Milwaukee 48-20-3954 Sds-max 4-cutter Bit 1x21 Inch

Product Description

The MILWAUKEE ELECTRIC TOOL CORP 48-20-3954 is a 1-inch by 21-inch SDS-Max 4-cutter rotary hammer bit designed for demanding concrete and masonry drilling applications. The 4-cutter carbide head configuration increases drilling speed and extends bit life compared to standard 2-cutter designs. With an overall length of 21 inches and a working length of 17 inches, this bit handles deeper bores without repositioning. It is packaged in a unit of 10 and is well suited for commercial and industrial jobsite use where high-volume drilling is routine.

This bit is used in SDS-Max rotary hammer drilling applications involving concrete, block, and masonry. Typical install scenarios include anchor hole drilling for structural fasteners, conduit penetrations, and mechanical system rough-in work. The SDS-Max shank interface is common on mid- to large-frame rotary hammers used by commercial concrete trades, electricians, and plumbers performing core and anchor work in reinforced or unreinforced concrete structures.

Key Features

• 4-cutter carbide head for faster material removal and extended service life versus 2-cutter bits
• SDS-Max shank for secure, tool-free chuck engagement on compatible rotary hammers
• 1-inch diameter suited for standard anchor and conduit penetration bore sizes
• 21-inch overall length with 17-inch working length for deep-bore applications
• Sold in a package of 10, supporting high-volume or multi-crew jobsite use

Compatibility

Designed for use with SDS-Max rotary hammer tools. The SDS-Max shank is an industry-standard interface found on mid- and large-frame rotary hammers across multiple manufacturers.

Installation Notes

SDS-Max bits are installed and removed tool-free using the SDS-Max chuck mechanism — never force or hammer the shank into the chuck. Always wear appropriate PPE including eye protection and hearing protection when operating a rotary hammer. Ensure the drill is in the correct mode (hammer drill or rotary hammer) for the material being bored. Inspect the carbide cutters for damage or wear before each use and remove the bit from service if cutters are chipped or missing.

Technical Specifications

• Shank Type: SDS-Max
• Cutter Configuration: 4-Cutter
• Bit Diameter: 1 inch
• Overall Length: 21 inches
• Working Length: 17 inches
• Package Quantity: 10 pieces
• Weight: 32 pounds
• Unit of Measure: EA

Standard Information

• Brand: MILWAUKEE ELECTRIC TOOL CORP
• Manufacturer Part Number: 48-20-3954