Dewalt DW5742 Spline Rotary Hammer Drill Bit 5/8x17x22 in

Product Description

The DEWALT DW5742 is a spline-shank rotary hammer drill bit designed for heavy-duty concrete and masonry drilling applications. Built from hardened steel, this bit is engineered to reduce breakage and extend service life under the high-impact loads generated by rotary hammers. The four-cutter shank geometry improves material removal and keeps the bit tracking straight in demanding substrates. At 22 inches in overall length with a 5/8-inch cutting diameter, it reaches deep anchoring and core locations that standard-length bits cannot access. Licensed contractors and commercial drilling crews rely on this bit for structural concrete, block, and stone work.

This bit is suited for commercial and residential concrete drilling tasks including anchor setting, rebar clearance holes, and through-slab penetrations. The extended 22-inch overall length makes it a practical choice for deep embedment applications and penetrations through thick masonry walls. It is compatible with rotary hammers that accept 3/4-inch hex by 21/32-inch round spline shanks, covering a wide range of professional-grade rotary hammer tools common on commercial job sites.

Key Features

• Hardened steel construction reduces breakage and extends service life in high-impact drilling
• Four-cutter spline shank improves chip evacuation and keeps tracking straight in concrete and masonry
• 22-inch overall length allows deep embedment and through-slab penetrations
• 5/8-inch cutting diameter suits standard anchor and rebar clearance hole sizes
• Designed for rotary hammers accepting 3/4-inch hex by 21/32-inch round spline shanks

Compatibility

Designed for use with rotary hammers that accept 3/4-inch hex by 21/32-inch round spline shanks.

Installation Notes

Installation is performed by licensed contractors or experienced trades using rotary hammers equipped with a matching spline chuck. Before drilling, confirm the hammer is powered off and the bit is fully seated and locked in the chuck. Follow applicable OSHA and local safety codes for overhead or structural concrete drilling, including use of appropriate PPE. Do not use this bit in standard drill-only mode without impact engagement, as this can damage the carbide tip and shorten bit life.

Technical Specifications

• Cutting Diameter: 5/8 inches
• Working Length: 17 inches
• Overall Length: 22 inches
• Shank Type: Spline (3/4-inch hex by 21/32-inch round)
• Cutter Configuration: 4-cutter
• Material: Hardened steel
• Weight: 1.44 pounds
• Sold As: Each

Standard Information

• Brand: DEWALT
• Manufacturer Part Number: DW5742