RUKO SPB-DIN338-8,4mm-HSSCo Broca helicoidal

With a 130° split point and 5% cobalt HSS, this 8.4 mm twist drill bit starts fast and resists heat in tough alloys.

Overview

The RUKO SPB-DIN338-8.4mm-HSSCo is a precision twist drill bit engineered for demanding metal drilling. Its 5% cobalt high-speed steel construction provides excellent heat resistance and wear protection, making it suitable for stainless steel, alloyed steel, unalloyed steel, cast iron, and non-ferrous metals. The 130° split point ensures accurate centering and reduces walking, while the fully ground flutes deliver efficient chip evacuation.

What stands out

• 5% cobalt HSS for high-temperature performance
• 130° split point for precise starts without center punching
• DIN 338 standard geometry with h8 tolerance for consistent hole quality
• Bright finish and fully ground for smooth cutting

Technical details

• Diameter: 8.4 mm
• Total length: 117 mm
• Flute length: 75 mm
• Shank: cylindrical (straight)
• Point angle: 130°
• Point type: split point
• Cutting direction: right-hand
• Material: HSS-Co (5% cobalt)
• Standard: DIN 338
• Tolerance: h8
• Surface finish: bright
• Manufacturing process: fully ground

Our verdict

A reliable cobalt drill bit for professional metalworking, offering precise starts and long life in hard materials.