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The Milwaukee Electric Tool Corp 48-20-7471 is an SDS Plus 2-cutter rotary hammer drill bit sized at 0.5 inches in diameter with a 4-inch working length and 6-inch overall length. Designed for concrete, masonry, and similar hard-material drilling applications, this bit features enhanced rebar guards for increased durability and reinforced flutes engineered to minimize vibration during operation. Breaker points accelerate penetration rates, and a variable flute geometry delivers up to 20 percent more holes per charge when used with cordless rotary hammers. A centering tip allows precise spot placement without walking, and wear mark indicators signal end-of-service life when the bit no longer meets ANSI requirements. Licensed HVAC techs, plumbers, electricians, and general trade professionals rely on this bit for anchor, conduit, and rough-in drilling in concrete and block substrates.
The 48-20-7471 is suited for both residential and commercial jobsite applications wherever SDS Plus rotary hammers are the tool of choice. Common use cases include drilling anchor-bolt holes in foundation walls, penetrating concrete floors and block for conduit runs, and rough-in work in poured and precast concrete. The SDS Plus shank is compatible with the broad range of SDS Plus chuck rotary hammers used across the electrical, mechanical, and plumbing trades. Its cordless-optimized variable flute design makes it particularly effective with battery-powered rotary hammers where charge conservation is a priority on extended runs.
Designed for use with SDS Plus chuck rotary hammers used in concrete, masonry, and block drilling applications across the electrical, mechanical, and plumbing trades.
Installation and use of this bit requires an SDS Plus rotary hammer; confirm chuck type before installing. Always de-energize and lock out any electrical systems before drilling near conduit or service panels, and shut off water supply before penetrating walls containing plumbing. Eye protection, hearing protection, and dust control measures are required when drilling concrete or masonry per standard jobsite safety practices. Inspect wear mark indicators before each use and retire the bit when indicators confirm the ANSI wear threshold has been reached.
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