Drill bits Bosch Expert CYL-9, 5.5 mm, pack of 10

Bosch Expert CYL-9 drill bits, 5.5 mm diameter, pack of 10 provide a consistent core for general drilling tasks. Designed by Bosch for use in handheld drills and drill presses, this set contains ten identical 5.5 mm bits that simplify repetitive drilling work and reduce interruptions for tool changes. The CYL-9 geometry and material selection are intended to deliver steady hole sizes suitable for installation, repair, and assembly operations across a range of materials as specified by the manufacturer.

Advantages

The pack of 10 ensures uninterrupted workflow by supplying multiple spare bits with identical cutting diameter and form, which helps maintain uniform hole quality in serial tasks. Precision machining and a standardized shank profile facilitate secure clamping in standard chucks and reduce runout. Consistent 5.5 mm holes improve fit accuracy for fasteners and components during mounting and assembly procedures.

Suitable for

• Drilling pilot and through holes in wood and soft materials where a 5.5 mm diameter is required
• Installation tasks that require multiple identical holes for fasteners or dowels
• Repair and assembly work with frequent bit replacement to maintain productivity
• Workshop and on-site jobs using standard handheld drills or drill presses

Key specifications

• Diameter: 5.5 mm
• Quantity: 10 identical bits per pack
• Shank type: standard cylindrical shank for common chucks
• Intended use: general-purpose drilling across materials as specified by the manufacturer

How to use

Select the appropriate drill speed and clamp a single 5.5 mm Bosch Expert CYL-9 bit securely in the drill chuck. Align the bit with the intended drilling position, apply steady pressure, and drill through the material while maintaining perpendicularity to the work surface when required. For repetitive tasks, replace worn bits from the pack to retain hole quality; use cutting fluid or reduced speed when working with harder materials if recommended by the material or machine manufacturer.

Usage recommendations

Store the bits in their original pack to prevent damage and to keep matching replacements readily available. Inspect bits for wear or chipping before use and replace any damaged items to avoid oversized or irregular holes. Follow the drill and material manufacturer's guidance on speeds, feed rates, and cooling to extend bit life and ensure consistent results.