Drill Bit Set AWTools AW42225 — cobalt metal drill bits, 25 pcs

AWTools AW42225 is a set of 25 cobalt metal drill bits designed for drilling a wide range of metals. The kit includes a spectrum of metric sizes in high-speed steel with a cobalt alloy formulation that increases hardness and heat resistance compared with standard HSS bits. These properties make the set suitable for cutting stainless steel, hardened steel, cast iron and other tough materials commonly encountered in workshops and maintenance environments.

Advantages

The cobalt alloy composition improves wear resistance and maintains cutting geometry at elevated temperatures, reducing breakage and extending bit life during heavy-duty drilling. Precision-ground flutes and a standard 118° point angle provide efficient chip evacuation and reliable centring on metal surfaces. Supplied as a matched assortment of sizes, the set eliminates the need to change tool types when moving between small pilot holes and larger diameter work.

Suitable for

• Drilling stainless steel and hardened steels
• Workshop and industrial maintenance tasks
• Metal fabrication and machine-shop applications
• Repair and assembly works requiring durable drill bits

Key specifications

• Set quantity: 25 pieces covering a range of metric diameters
• Material: high-speed steel with cobalt alloy
• Tip geometry: 118° point for general-purpose metal drilling
• Shank type: cylindrical shank compatible with standard chucks
• Suitable materials: stainless steel, hardened steel, cast iron, non-ferrous metals

How to use

Select the appropriate drill bit size for the hole required, secure the workpiece, and clamp it to prevent movement. Use a drill press or hand drill with a suitable chuck that accepts cylindrical shanks. For best results when drilling stainless or hardened steels, start with a small pilot hole and use moderate feed pressure with steady speed. Apply cutting fluid or coolant to reduce heat build-up and prolong bit life. Withdraw the bit periodically to clear chips and avoid clogging the flutes.

Usage recommendations

For prolonged bit life when working with hard metals, use a lower RPM and consistent cutting fluid. Replace worn bits to maintain hole accuracy and reduce the risk of breakage.