Drill bit Makita SDS‑Max 25 x 400 x 540 mm, 6‑cut (B-05452)

Makita SDS‑Max 25 x 400 x 540 mm, 6‑cut (B-05452) is a rotary hammer drill bit designed for heavy-duty drilling in concrete and masonry. The 25 mm diameter and overall length of 540 mm with a 400 mm working length allow both through-holes and deep drilling operations. The 6‑cut head geometry and hardened carbide tips provide stable centring, consistent bite into hard materials and improved chip evacuation during rotary and percussion drilling.

Advantages

The 6‑cut design delivers balanced cutting forces and reduces vibration for steadier drilling. Carbide cutting edges are selected for wear resistance and prolonged service life under repetitive impact loading. The SDS‑Max shank ensures secure tool engagement and quick bit changes with compatible rotary hammers. The combination of working length and overall length enables flexible use in installation and repair jobs where deeper penetration is required.

Suitable for

• Drilling through reinforced and unreinforced concrete
• Creating holes for anchors, rebar dowels and conduit installation
• Electrical, plumbing and HVAC installation where deep holes are needed
• Construction, renovation and repair tasks requiring repeatable, durable drilling performance

Key specifications

• Shank type: SDS‑Max compatible
• Cut geometry: 6‑cut head
• Tip material: hardened carbide cutting edges
• Diameter: 25 mm
• Working length (cutting length): 400 mm
• Overall length: 540 mm
• Intended materials: concrete and masonry

How to use

Install the bit into an SDS‑Max compatible rotary hammer according to the tool manufacturer's instructions and secure it until it locks. Select proper drilling mode (rotary with percussion) and set appropriate speed and impact settings based on the rotary hammer model and the hardness of the material. Apply steady axial pressure, allowing the bit to cut without forcing; withdraw periodically for dust removal on deep holes. Use water or dust extraction where required to control drilling debris and prolong tip life.

Usage recommendations

Wear appropriate personal protective equipment (eye, ear and respiratory protection) and use dust extraction when drilling concrete. Inspect the carbide tips regularly for wear or damage and replace the bit when cutting performance falls below expectations to maintain safe and efficient operation.