Hammer drill bit Bosch SDS plus-7X 12×550 mm for rotary and percussion drilling

Bosch SDS plus-7X 12×550 mm is a long SDS‑plus hammer drill bit designed for rotary and percussion drilling in masonry, concrete and similar mineral materials. Its 550 mm overall length provides extended reach for deep-hole drilling tasks while the 12 mm diameter balances drilling speed and hole size for anchoring or through-holes. The SDS‑plus shank ensures secure engagement with compatible hammer drills and enables fast, tool-free bit changes.

Advantages

The drill bit offers a durable carbide tip and an optimized flute geometry that remove debris efficiently during rotary and hammer action. Its extended length allows access to recessed or deep mounting points without the need for extensions. The SDS‑plus connection maintains stable power transfer from the hammer drill to the bit, which supports consistent drilling progress in dense materials.

Suitable for

• Deep-hole drilling in concrete for anchor installation
• Through-holes in masonry and brick
• Drilling for plumbing or electrical installations with extended reach
• Professional and DIY tasks requiring a long SDS‑plus bit

Key specifications

• Diameter: 12 mm
• Overall length: 550 mm
• Shank type: SDS‑plus
• Drilling modes: rotary and percussion (hammer)
• Recommended material: concrete, masonry, brick and similar mineral substrates

How to use

Choose a compatible SDS‑plus hammer drill with an appropriate power rating for the material and bit diameter. Secure the bit in the drill’s chuck until it locks. Mark the drilling point and, when starting, use steady pressure while allowing the hammer action to do the work. For deep holes, withdraw the bit periodically to clear dust from the flutes and allow cooling. Maintain a straight drilling angle to prevent excessive wear or breakage of the bit.

Recommendations

Use personal protective equipment such as safety glasses, hearing protection and dust mask. When drilling reinforced concrete or encountering steel, reduce feed pressure and monitor performance to avoid damaging the bit. For repetitive professional use, inspect the carbide tip and flutes regularly and replace the bit when wear reduces drilling efficiency.