RUKO SPB-DIN338-5/16-HSSCo 8,0 mm cobalt spiraalboor DIN 338

Precision-ground 8.0 mm (5/16") HSS-Co twist drill bit with 135° split point for fast, accurate drilling in tough materials.

Overview

The RUKO SPB-DIN338-5/16-HSSCo is a fully ground twist drill bit made from high-speed steel with 5% cobalt (HSS-Co). It conforms to DIN 338, the standard for short series twist drills, ensuring consistent quality and geometry. The 135° split point reduces walking and requires less thrust, making it ideal for precise hole positioning.

What stands out

• 5% cobalt alloy withstands high temperatures, extending tool life in demanding applications.
• Bright, uncoated finish reduces chip adhesion and allows easy resharpening.
• Cylindrical shank fits standard drill chucks for cordless drills, electric drills, and drill presses.
• Suitable for stainless steel, alloyed steel, cast iron, and non-ferrous metals.

Technical details

• Diameter: 5/16 inch (8.0 mm)
• Overall length: 117 mm
• Flute length: 75 mm
• Point angle: 135°
• Cutting direction: Right-hand
• Standard: DIN 338
• Material: HSS-Co (5% cobalt)
• Surface finish: Bright
• Manufacturing process: Fully ground

Our verdict

A professional-grade cobalt drill bit that delivers clean, accurate holes in hard metals. The 135° split point and high cobalt content make it a reliable choice for workshops and demanding DIY projects.