Milwaukee Tool 48-20-9018 Hammer Drill Bit 5/16 in

Product Description

The MILWAUKEE TOOL 48-20-9018 is a carbide-tipped rotary hammer drill bit designed for percussion drilling into masonry materials. Built on a high-speed steel body with a 5/16-inch diameter and a three-flat shank, this bit delivers reliable grip in SDS-style and keyed hammer drill chucks. It features an 8-inch flute length and a 10-inch overall length, giving tradespeople the reach needed for through-hole applications in block, brick, and concrete. The two-flute, percussion-ground cutting geometry clears debris efficiently during rotary hammer operation. Electricians, HVAC installers, and plumbers use bits like this when anchoring equipment or running conduit through masonry substrates.

This bit is suited for residential and light commercial masonry drilling tasks. Typical applications include setting anchor bolts, drilling penetrations for conduit or pipe sleeves, and boring through concrete block or brick during rough-in work. The 5/16-inch diameter is a common size for drop-in anchors and sleeve anchors used in mechanical and electrical trades. The three-flat shank design prevents slipping in compatible hammer drill chucks and is a standard configuration across rotary hammer accessories.

Key Features

• Carbide-tipped cutting edge for extended service life in masonry
• 5/16-inch drill diameter and matching shank diameter for consistent fit
• 8-inch flute length promotes effective debris evacuation during drilling
• 10-inch overall length provides reach for through-wall and deep anchor applications
• Three-flat shank resists rotation and seats securely in compatible chucks
• Percussion cutting shape optimized for rotary hammer operation in block, brick, and concrete

Compatibility

Designed as an OEM-style replacement bit for use in rotary hammer drills and hammer drills that accept a three-flat shank configuration. Primary workpiece materials are block, brick, and concrete.

Installation Notes

This bit is installed and used by licensed electricians, plumbers, HVAC technicians, and general trade contractors performing masonry penetration work. Ensure the drill chuck is fully tightened and the bit is seated completely before drilling. Wear appropriate eye and respiratory protection when drilling into concrete or masonry. Follow applicable OSHA silica dust control requirements when drilling dry into concrete substrates.