Porasarja Bosch Professional Expert CYL-9 MultiConstruction Ø7 mm, 10 kpl, työpituus 60 mm

Bosch Cyl-9 spiral cutting drill bit set contains 10 pieces designed for right-hand rotation drilling in a range of common materials. The set includes cylindrical shank spiral cutting bits with centring geometry and carbide tips manufactured for precision. These bits are intended for standard drilling operations in workshops, construction sites and DIY projects where reliable start accuracy and efficient chip removal are required.

Advantages

The set offers accurate hole starts thanks to a specially designed centring tip and Bosch centring geometry, reducing wandering at drill entry. High-performance carbide tips produced by fine grinding maintain cutting edge consistency and durability across multiple materials. An optimised dust extraction channel supports efficient chip removal for faster drilling and reduced friction. Cylindrical shanks ensure compatibility with common three-jaw drill chucks and stable mounting during right-hand rotation.

Suitable for

• Drilling into concrete and masonry
• Drilling into ceramic tiles
• Drilling into metals such as steel (appropriate speeds and cooling advised)
• Drilling into plastics and softwood
• General workshop and construction tasks requiring right-hand rotation

Key specifications

• Type: spiral cutting drill bits with cylindrical shank
• Rotation: right-hand rotation
• Tip: high-performance carbide tip, fine-ground
• Shank: cylindrical, compatible with three-jaw chucks
• Drill diameter: 7 mm
• Length: 100 mm
• Set quantity: 10 pieces
• Optimised dust extraction channel for chip removal

How to use

Insert a cylindrical shank into a compatible three-jaw drill chuck and tighten securely. Select appropriate drill speed and, where applicable, use lubricant or cooling for metal drilling. Start each hole with light pressure to allow the centring tip to locate accurately, then increase pressure steadily while maintaining right-hand rotation. Withdraw the bit periodically to clear chips and prevent heat build-up. Follow safety guidelines including eye protection and appropriate clamps or supports for the workpiece.

Recommendations

Use lower speeds and cutting fluid or intermittent drilling when working with steel to extend tip life. For brittle materials such as ceramic, start drilling with minimal pressure and steady speed to avoid cracking. Replace worn bits to maintain precision and ensure secure chuck mounting before each use.