Drill bit Makita B-58257 1 cm diameter 455 mm length

The Makita B-58257 1 cm diameter, 455 mm length drill bit is designed for use with rotary hammers for medium to heavy-duty drilling tasks. Manufactured to match the performance expectations of the Makita brand, this single bit combines a long working length with a 10 mm drilling diameter to reach deeper anchor points or pass through thicker materials while maintaining drilling stability.

Advantages

The bit's 455 mm overall length permits access to recessed or deep-set holes without additional extensions. Its 1 cm diameter offers a balance between material removal rate and control, suitable for anchoring and through-holes. Constructed for rotary hammer operation, the drill bit provides efficient energy transfer from the tool to the cutting edge, which helps maintain drilling speed and reduces operator effort during prolonged use.

Suitable for

• Drilling through concrete, masonry and stone for anchors and pins
• Creating deep holes for rebar dowels or through-bolts
• Preparation of mounting points in walls and foundations
• Situations requiring a long-reach 10 mm diameter hole

Key specifications

• Shank type: compatible with rotary hammers (SDS-plus or tool-specific connection — check tool compatibility)
• Drill diameter: 10 mm (1 cm)
• Overall length: 455 mm for extended reach
• Application: percussion/rotary hammer drilling in concrete and masonry
• Material and tip design: engineered for impact drilling and chip evacuation (manufacturer machining and heat treatment)

How to use

Select a rotary hammer that supports the appropriate shank type and insert the drill bit securely into the chuck or SDS mechanism according to the tool manufacturer's instructions. Set the tool to the correct mode (hammer/rotation) for concrete or masonry. Mark the drilling point, apply steady feed pressure while allowing the hammer action to do the work, and periodically withdraw the bit to clear dust and debris to maintain drilling efficiency and prevent overheating. Follow all safety procedures including using eye protection, hearing protection and a dust mask when drilling in masonry.

Usage recommendations

For optimal performance, verify tool-to-bit compatibility before starting. Use intermittent drilling to clear dust when creating deep holes and check the bit periodically for wear. Replace the bit if tip deformation or significant wear is observed to maintain hole accuracy and drilling efficiency.