Drill bit Proline 71421 — metal drill bit Ø14 mm, length 210 mm, 1 pc

The Proline 71421 metal drill bit Ø14 mm, length 210 mm is a single straight-shank cutting tool designed for drilling metal. With a 14 mm cutting diameter and an overall length of 210 mm, this bit is intended for use in hand drills and drill presses that accept straight shanks. It is suitable for producing through holes and for deeper drilling operations in steel and other ferrous materials where extended reach and a robust diameter are required.

Advantages

This Proline metal drill bit offers a long overall length that enables access to recessed or deep workpieces while maintaining the stiffness needed for metal drilling. The straight shank provides compatibility with a wide range of drill chucks and press chucks, and the 14 mm diameter delivers a stable cutting profile for common metalworking hole sizes. The design aims to balance reach and cutting performance for professional and industrial applications.

Suitable for

• Drilling through holes in steel and other ferrous metals
• Deep-hole drilling where extended reach is necessary
• Use in hand-held drills and drill presses with straight-shank holders
• Metalworking and industrial maintenance tasks requiring a 14 mm hole

Key specifications

• Cutting diameter: 14 mm
• Overall length: 210 mm
• Shaft type: straight shank
• Quantity: 1 piece

How to use

Select a drill or press with a chuck that securely clamps a straight shank and set an appropriate rotational speed for the workpiece material. Mark and, if necessary, centre-punch the drilling position on the metal surface. Use cutting fluid suitable for ferrous materials to reduce heat and improve chip evacuation. Apply steady feed pressure, keep the drill aligned with the intended axis, and withdraw periodically to clear chips when drilling deep holes. After completing the hole, deburr the edges as required for the application.

Usage recommendations

For best results when drilling steel or other ferrous metals, use appropriate cutting fluid, start at a moderate speed and increase only if chip formation is steady. Maintain firm, even pressure and ensure the drill bit is correctly secured in the chuck. For very deep holes, withdraw frequently to clear chips and prevent clogging; inspect the bit for wear after extended use.