The Makita B-63862 3/4" x 24" SDS-Max Dust Extraction Drill Bit is a carbide-tipped concrete drilling accessory built for rotary hammers that accept SDS-Max shank bits. This is a dust extraction drill bit designed for concrete drilling and faster chemical anchor installation. Model Number: B-63862. If you need a long masonry bit that helps manage dust while keeping holes accurate, this one is built for exactly that job.

The big story here is the built-in dust extraction design. The bit uses dust extraction holes to pull material out of the hole while drilling, which means drilling and hole cleaning happen in one step when paired with a dust extractor sold separately. On anchor jobs, that can cut out extra cleanup steps, speed up installation, and reduce airborne silica dust compared to standard drilling methods.

Makita built this bit around a 3-cutter head for better performance in concrete and improved resistance when you hit rebar. The 3 cutting edges are supported by 3 edge supports, and Makita calls out 3 cutting edges at 135 degrees to help prevent cracking around the hole, along with 3 supports at 120 degrees to improve hole accuracy. In plain terms, that means the bit is made to start clean, track straighter, and leave a more consistent finished hole.

The self-centering tungsten carbide tip helps drive the bit straight from the start. That matters on larger diameter concrete drilling where bit walk can waste time and open up the hole more than you want. Combined with the 3/4 inch diameter, 15-3/4 inch usable length, and 24 inch overall length, this bit is set up for deep drilling applications where reach and hole quality both matter.

Jobsite practicality is a real part of the design. Makita states this bit is an OSHA Table 1 compliant solution when used with approved control devices sold separately. It also fits most common dust extractor vacuums, which gives contractors a way to build a more complete dust-control setup around the rotary hammer they already use. Dust evacuation also helps increase drilling speed and can improve drill bit life by keeping debris from packing into the hole.

For compatibility, this bit is intended for rotary hammers that accept SDS-Max shank bits. It is a concrete drilling accessory, not a general-purpose drill bit. If your work involves anchor holes, deep concrete drilling, or production masonry work where dust control matters, that system-specific design is the reason to buy this style of bit instead of a standard SDS-Max masonry bit.

Who should buy it? This is a smart pick for concrete contractors, mechanical crews, electrical installers, general contractors, and anyone doing repeated anchor-hole drilling in concrete. If you are only drilling occasional shallow holes, a standard bit may be enough. If you need cleaner holes, better dust control, and a setup that supports faster chemical anchor installation, the Makita B-63862 earns its keep.

Buy It for Cleaner, Faster Anchor Holes

The Makita B-63862 3/4" x 24" SDS-Max Dust Extraction Drill Bit makes the most sense for crews drilling deep concrete holes where dust control is part of getting the job done right.

• Who it's for: Contractors and tradespeople drilling concrete for anchors, especially when they need longer reach and a cleaner hole.
• Why it stands out: The dust extraction design, 3-cutter carbide head, and self-centering tip work together to improve hole quality and cut out extra cleanup steps.
• Worth knowing: This is a system-minded accessory. You need an SDS-Max rotary hammer, and the dust-control benefits depend on using the right extraction setup sold separately.

• What material is this bit designed for? It is designed for concrete drilling.
• What tool interface does it use? It uses an SDS-Max shank and is intended for rotary hammers that accept SDS-Max bits.
• How long is the usable drilling length? The usable length is 15-3/4 inches, with a 24-inch overall length.
• Does it help with dust control? Yes. It has dust extraction holes and is designed to reduce airborne silica dust when used with approved control devices sold separately.