Drill bit set Irwin HSS cylindrical for metal — sizes 4, 5, 6, 8, 10 mm (MPN 10502234)

Set of Irwin HSS cylindrical shank drill bits in sizes 4, 5, 6, 8 and 10 mm designed for drilling a variety of metals. These high-speed steel (HSS) bits feature cylindrical shanks for use in standard drill chucks and deliver reliable cutting performance for steel, cast iron and non-ferrous metals. The kit is compact and practical for workshop, maintenance and metal fabrication tasks where straight, accurate holes are required.

Advantages

High-speed steel construction maintains a sharp cutting edge at elevated temperatures and provides good wear resistance during repeated drilling operations. Cylindrical shanks ensure compatibility with most handheld and bench drill chucks. The included range of diameters covers common hole sizes used in mechanical assembly, repair and fabrication work, reducing the need to change between multiple individual bits.

Suitable for

• Drilling mild and alloy steels
• Working with cast iron and non-ferrous metals (aluminium, copper, brass)
• Workshop maintenance and equipment repair
• Metal fabrication and assembly tasks

Key specifications

• Material: High-speed steel (HSS)
• Shank type: Cylindrical shank for standard drill chucks
• Included diameters: 4 mm, 5 mm, 6 mm, 8 mm, 10 mm
• Intended materials: Steel, cast iron, aluminium, copper, brass and other non-ferrous metals
• Application: General-purpose metal drilling

How to use

Select the drill bit diameter appropriate for the hole required and secure it in a clean, correctly sized drill chuck. Use a drill speed suitable for the material being worked — generally higher speeds for smaller diameters and softer metals, and lower speeds for larger diameters and harder steels. Apply steady, moderate feed pressure and ensure proper alignment to prevent breakage. For deeper holes or harder materials, use cutting fluid to reduce heat and prolong cutting edge life. After use, clean swarf from the flutes and store the bits in their case to protect the edges.

Usage recommendations

For best results when drilling steel and cast iron, use cutting lubricant and reduce speed for larger diameters. When drilling aluminium or other soft non-ferrous metals, clear chips frequently to avoid clogging and use medium speeds to maintain clean holes.