Drill Bit Makita SDS-MAX 19 x 340 mm, model B-05256

Makita SDS-MAX 19 x 340 mm (model B-05256) is a professional rotary-hammer drill bit designed for drilling larger-diameter holes in concrete, masonry and similar substrates. With a 19 mm cutting diameter and a 340 mm overall length, this SDS-MAX shank bit is intended for use in rotary hammers that accept SDS-MAX tooling. It is engineered to deliver straight, deep holes for anchors, through-holes and installations where consistent diameter and penetration depth are required.

Advantages

The drill bit offers secure engagement with SDS-MAX chucks and stable torque transfer for controlled drilling in dense materials. Its 19 mm cutting diameter and extended overall length provide the reach needed for deep anchor and installation work without the need for extensions. The bit is built to withstand repeated impact loading typical of rotary-hammer applications, helping to maintain cutting geometry and drilling performance over time.

Suitable for

• Drilling 19 mm holes in concrete for anchors and dowels
• Creating through-holes for pipe and cable penetrations in masonry
• Installation and repair work on construction sites and in heavy-duty renovation

Key specifications

• Cutting diameter: 19 mm
• Overall length: 340 mm
• Shank type: SDS-MAX compatible
• Intended use: rotary-hammer drilling in concrete and masonry
• Application: deep, straight holes for anchors and installations

How to use

Install the bit into an SDS-MAX compatible rotary hammer following the tool manufacturer's instructions and ensure the shank locks securely. Select the rotary-hammer mode appropriate for drilling with an SDS-MAX bit. Start drilling at low speed to establish the pilot engagement, then apply steady pressure while allowing the hammer action to do the work. Periodically withdraw the bit to clear dust and debris and to prevent binding; use compressed air or a brush for cleaning the hole if needed. Maintain steady alignment to preserve hole straightness and the bit's cutting edges.

Usage recommendations

Use appropriate personal protective equipment (eye protection, hearing protection and dust mask) when drilling. For optimal life and performance, match drill speed and feed pressure to material hardness and clear drill dust frequently. Inspect the bit regularly for wear and replace when cutting performance or straightness degrades.