Spiral cutting drill bit Bosch 2 608 685 870

The Bosch 2 608 685 870 spiral cutting drill bit is a single-piece SDS max-4 design intended for use with rotary hammers featuring SDS max holders. With a 2.8 cm diameter and a 4-cutter head, this drill bit is optimized for long lifetime when drilling concrete and masonry. Its two-flute U-shaped body promotes reliable dust removal while the carbide cutting tip increases wear resistance and reduces the risk of jamming when encountering rebar.

Advantages

The four-cutter head distributes cutting forces evenly for efficient material removal and prolonged service life. The 2-flute U-shape channel improves dust evacuation from the hole, reducing friction and heat build-up during drilling. Carbide construction of the cutting edges provides high abrasion resistance for sustained performance in concrete and masonry. Compatibility with SDS max holders ensures secure fitting and stable operation in compatible rotary hammers.

Suitable for

• Drilling holes in concrete for anchor installation
• Masonry drilling for utilities and building services
• Work involving reinforced concrete where occasional rebar contact may occur
• Professional renovation and heavy-duty DIY projects requiring SDS max rotary hammers

Key specifications

• Shank type: SDS max compatible
• Tip design: 4-cutter carbide head
• Body profile: 2-flute U-shaped for dust removal
• Intended materials: concrete and masonry
• Diameter: 2.8 cm
• Construction: single-piece, durable carbide cutting edges

How to use

Install the bit into an SDS max rotary hammer according to the tool manufacturer's instructions until it locks securely. Mark the drilling point and start at low speed to position the bit, then apply steady pressure with the rotary hammer in hammer-drill mode for concrete and masonry. Maintain consistent forward pressure without forcing the bit; allow the bit's cutting geometry and hammer action to remove material. If rebar is encountered, reduce pressure briefly and let the carbide cutters grind through, avoiding excessive side load that could damage the bit or tool.

Usage recommendations

Use personal protective equipment including eye protection and dust mask when drilling. For deep holes, periodically withdraw the bit to clear dust and improve cooling. Match drill speed and feed pressure to the rotary hammer specifications and material hardness. Store the bit dry and inspect the carbide tip before use; replace the bit when cutting edges show significant wear.