Drill bit Proline 91080 — 10 mm diameter, 800 mm length, 1 pc

Proline 91080 metal drill bit, 10 mm diameter and 800 mm overall length, supplied as a single piece. This long-reach straight twist bit is intended for drilling metal and other rigid materials where a deep or hard-to-reach hole is required. The design balances reach and rigidity to enable workshop, maintenance and installation tasks that need extended penetration while retaining centered drilling performance.

Advantages

The drill bit features a specially shaped solid carbide insert that increases durability and maintains cutting effectiveness under sustained loads. A double-twist flute design promotes fast chip evacuation and reduces drive load during penetration, contributing to consistent drilling speed and improved accuracy. The bit’s dimensions—10 mm diameter and 800 mm overall length—provide extended reach for deep holes while preserving axial stability for centered drilling.

Suitable for

• Workshop drilling in metal components and structural elements
• Maintenance and repair tasks requiring deep or hard-to-reach holes
• Installation work where long-reach holes through rigid materials are needed
• Drilling in concrete, granite and other natural stones when a carbide tip is required

Key specifications

• Diameter: 10 mm
• Overall length: 800 mm
• Quantity: 1 piece
• Tip material: solid carbide insert for durability and centered drilling
• Flute geometry: double twist for efficient chip evacuation
• Intended materials: metal, concrete, granite and other rigid materials

How to use

Select an appropriate drill holder or chuck that securely clamps the 10 mm shank and supports the extended length to minimize runout. Begin drilling at low speed to establish a centered start, then increase speed and feed according to the work material and machine capability. Use steady axial pressure without excessive side loads to preserve the carbide insert and maintain hole accuracy. For drilling in stone or concrete, employ a suitable hammer or rotary-percussion setting only if the tool and holder are rated for that mode; otherwise use rotary drilling with appropriate cooling or dust control.

Usage recommendations

For best results, ensure correct alignment and secure clamping of the long bit, use appropriate speeds and feeds for the work material, and remove chips frequently to prevent clogging. When working with abrasive or hard materials, monitor the carbide insert for wear and replace the bit when cutting performance declines.