Drill bit Irwin HSS cylindrical 4 mm for metal, model 1863348

Irwin HSS cylindrical 4 mm drill bit model 1863348 is designed for precise drilling in metal. Made from high-speed steel (HSS), the bit combines wear resistance and heat tolerance to maintain cutting performance when working with ferrous and non-ferrous metals. The cylindrical shank fits standard drill chucks and is suitable for workshop, maintenance and DIY metalworking tasks that require accurate 4 mm holes.

Advantages

The HSS material ensures high hardness and thermal stability during continuous drilling, reducing premature wear and maintaining edge sharpness. The cylindrical shank provides secure fitting in most drill chucks and eases bit changes. The 4 mm diameter offers a balance between precision and strength for small through-holes and pilot drilling. The straight flute geometry facilitates chip evacuation and stable drilling performance in thin and medium-thickness metal sheets.

Suitable for

• Drilling holes in steel, stainless steel and non-ferrous metals
• Pilot holes for screws, bolts and rivets
• Workshop fabrication and metal maintenance tasks
• DIY metalworking projects requiring accurate 4 mm holes

Key specifications

• Material: High-speed steel (HSS)
• Diameter: 4 mm
• Shank type: Cylindrical (smooth)
• Intended use: Drilling metal (ferrous and non-ferrous)
• Flute type: Straight flute for chip removal

How to use

Mark the drilling position and secure the workpiece to prevent movement. Select an appropriate drill speed for the metal type—lower speeds for harder steels, higher speeds for softer non-ferrous metals. Use steady, moderate pressure and allow the bit to cut without excessive force. Periodically withdraw the bit to clear chips and reduce heat build-up. For thicker or harder materials, use cutting fluid to improve cooling and prolong bit life. After use, clean and store the bit in a dry place to avoid corrosion.

Usage recommendations

For best results, match drill speed to material hardness, apply cutting fluid on harder alloys, and avoid excessive side loads to maintain drill geometry and prolong service life.