Drill bit Proline HSS cylindrical for metal 18.5 mm (ZR76185)

The Proline HSS cylindrical drill bit for metal, 18.5 mm diameter, is a straight-shank cutting tool designed for drilling steel and other ferrous and non-ferrous metals. Manufactured from high-speed steel (HSS), the bit provides a balance of hardness and toughness suited to common workshop and industrial drilling tasks. Its cylindrical shank fits standard chucks on handheld drills and drill presses, enabling use in both portable and stationary equipment for through and blind hole applications in fabrication, maintenance and repair, and general metalworking.

Advantages

The high-speed steel construction offers wear resistance and retains cutting edge hardness at typical drilling temperatures, allowing reliable performance when drilling medium-hard metals. The straight cylindrical shank ensures secure chucking and straightforward alignment in both hand drills and drill presses. The 18.5 mm diameter is useful for medium-to-large hole requirements where strength and rigidity are needed to reduce deflection during cutting. The simple, single-piece design minimises vibration and facilitates straightforward sharpening when required.

Suitable for

• Drilling through holes and blind holes in steel plates and metal components
• Workshop fabrication and assembly tasks
• Maintenance and repair operations on machinery and structures
• Use with handheld electric drills and drill presses

Key specifications

• Material: High-speed steel (HSS)
• Diameter: 18.5 mm
• Shank type: Cylindrical / straight shank for standard chucks
• Intended use: Metal drilling (ferrous and non-ferrous)
• Suitable hole types: Through holes and blind holes

How to use

Secure the drill bit in the chuck of a handheld drill or drill press, ensuring proper centring and tight clamping. Select an appropriate rotational speed and apply steady feed pressure according to the metal being drilled—slower speeds for harder steels, higher speeds for softer alloys. Use cutting fluid or lubricant to reduce heat and improve tool life when drilling steel. Withdraw periodically to clear chips when making deep holes, and check hole size and alignment as you progress.

Usage recommendations

For best results, use a quality cutting fluid and moderate speed to extend bit life. When drilling hardened steels or working at high temperatures, consider pre-drilling with smaller pilot sizes and perform finishing passes as needed. Inspect the cutting edges periodically and resharpen or replace the bit when wear or chipping affects hole quality.