Irwin 10502562 HSS Cobalt Drill Bit 8.5 x 117 mm

This cobalt HSS drill bit is designed for high-performance drilling in hard metals such as stainless steel and high-strength alloys. Made from HSS steel with 5% cobalt, it offers enhanced durability and heat resistance for demanding applications. The bit features a 135° split point for precise centering, a gold tempered finish, and a defined working length of 75 mm with an overall length of 117 mm and a diameter of 8.5 mm. Its cylindrical shank and robust construction support use with standard drills and drill presses, making it suitable for drilling alloyed steel, stainless steel, and metal. The combination of cobalt alloying and optimized geometry aims to deliver extended tool life and reliable performance under challenging metal-cutting conditions.

Features

• Cobalt alloyed HSS with 5% cobalt
• Diameter 8.5 mm
• Overall length 117 mm
• Working length 75 mm
• 135° split point for centering
• Gold tempered surface finish

Technical specifications

• Material: HSS with 5% cobalt
• Point angle: 135°
• Finish: Gold surface treatment
• Shank type: Cylindrical
• Compatible with standard drills and drill presses
• Suitable for alloyed steel, stainless steel, and metal

Use with proper cutting fluid to reduce heat and prolong tool life; ensure the drill is set to appropriate speed and start drilling at a low speed, then increase.