Bosch Breakthrough drill bit sds max-9 5.5 cm diameter 600 mm length

The Bosch Breakthrough drill bit SDS max-9 with a 55 mm diameter and 600 mm overall length is designed for drilling large and deep holes in concrete and other masonry materials. Intended for use with rotary hammers, this long, tapered-shank drill bit enables breakthrough-drilling and is built for heavy-duty, professional applications where extended reach and continuous chip removal are required.

Advantages

The SDS max-9 geometry combines a long tapered shank for controlled breakthrough with a 2-flute U-shaped profile that promotes efficient dust and debris evacuation. Constructed for durability under high loads, the bit maintains stability during deep drilling and reduces the risk of jamming. Its length and flute design help preserve drilling speed and improve hole quality when working in reinforced concrete or thick masonry.

Suitable for

• Drilling large-diameter, deep holes in concrete and masonry
• Installing anchors, dowels, or sleeve anchors in structural work
• Preparing holes for utility passages or through-holes in walls and floors
• Construction and renovation tasks requiring extended reach

Key specifications

• Diameter: 55 mm
• Overall length: 600 mm
• Shaft/connection type: SDS max-compatible tapered shank designed for rotary hammers
• Flute design: 2-flute U-shaped profile for improved dust removal
• Intended material: concrete and masonry (including reinforced concrete)
• Application type: breakthrough and deep hole drilling

How to use

Fit the drill bit into a compatible rotary hammer with SDS max capacity and secure it according to the tool manufacturer’s instructions. Position the bit on the marked drilling point, use steady axial pressure and allow the hammer action to perform the cutting; avoid forcing the bit. For breakthrough-drilling, control the feed and keep the drill aligned to prevent bit deviation. Periodically withdraw the bit to clear accumulated dust and to prevent overheating when drilling deep holes.

Usage recommendations

Always use a rotary hammer with the appropriate power and capacity for breakthrough drill bits to avoid overload. Follow the operating and safety instructions of the rotary hammer, wear appropriate personal protective equipment, and clear the drilling area of obstructions. For reinforced concrete, consider pre-drilling with a pilot bit or use progressive feed to reduce stress on the drill bit.