Masonry drill bit DeWalt DT9429, diameter 28 mm, for rotary hammer, 1 pc

DeWalt DT9429 masonry drill bit with a 28 mm diameter is designed for drilling large holes in concrete, brick and other masonry materials using rotary hammers. The tool features a carbide tip and a shank geometry optimized for hammer action to ensure efficient material penetration and reliable chip evacuation during heavy-duty drilling. Supplied as a single piece, the drill bit is intended for tradespeople and installers who require a durable, precision bit for creating anchor, conduit and pipe entry holes.

Advantages

The carbide-tipped head provides high wear resistance and sustained cutting performance in abrasive masonry. Shank and flute design matched to rotary hammer impact improves drilling speed and reduces binding. The one-piece construction enhances strength and reduces the risk of breakage under repeated hammering loads. Precision-ground geometry supports straighter holes and consistent diameters for reliable anchor seating and fitment of sleeves and pipes.

Suitable for

• Drilling anchor holes in concrete and reinforced concrete
• Creating openings for electrical conduit and plumbing pipework
• Removing material when installing wall anchors and sleeves
• Construction, renovation and repair tasks involving masonry

Key specifications

• Hole diameter: 28 mm
• Intended tool type: rotary hammer
• Tip material: carbide
• Construction: single-piece drill bit
• Primary materials: concrete, brick and general masonry

How to use

Fit the DeWalt 28 mm masonry bit into the chuck or SDS-plus holder of a compatible rotary hammer following the tool manufacturer’s instructions. Mark the drilling point and start at low speed to locate the position, then apply steady pressure and allow the hammer action to drive the bit into the material. Periodically withdraw the bit to clear dust and debris for improved chip removal and cooling. Use appropriate personal protective equipment and secure the workpiece as required.

Usage recommendations

Use with a rotary hammer that supports the bit shank type and offers appropriate power for 28 mm masonry drilling. For reinforced concrete, adopt incremental drilling and check for rebar; consider smaller pilot holes when necessary. Keep the bit clean from packed dust and avoid side loading to prolong service life.