Conical HSS TiN Drill Bit GEKO 4–52 mm (set 5/50)

GEKO conical HSS TiN drill bit set covers a continuous drilling range from 4 to 52 mm and is supplied as a 5/50 set. The tool features a stepped (conical) geometry in high-speed steel with a titanium nitride coating, allowing progressive enlargement of holes and accurate creation of stepped diameters. Designed for use on metal, plastic and thin sheet materials, the drill bit set is suitable for both hand-held and machine-driven applications where a conical step profile is required.

Advantages

The HSS core provides toughness and wear resistance during cutting, while the TiN coating reduces friction and extends tool life. The conical step profile enables multiple diameter steps with a single tool, reducing tool changes and setup time. The continuous 4–52 mm range allows flexible diameter selection and smooth drilling transitions. The rigid geometry supports stable drilling in thin materials and improves hole concentricity when used with appropriate speed and feed settings.

Suitable for

• Enlarging or creating stepped holes in sheet metal and thin steel parts
• Drilling progressive diameters in plastics and composite panels
• Rapid hole sizing for flange and bracket modifications
• Workshop and maintenance tasks requiring versatile hole diameters without frequent tool changes

Key specifications

• Material: high-speed steel with titanium nitride (TiN) coating
• Drilling range: 4–52 mm (conical stepped profile)
• Set type: 5/50 configuration covering the full step range
• Suitable workpiece materials: ferrous metals, non-ferrous metals, plastics, thin sheet materials
• Recommended operation: compatible with hand-held drills and machine spindles

How to use

Mark the desired hole position and secure the workpiece to prevent movement. Start drilling at low speed to center the conical tip, then increase speed gradually according to the workpiece material and drill size. Use cutting lubricant when drilling metals to reduce heat and improve chip evacuation. Apply steady, moderate feed pressure; avoid forcing the tool to prevent premature wear or breakage. For precise stepped diameters, pause periodically to clear chips and verify progress.

Usage recommendations

For best results on metals, select an appropriate cutting fluid and operate at medium speeds to balance cutting performance and tool life; when working with plastics, use lower speeds and minimal lubricant to avoid melting. Always wear eye protection and secure the workpiece before machining.