Milwaukee Tool 48-20-9116 Hammer Drill Bit 5/16 in

Product Description

The MILWAUKEE TOOL 48-20-9116 is a carbide-tipped rotary hammer drill bit designed for percussion drilling into masonry and concrete. The bit features a 3-flat shank that locks securely into compatible rotary hammer chucks, reducing slip during high-torque operation. At 5/16 inch in diameter with a 4-inch flute length and 6-inch overall length, it handles standard anchor hole and fastener applications in block, brick, and concrete. The two-flute design channels debris out of the hole efficiently, keeping the cutting edge clear. Licensed contractors and masonry tradespeople will find this bit suited for both light production work and service calls.

This bit is intended for rotary hammer and hammer drill applications in residential and commercial masonry work. Primary workpiece materials include concrete block, brick, and poured concrete. It is a single-piece consumable packaged individually, making it a practical replacement or add-on bit for field kits. The percussion cutting geometry is optimized for SDS-compatible or 3-flat chuck rotary hammers operating in hammer-drill mode.

Key Features

• Carbide-tipped cutting edge for extended wear life in abrasive masonry materials
• 3-flat shank secures in compatible hammer drill chucks and minimizes rotational slip
• 5/16 inch diameter covers common anchor and fastener hole sizes in concrete and block
• 4-inch flute length with 2-flute design for efficient debris evacuation
• 6-inch overall length provides reach in standard depth applications
• Percussion cutting shape engineered for hammer-drill and rotary hammer mode

Compatibility

Designed for use with hammer drills and rotary hammers equipped with a 3-flat chuck accepting a 5/16-inch shank. Suitable for drilling into block, brick, and concrete.

Installation Notes

Installation of this bit should be performed by a qualified tradesperson familiar with rotary hammer operation. Ensure the hammer drill or rotary hammer is fully powered off and the chuck is released before inserting or removing the bit. Eye and respiratory protection are recommended when drilling masonry due to silica dust hazards — follow applicable OSHA respirable crystalline silica standards. Do not use this bit in a standard drill-only mode; the percussion cutting geometry requires hammer action to perform correctly.