Drill bit DeWalt DT9420 for rotary hammer, Ø 22 mm, length 540 mm, 1 pc

DeWalt DT9420 drill bit for rotary hammer, Ø 22 mm and overall length 540 mm, is designed for drilling larger-diameter, deep holes in concrete and masonry. The bit features a solid two-cutter carbide tip with two additional cutting tips for fast, efficient penetration and a four-flute helix that clears debris to maintain cutting speed. Supplied as a single piece and compatible with SDS Max rotary hammers, this drill bit is intended for construction and renovation tasks requiring reliable performance when creating larger openings.

Advantages

The carbide multi-cutter tip design delivers improved drilling speed and durability compared with standard single-point bits. The four-flute helix provides efficient dust and debris evacuation, reducing clogging and heat buildup during prolonged use. SDS Max shank ensures secure tool engagement and straightforward bit changes in compatible rotary hammers. The 540 mm overall length allows reaching deeper drilling depths without extension accessories.

Suitable for

• Drilling deep holes in concrete and reinforced concrete
• Masonry drilling for anchor installation and through-holes
• Construction and renovation works requiring larger diameter holes
• Use with SDS Max rotary hammers for hammer drilling applications

Key specifications

• Drill diameter: 22 mm
• Overall length: 540 mm
• Tip material: carbide multi-cutter tip with additional cutting tips
• Flute design: four-flute helix for debris removal
• Shank type: SDS Max compatibility
• Quantity: 1 piece
• Typical application: concrete and masonry drilling

How to use

Select an SDS Max-compatible rotary hammer and secure the DeWalt DT9420 by inserting the shank until it locks. Mark the drilling position and start at low speed or with pilot pressure to establish the hole, then apply steady pressure and the hammer function to advance. Use intermittent drilling and withdraw the bit periodically to clear dust, or allow the four-flute helix to remove debris as you progress. Maintain a firm, controlled grip and avoid excessive lateral force to preserve tip life and prevent bit breakage.

Usage recommendations

For best performance and tool life, use appropriate personal protective equipment (eye protection, dust mask, hearing protection), operate the rotary hammer within the manufacturer’s recommended speed and impact settings for 22 mm bits, and let the bit cool by pausing periodically during extended drilling. Inspect the carbide tip before use and replace the bit when cutting efficiency or tip integrity is reduced.