Milwaukee 48-20-5324 Sds-max Tunnel Bit 3-1/8 Inch Masonry

Product Description

The MILWAUKEE 48-20-5324 is a one-piece SDS-MAX tunnel bit engineered for deep, large-diameter hole drilling in concrete, concrete with rebar, brick, and block. The bit features a 3-1/8-inch diameter and a 22-inch shaft length, supporting continuous deep hole drilling without repeated clearing. A 3-cutter carbide centering tip delivers precise starts and fast material removal. High-volume sloped flutes channel dust out of the bore efficiently, reducing heat buildup and keeping the cut moving. Carbide teeth are ground with rebar chamfers that shear through embedded rebar quickly while maintaining edge integrity and preventing tooth breakage. Licensed HVAC and construction trades reach for this bit when productivity and durability in reinforced concrete matter.

This tunnel bit is designed for use in SDS-MAX rotary hammers and performs in residential and commercial construction applications where deep, clean bores are required through reinforced concrete slabs, block walls, and brick masonry. Typical install scenarios include core-free penetrations for conduit, pipe, and mechanical sleeves where the high-volume flute design eliminates the need to stop and clear the hole during drilling.

Key Features

• 3-cutter carbide centering tip for precise starts and fast grinding of concrete and rebar
• Carbide teeth with rebar chamfers shear through embedded rebar while maintaining maximum durability
• High-volume sloped flutes provide faster dust removal during deep hole drilling
• 22-inch shaft length supports continuous deep drilling without hole clearing
• Robust head with concrete breakers for faster and more durable performance in rebar applications
• Compatible with SDS-MAX rotary hammer chucks

Compatibility

Designed for use in SDS-MAX rotary hammers. Suitable for drilling concrete, concrete with rebar, brick, and block.

Installation Notes

This bit is installed and operated by licensed contractors, electricians, plumbers, and mechanical tradespeople using SDS-MAX rotary hammers. Before drilling, confirm the work area is clear of unmarked utilities and consult applicable building codes for penetration locations. Eye protection, hearing protection, and respiratory protection appropriate for concrete dust are required. Do not use this bit in a standard drill chuck or non-hammer-drill mode.

Technical Specifications

• Bit Diameter: 3-1/8 inches
• Shaft Length: 22 inches
• Overall Package Height: 25.38 inches
• Weight: 4.49 pounds
• Material: Carbide Steel
• Shank Type: SDS-MAX
• Application: Concrete, Concrete with Rebar, Brick, Block
• UOM: Each
• UPC: 0045242316007

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-20-5324