Metal drill bit Proline 91821 — 18 mm diameter, 210 mm length, 1 pc

Proline 91821 is a single metal drill bit with an 18 mm diameter and a total length of 210 mm, supplied as one piece. Designed for drilling metal, this solid drill bit is suitable for through-holes and deeper drilling tasks in steel and other ferrous materials. The shank and flute geometry are intended for use with compatible drill chucks in hand-held or machine drills.

Advantages

The solid design offers improved durability and accurate centered drilling for consistent hole quality. A specially shaped cutting geometry and carbide insert concept provide high effectiveness and reduced load on the drill during cutting, while the double-twist flute promotes efficient chip evacuation for faster drilling progress in deep holes.

Suitable for

• Drilling through-holes and deep holes in steel and other ferrous metals
• Use with hand-held drills and drill presses with compatible chucks
• Applications requiring accurate, centered metal holes

Key specifications

• Diameter: 18 mm
• Total length: 210 mm
• Quantity: 1 piece
• Material compatibility: steel and other ferrous materials
• Flute type: double-twist for chip evacuation

How to use

Install the drill bit securely in a compatible chuck, ensuring correct centering and tight clamping. Begin drilling at low speed to establish a pilot groove, then increase speed and feed rate appropriate for the metal being drilled. Use steady pressure and allow the drill bit to cut without excessive force. For deep holes, periodically withdraw the bit to clear chips and prevent clogging of the flutes.

Usage recommendations

For best results, use cutting fluid or lubricant when drilling steel to reduce heat build-up and extend tool life. Match drill speed and feed to the material thickness and hardness, and inspect the bit for wear before use to maintain hole accuracy.