Milwaukee Tool 48-20-9042 Hammer Drill Bit 5/8 in

Product Description

The MILWAUKEE TOOL 48-20-9042 is a carbide-tipped rotary hammer drill bit built for heavy-duty percussion drilling into concrete, brick, and block. It features a 5/8-inch cutting diameter with a matching three-flat shank design for secure chuck engagement and reduced bit slippage under load. The 16-inch flute length combined with an 18-inch overall length gives technicians extended reach in deep-bore applications. The two-flute, high-speed steel body channels debris out of the hole efficiently, reducing binding and heat buildup during extended use. This bit is sold individually and is intended for professional trade use.

This bit is suited for residential and commercial construction and renovation work where rotary hammer drilling into masonry substrates is required. Typical applications include anchor setting, conduit stub-out penetrations, and structural fastening into poured concrete or CMU walls. It is commonly used by electricians, plumbers, and general contractors who need extended-length access through thick masonry sections or stacked-block assemblies.

Key Features

• Carbide-tipped percussion cutting head rated for concrete, brick, and block
• 5/8-inch cutting diameter with three-flat shank for positive chuck engagement
• 16-inch flute length for efficient debris evacuation during deep drilling
• 18-inch overall length provides extended reach in confined or deep applications
• Two-flute geometry reduces binding and heat accumulation under load
• High-speed steel body for durability through repeated percussion cycles

Compatibility

Designed as an OEM-style replacement bit compatible with rotary hammer drills accepting a three-flat shank in 5/8-inch diameter.

Installation Notes

Installation should be performed by a qualified tradesperson familiar with rotary hammer operation and applicable safety codes. Always confirm the hammer drill is powered off and the chuck is fully locked before inserting or removing the bit. Wear appropriate eye and respiratory protection when drilling masonry due to silica dust exposure. Do not use this bit in a standard drill driver without percussion capability, as the bit is designed for impact-assisted rotation only.