiles and ceramics, higher speeds with percussion for concrete and masonry. Avoid excessive force and allow the carbide tip to cut; cooling pauses or light water mist can extend bit life when drilling dense stone or concrete.