Drill bit Proline 91840 — metal 18 mm diameter, 400 mm length, 1 pc

The Proline 91840 drill bit is a single-piece metal drill bit with an 18 mm diameter and a total length of 400 mm. Intended for drilling metal in industrial and professional environments, this straight shank bit is compatible with drilling machines and tool holders that accept its shank dimensions. It is supplied as one piece and is built for applications requiring deeper, precise holes in metal work.

Advantages

This Proline drill bit features a specially shaped solid carbide insert designed to improve durability and maintain cutting performance under demanding conditions. The geometry supports accurate centered drilling and reduces axial load during operation, while the double-twist design assists in quick chip evacuation to help maintain drilling speed and hole quality. The construction and materials aim to provide effective penetration and extended service life when used as intended on metal.

Suitable for

• Drilling deep holes in metal components and sheet metal
• Workshop and industrial production tasks requiring consistent, repeatable holes
• Use with compatible drilling machines and tool holders for metalworking

Key specifications

• Diameter: 18 mm
• Total length: 400 mm
• Quantity: 1 piece
• Material: metal drill bit with a solid carbide insert
• Shank type: straight shank suitable for matching chucks and holders

How to use

Secure the Proline 91840 drill bit in a drill chuck or tool holder that matches the straight shank size and ensure it is tightened according to the drilling machine manufacturer's recommendations. Select an appropriate rotational speed and feed rate for the metal being drilled, apply consistent axial pressure, and use coolant or cutting fluid as needed to control temperature and prolong tool life. Monitor chip evacuation and pause periodically when drilling very deep holes to clear chips and prevent clogging.

Usage recommendations

Use cutting fluid for most metal drilling operations to reduce heat and wear. Match drill speed and feed to the metal grade and thickness, and inspect the carbide insert periodically for wear or damage; replace the bit if performance drops or signs of excessive wear appear.