Drill Bit Makita SDS‑MAX 24 x 400 x 540 mm, 6‑cut Maxi (B-05446)

Makita SDS‑MAX 24 x 400 x 540 mm, 6‑cut Maxi (B-05446) is a heavy‑duty SDS‑MAX drill bit designed for rotary hammer drilling in masonry and concrete. With a 24 mm diameter, 400 mm working length and 540 mm overall length, the bit is intended for demanding construction and renovation tasks. The 6‑cut Maxi head geometry improves cutting efficiency and stabilises drilling, while the SDS‑MAX shank ensures secure tool engagement with compatible demolition hammers and rotary hammers.

Advantages

The 6‑cut Maxi head reduces vibration and increases penetration speed in reinforced concrete and hard masonry. The extended working length allows for deeper holes without the need to change bits frequently, and the robust flute design helps clear debris for continuous operation. Manufactured for compatibility with SDS‑MAX systems, this bit offers reliable connection stability and repeatable performance across heavy‑duty drilling and chiselling applications.

Suitable for

• Drilling holes in concrete and masonry for anchors and dowels
• Heavy‑duty rotary hammer drilling on construction sites
• Chiselling and demolition work with SDS‑MAX demolition hammers
• Installation tasks requiring deep or through‑holes in structural materials

Key specifications

• Diameter: 24 mm
• Working length: 400 mm
• Overall length: 540 mm
• Head design: 6‑cut Maxi
• Shank type: SDS‑MAX compatible
• Material: heat‑treated steel with carbide cutting edges (manufacturer standard)

How to use

Fit the SDS‑MAX shank into the chuck of an SDS‑MAX compatible rotary hammer or demolition hammer until it locks. Mark the drilling position, set the hammer to rotary or hammer mode as appropriate, and begin drilling at a steady feed pressure. Periodically withdraw the bit to clear dust and debris for effective cutting and cooling. For deep holes, drill in stages if needed and ensure the bit remains straight to avoid bending or excessive wear.

Usage recommendations

Use appropriate personal protective equipment including safety glasses, hearing protection and dust mask when drilling. Match the bit to a tool with SDS‑MAX interface and power suitable for 24 mm diameter drilling; avoid side loads and twisting forces. Replace the bit if cutting edges become rounded or if excessive vibration occurs to maintain efficient drilling performance.