Drill bit Makita SDS‑Max 18 x 200 x 340 mm 6‑flute (B-05240)

Makita SDS‑Max 18 x 200 x 340 mm 6‑flute (B-05240) is a rotary drill bit designed for use with SDS‑Max rotary hammers. The 18 mm diameter and 200 mm working length provide a balance between reach and rigidity, while the overall 340 mm length includes the shank suitable for SDS‑Max chucks. The 6‑flute geometry is engineered to improve cut stability and clear drilled material more effectively, making this bit suitable for producing clean, consistent holes in concrete, masonry and natural stone.

Advantages

The 6‑flute profile enhances dust evacuation and reduces bit wobble during rotation, which contributes to more accurate hole alignment and longer tool life compared with fewer‑flute designs. Optimized flute shape and cutting geometry reduce clogging when drilling in dense materials, and the robust SDS‑Max shank ensures secure engagement and efficient energy transfer from the rotary hammer to the cutting head.

Suitable for

• Drilling holes for anchor bolts and chemical anchors in concrete and masonry
• Installing plumbing and electrical conduits through solid walls
• Core and pass‑through holes for mechanical fixings and utility installations
• Construction and renovation tasks requiring repeatable, straight bores in stone and blockwork

Key specifications

• Diameter: 18 mm
• Working length (drill length): 200 mm
• Total length: 340 mm
• Shank type: SDS‑Max compatible
• Flute design: 6‑flute geometry for improved dust removal and stability
• Material/application: for use in concrete, masonry and natural stone

How to use

Fit the bit securely into the SDS‑Max rotary hammer according to the tool manufacturer's instructions. Use the rotary hammer in hammer‑drill mode suitable for SDS‑Max bits. Start drilling at low speed to establish the hole, then apply steady pressure while allowing the hammering action to break material. Periodically withdraw the bit to clear accumulated dust and debris from the hole and the flutes; this helps maintain drilling speed and prevents overheating. For deep or long holes, withdraw more frequently to remove debris completely.

Usage recommendations

Use personal protective equipment including eye and hearing protection and dust extraction or wet methods when possible. Match drill diameter and working length to the fastening system or conduit being installed. When drilling reinforced concrete, proceed cautiously and consider using specialized bits if frequent rebar contact is expected.