Rotary hammer extension bit Makita D-34198, length 600 mm, accessory

Makita D-34198 is a 600 mm extension bit designed for SDS‑MAX rotary hammers. This single-piece accessory increases the effective reach of compatible Makita hammers, enabling drilling and chiselling operations in deep or hard-to-reach locations. It is intended for use where additional working length is required while maintaining compatibility with SDS‑MAX chuck systems and concrete-working applications.

Advantages

The extension bit provides a reliable mechanical connection with SDS‑MAX hammers and preserves the hammering action needed for effective work in concrete. At 600 mm length it allows access to recessed areas without modifying the tool or workpiece. Supplied as a single unit, the accessory is straightforward to fit and remove, reducing downtime on the job. The design focuses on durable performance under the impact loads typical for rotary hammer applications.

Suitable for

• Drilling into concrete where extra depth is required
• Chiselling or breaking tasks in recessed or hard-to-reach spots
• Professional construction, renovation and heavy DIY projects using SDS‑MAX hammers

Key specifications

• Length: 600 mm
• Shank/connection type: SDS‑MAX compatible
• Intended material: concrete and masonry
• Pack quantity: single piece

How to use

Ensure the rotary hammer is switched off and unplugged or its battery removed before fitting the extension bit. Insert the SDS‑MAX shank into the hammer’s chuck until it locks into place according to the tool manufacturer’s instructions. Use appropriate drill or chisel tips matched to the extension and the task. Operate the rotary hammer at recommended settings for concrete work, and monitor bit engagement during extended drilling to avoid overstress. After use, retract the bit by following the rotary hammer’s removal procedure and store the extension in a dry place.

Usage recommendations

Use suitable personal protective equipment (eye protection, hearing protection, dust mask and gloves). Match the extension with compatible SDS‑MAX rotary hammers and correct drill or chisel tips. For long continuous drilling, periodically withdraw the bit to clear debris and allow cooling to extend service life.