Drill bit AWTools AW42891 — metal/concrete drilling accessory (AW42891)

AWTools AW42891 is a drill bit designed as a drilling accessory for general-purpose use in construction and repair. Built with a 40CR alloy steel body and a YG8C tungsten carbide head, this bit is intended for drilling masonry, concrete, granite, natural stone, brick and ceramic tiles. The grooved SDS+ shank ensures secure retention in compatible hammer drills and rotary impact hammer drills, making it suitable as a replacement or spare bit for applications requiring a specified AWTools model.

Advantages

The combination of a 40CR alloy steel shaft and a YG8C carbide cutting head gives an effective balance of toughness and wear resistance, while the 2-cutter spiral geometry promotes efficient removal of spoil to reduce heat build-up and vibrations during drilling. The grooved SDS+ shank prevents the bit from falling out during use and enables fast, tool-free bit changes in compatible chucks. Designed for use with hammer drills and rotary impact hammer drills, the bit provides stable performance across a range of hard substrates.

Suitable for

• Drilling holes in reinforced concrete and plain concrete for anchors and dowels
• Creating openings in brick and block for installation and routing
• Drilling into natural stone and granite for light-duty fixing
• Punching holes in ceramic tiles when used with appropriate technique and low-speed settings
• Use with hammer drills and rotary impact hammer drills for construction and repair tasks

Key specifications

• Material: 40CR alloy steel body with YG8C tungsten carbide head
• Tip design: 2-cutter spiral for chip evacuation and reduced vibration
• Shank type: grooved SDS+ shank for secure retention and quick changes
• Intended application materials: masonry, concrete, granite, natural stone, brick, ceramic tiles
• Compatible tool types: hammer drill and rotary impact hammer drill

How to use

Fit the AWTools AW42891 into a compatible SDS+ chuck and ensure the shank engages the grooves until it locks. Select the appropriate drill speed and hammer setting for the substrate: use hammer action and moderate feed pressure for concrete and masonry, and reduce speed and hammer action when approaching or drilling ceramic tiles. Start drilling with steady, even pressure and periodically withdraw the bit to clear accumulated dust and debris. Allow the bit to cool between long drilling runs to preserve the carbide cutting edge.

Usage recommendations

For best results, match drill diameter and drilling technique to the substrate: use continuous hammer action and firm but controlled pressure for concrete; when drilling tiles, start from a low speed and avoid excessive percussion near edges. Wear appropriate eye, ear and respiratory protection and secure the workpiece before drilling. Replace the bit if cutting performance deteriorates or if the carbide tip shows visible damage.