Milwaukee 48-20-3918 Sds-max 4-cutter Bit 5/8x21 in

Product Description

The Milwaukee Electric Tool Corp 48-20-3918 is an SDS-Max 4-cutter rotary hammer bit designed for aggressive concrete and masonry drilling. At 5/8 inch in diameter and 21 inches in overall length, with a working length of 15.5 inches, this bit is built for deep anchor holes, through-slab applications, and heavy structural drilling. The 4-cutter carbide tip geometry increases material removal speed and extends service life compared to standard 2-cutter designs. Licensed electricians, plumbers, and structural contractors reach for SDS-Max bits like this one when core drilling or setting anchors in reinforced concrete.

This bit fits SDS-Max rotary hammer drills and is suited for residential and commercial applications where deep penetration in concrete, block, or brick is required. Typical uses include setting epoxy or mechanical anchors, running conduit through concrete slabs, and drilling pipe penetrations in masonry walls. The 21-inch overall length allows drilling through thick structural elements without extensions. Sold in a package quantity of 20 units.

Key Features

• 4-cutter carbide tip for faster drilling and longer bit life in concrete and masonry
• 5/8 inch diameter — common anchor and conduit knockout size
• 21 inches overall length with 15.5 inches working length for deep-penetration drilling
• SDS-Max shank for secure chuck engagement on full-size rotary hammers
• Package quantity of 20 bits for job-site or shop stocking

Compatibility

Designed for use with SDS-Max rotary hammer drills. The SDS-Max shank is an industry-standard interface and fits SDS-Max chucks from major rotary hammer manufacturers.

Installation Notes

SDS-Max bits are installed and removed by licensed tradespeople and experienced contractors using compatible SDS-Max rotary hammers — do not force this shank into SDS-Plus or spline-drive chucks. Always wear eye protection and dust control equipment when drilling concrete or masonry, in accordance with applicable OSHA silica exposure standards. Inspect the carbide tip for damage before each use and replace bits that show cracking or missing carbide segments.

Technical Specifications

• Shank Type: SDS-Max
• Cutter Configuration: 4-cutter
• Diameter: 5/8 inches
• Overall Length: 21 inches
• Working Length: 15.5 inches
• Weight: 27 pounds (package of 20)
• Package Quantity: 20
• Unit of Measure: EA

Standard Information

• Brand: Milwaukee Electric Tool Corp
• Manufacturer Part Number: 48-20-3918