Drill bit Irwin titanium-coated cylindrical 4 mm for metal, model 10502581

Irwin 4 mm titanium-coated cylindrical drill bit for metal (model 10502581) is engineered for drilling precise 4 mm holes in steel and other ferrous and non-ferrous metals. The titanium coating increases surface hardness and wear resistance, reducing flank wear and improving cutting life compared with uncoated bits. The cylindrical shank is compatible with standard three-jaw chucks on handheld and bench drills, making this drill bit suitable for metal fabrication, maintenance and repair tasks that require accurate small-diameter holes.

Advantages

The titanium coating provides enhanced hardness and heat resistance, which extends service life under repeated drilling in metal. The 4 mm diameter offers consistent hole size for fittings, fasteners and precision assemblies. A ground cutting tip promotes easy centering and reduced walking at startup, while the cylindrical shank delivers secure clamping in chuck systems. The combination of coating and geometry results in improved drilling performance and longer intervals between tool changes.

Suitable for

• Drilling steel plates, sheets and profiles
• Creating mounting holes for bolts, rivets and screws
• Maintenance and repair in workshops and industrial settings
• DIY metalworking and small fabrication projects

Key specifications

• Material compatibility: ferrous and non-ferrous metals
• Diameter: 4 mm
• Coating: titanium (Ti) surface treatment for increased wear resistance
• Shank type: cylindrical shank for standard chucks
• Tip geometry: ground point for improved centering and reduced walking

How to use

Select a drill speed appropriate for the metal being drilled and secure the workpiece to prevent movement. Install the cylindrical shank into a properly tightened chuck and ensure alignment with the work surface. Use cutting fluid or lubricant when drilling harder steels to reduce heat buildup and prolong bit life. Apply steady, moderate pressure and allow the drill bit to cut at its own rate; withdraw periodically to clear chips when drilling deeper holes.

Usage recommendations

For optimal life and hole quality, use appropriate cutting speeds and cooling when working with stainless or hardened steels, and replace the bit when wear reduces cutting efficiency. Store the drill bit in a protective holder to prevent damage to the cutting edges.