Milwaukee 48-20-4054 Spline Drill Bit 1/2 X 36 Inches

Product Description

The MILWAUKEE 48-20-4054 is a spline-shank rotary hammer drill bit designed for drilling into brick, block, and concrete. The 2-cutter carbide head provides aggressive material removal in demanding masonry applications. At 36 inches overall length with a 31-inch drilling depth, this bit handles deep anchor holes and through-wall applications where standard-length bits fall short. The spline drive shank locks into compatible rotary hammer chucks for efficient torque and impact transfer. Electricians, concrete contractors, and general trades rely on this bit for anchor setting, conduit penetrations, and structural drilling in concrete and CMU.

This bit is suited for residential and commercial masonry work. Typical applications include setting anchor bolts, drilling through concrete block walls, and creating penetrations in poured concrete slabs or foundations. The extended 36-inch overall length makes it especially useful for deep foundation work and through-wall conduit runs where reach and drilling depth are critical. It is installed in rotary hammers equipped with a spline drive chuck.

Key Features

• 2-cutter head for efficient material removal in brick, block, and concrete
• Spline shank for secure, high-torque engagement in compatible rotary hammer chucks
• 36-inch overall length for extended reach applications
• 31-inch usable drilling depth for deep anchor and penetration work
• 1/2-inch diameter for standard anchor and conduit penetration sizing

Compatibility

Designed for use with rotary hammer tools equipped with a spline drive chuck. Verify your rotary hammer accepts spline-shank bits before installation.

Installation Notes

Installation is performed by licensed electricians, concrete contractors, or experienced trade professionals using a spline-drive rotary hammer. Always wear appropriate PPE including eye protection and hearing protection when operating rotary hammer equipment. Confirm the drilling area is free of embedded conduit, rebar, or utilities before beginning. Follow applicable OSHA standards and local safety codes for concrete drilling operations.

Technical Specifications

• Shank Type: Spline
• Cutter Head: 2-cutter
• Bit Diameter: 1/2 inch
• Overall Length: 36 inches
• Drilling Depth: 31 inches
• Weight: 1.51 pounds
• UPC: 0045242102440

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-20-4054