Drill Bit Irwin HSS Cylindrical 3.1 mm for Metal, model 10502207

Irwin HSS cylindrical drill bit 3.1 mm is designed for drilling metal with reliability and precision. Manufactured from high-speed steel (HSS), this 3.1 mm drill bit provides wear resistance and maintains cutting performance at elevated temperatures. The cylindrical shank ensures secure mounting in standard chucks, making the bit suitable for a variety of metalworking tasks in workshops, maintenance and repair operations, and light industrial use.

Advantages

The high-speed steel construction offers a balance of hardness and toughness for effective cutting of steel and non-ferrous metals while resisting heat-induced softening. The cylindrical shank allows stable clamping in drill chucks and hand drills, reducing runout and improving hole accuracy. The 3.1 mm diameter is useful for precision holes, pilot drilling and applications that require a small, consistent hole size.

Suitable for

• Drilling holes in mild and alloy steels
• Pilot holes for tapping and fastening
• Drilling in non-ferrous metals such as aluminum and brass
• General workshop maintenance and repair tasks

Key specifications

• Material: high-speed steel (HSS)
• Diameter: 3.1 mm
• Shank type: cylindrical
• Intended material: metals (steel and non-ferrous metals)
• Typical use: general-purpose metal drilling, pilot holes

How to use

Secure the drill bit in a compatible chuck, ensuring the cylindrical shank is inserted fully and tightened to minimize runout. Select an appropriate drilling speed and feed for the metal being drilled—lower speeds for harder steels and higher speeds for softer, non-ferrous metals. Use cutting fluid or lubricant when drilling steel to reduce heat and extend bit life. Apply steady pressure, withdraw periodically to clear chips, and finish the hole with light passes for best surface quality.

Usage recommendations

For improved tool life and hole accuracy, pre-mark the drilling location, pilot where necessary, and use cutting fluid when working with ferrous metals. Replace the bit if wear or chipping reduces cutting performance, and store bits dry to prevent corrosion.