Masonry drill bit DeWalt DT9448 for rotary hammer, diameter 4.5 cm, 1 pc

DeWalt DT9448 masonry drill bit for rotary hammer is a single-piece SDS‑max bit with a 45 mm diameter designed for drilling into masonry materials including brick, stone and concrete. Built for use with compatible rotary hammers, this heavy‑duty bit provides stable performance for construction, renovation and installation tasks where larger diameter holes are required.

Advantages

The bit features an advanced solid two‑cutter carbide tip flanked by two additional cutting tips, delivering fast and efficient material removal and improved hole quality. A four‑flute helix efficiently extracts dust and debris from the hole, helping maintain drilling speed and reduce heat build‑up. The one‑piece construction increases durability under high‑impact rotary hammer operation and reduces the risk of tip separation.

Suitable for

• Drilling large diameter holes in concrete
• Creating openings in brick and stone for anchors and inserts
• Heavy‑duty installation work in construction and renovation
• Professional trade use with SDS‑max rotary hammers

Key specifications

• Shank type: SDS‑max compatible
• Diameter: 45 mm
• Construction: one‑piece solid steel body
• Tip: two‑cutter carbide tip with two auxiliary cutting tips
• Flute design: four‑flute helix for efficient dust removal
• Intended materials: concrete, brick, natural stone and masonry

How to use

Install the bit securely in an SDS‑max rotary hammer according to the tool manufacturer's instructions. Select an appropriate drill speed and impact setting for the material being drilled. Begin drilling with steady axial pressure, allowing the hammer action and carbide tip to cut efficiently; avoid excessive force that can overload the bit. Periodically withdraw the bit to clear dust and debris, which helps maintain drilling speed and prolong bit life.

Usage recommendations

Use the bit with appropriate personal protective equipment, including eye and hearing protection. For extended drilling in reinforced concrete, use a reduced feed rate and remove accumulated debris regularly. Store the bit dry and protected to prevent corrosion when not in use.