Irwin HSS Metal Twist Drill Bit 8 mm, cylindrical shank, model 1863361

Irwin HSS Metal Twist Drill Bit 8 mm with a cylindrical shank is a high-speed steel cutting tool designed for drilling holes in steel and other metals. The 8 mm diameter and standard twist geometry provide efficient chip evacuation and consistent hole quality when used with hand drills or drill presses. Constructed from HSS material, this drill bit offers enhanced wear resistance and higher heat tolerance compared to carbon steel bits, making it suited for general metal fabrication, repair and maintenance tasks.

Advantages

The HSS construction ensures better hardness and thermal stability during prolonged drilling, while the precision-ground flutes and point geometry promote accurate centering and reduced walking. The cylindrical shank fits common three-jaw chucks and provides stable clamping. Overall, the design balances durability and cutting performance for routine metalworking operations.

Suitable for

• Drilling holes in mild and alloy steels
• Workshop repair and maintenance
• Metal fabrication and assembly tasks
• Use with hand drills and drill presses equipped with compatible chucks

Key specifications

• Material: high-speed steel (HSS)
• Diameter: 8 mm
• Shank type: cylindrical shank compatible with standard chucks
• Tip type: conventional twist point for general-purpose metal drilling
• Typical applications: cutting and drilling through ferrous and non-ferrous metals

How to use

Secure the drill bit in the chuck ensuring the shank is fully seated and tightened. When drilling metal, mark the drilling point and use a center punch if precise starting location is required. Start at low to moderate speed to establish the hole, then increase speed according to material thickness and drill diameter while applying steady pressure. Use cutting fluid or coolant to reduce heat and extend tool life, and withdraw the bit occasionally to clear chips for deeper holes.

Usage recommendations

For best results, select drilling speeds appropriate for the metal being machined and use suitable coolant. Inspect the bit for wear or dullness before use and replace when cutting performance declines to maintain hole accuracy and surface finish.