Drill bit Art-Pol HSS cylindrical 4 mm for metal, model AR53940

Art-Pol HSS cylindrical drill bit, 4 mm diameter, designed specifically for drilling metal. Made from high-speed steel (HSS) to provide improved wear resistance and heat tolerance during cutting operations. The 4 mm cylindrical shank is compatible with most hand drills and drill presses and is intended for use on steel, cast iron and non-ferrous metals in workshop repair, metal fabrication and maintenance environments.

Advantages

The HSS material offers good hardness and thermal resistance for sustained drilling in metal, reducing wear and maintaining cutting performance. The cylindrical shank ensures secure clamping in standard chucks, while the 4 mm diameter provides a common size for pilot holes and smaller through-holes. Its geometry is optimized for metalworking to deliver consistent chip evacuation and reliable hole quality under normal workshop conditions.

Suitable for

• Drilling holes in steel and cast iron
• Working with non-ferrous metals such as aluminum and brass
• Pilot holes for tapping and fastening
• Workshop repairs and maintenance tasks
• Use in hand drills and drill presses

Key specifications

• Material: high-speed steel (HSS)
• Tip type: twist drill geometry suitable for metal
• Shank type: cylindrical
• Diameter: 4 mm
• Typical applications: drilling in ferrous and non-ferrous metals

How to use

Secure the drill bit in the chuck of a hand drill or drill press, ensuring the cylindrical shank is fully inserted and tightened. Mark and center the drilling point, use a center punch if precise positioning is required, and start drilling at a moderate speed appropriate for the workpiece material. Apply steady, even pressure and allow the bit to cut without forcing; withdraw periodically to clear chips and reduce heat buildup. For larger depths or harder materials, use cutting fluid to improve cooling and chip evacuation.

Usage recommendations

For best results when drilling steel or other hard metals, use appropriate cutting lubricant, moderate spindle speed and incremental pecking for deeper holes. Inspect the bit for wear or chipping before use and replace when edge condition degrades to maintain hole quality and safety.