Drill Bit AWTools SDS Max 40×400×540 mm, square shank, model AW43879

AWTools SDS Max 40×400×540 mm drill bit (model AW43879) is a heavy-duty masonry bit engineered for rotary hammers with an SDS Max chuck. With a 40 mm diameter, 400 mm working length and 540 mm overall length, this drill bit provides extended reach for deep holes in concrete, brick and similar materials. The square shank design improves torque transfer and secures the bit in the tool during demanding drilling tasks.

Advantages

The square shank ensures a positive mechanical coupling with the SDS Max holder, reducing slippage under high load and improving drilling efficiency. Its long working length allows access to recessed areas and deeper anchoring or installation points without the need for extensions. The bit is designed for durable performance in masonry and concrete, providing consistent cutting action and reliable hole quality in professional and heavy-duty applications.

Suitable for

• Drilling deep holes for anchors and dowels in concrete and masonry
• Installing through-feed sleeves and conduit in walls
• Professional construction and renovation work requiring extended reach
• Heavy-duty drilling tasks with SDS Max rotary hammers

Key specifications

• Tip diameter: 40 mm
• Working length: 400 mm
• Overall length: 540 mm
• Shank type: square shank compatible with SDS Max chucking systems
• Intended material: concrete, masonry and similar mineral substrates

How to use

Select an SDS Max-compatible rotary hammer and secure the bit in the chuck according to the tool manufacturer's instructions, ensuring the square shank engages fully. Mark the drilling position, start at low speed to establish the pilot contact, then apply steady pressure while running the hammer in rotary or rotary-plus-percussion mode as appropriate for the substrate. Withdraw occasionally to clear dust from deep holes and allow the bit to cool. Use correct personal protective equipment such as eye protection, hearing protection and dust control measures.

Usage recommendations

For long-term bit life and consistent hole quality, use the bit with SDS Max rotary hammers rated for heavy-duty masonry work, avoid excessive lateral force, and clean flutes periodically when drilling deep holes. For drilling reinforcement or extremely hard areas, consider using a properly rated carbide-tipped or specialized bit and follow recommended feed pressures and rpm ranges from the rotary hammer manufacturer.