RUKO 1000030277 HSS-Co Twist Drill Bit 15.5 mm Reduced Shank 10 mm DIN 338

For machinists and metalworking professionals drilling alloyed steel, stainless steel, or cast iron, the RUKO 1000030277 precision-ground twist drill bit delivers reliable performance. Its 15.5 mm cutting diameter and reduced 10 mm shank fit standard drill chucks, while the 135° split point starts on contact without walking.

Key specifications

• Material: HSS-Co (5% cobalt high-speed steel)
• Drill bit type: Twist drill bit
• Standard: DIN 338
• Cutting diameter: 15.5 mm
• Shank type: Reduced shank
• Shank diameter: 10.0 mm
• Total length: 178 mm
• Flute length: 120 mm
• Point angle: 135°
• Point type: Split point (self-centering)
• Surface finish: Bright / uncoated
• Direction of cut: Right-hand cutting
• Tolerance: h8
• Manufacturing process: Precision ground

Why choose it

The cobalt alloyed steel withstands high drilling temperatures, extending tool life in demanding materials. The split point reduces thrust and improves hole accuracy, while the precision ground flutes ensure efficient chip evacuation.

Ideal use cases

• Drilling alloyed and unalloyed steel
• Stainless steel and cast iron
• Non-ferrous metals and plastics
• General purpose drilling in demanding materials

Good to know

Part of the RUKO 204 Series, this drill bit is supplied as a single piece. It is suitable for use with stationary drilling machines and hand drills with sufficient power.