RUKO SPB-DIN338-8,75mm-HSSCo kierreporanterä

For machinists and metalworkers drilling precise holes in tough alloys, the RUKO SPB-DIN338-8.75mm-HSSCo twist drill bit delivers reliable performance. Its 5% cobalt high-speed steel construction withstands high temperatures, making it suitable for stainless steel, cast iron, and other hard materials up to 1100 N/mm². The split point tip reduces walking and enables accurate starts without center punching, while the fully ground flutes ensure efficient chip evacuation and a smooth finish.

Key specifications

• Diameter: 8.75 mm
• Total length: 125 mm
• Working length: 81 mm
• Material: HSS-Co (5% cobalt)
• Point angle: 135° split point
• Shank: Cylindrical, 8.75 mm
• Standard: DIN 338
• Tolerance: h8

Why choose it

The cobalt alloy provides superior heat resistance and wear life compared to standard HSS, allowing higher cutting speeds and longer tool life. The split point geometry centers the bit on contact, reducing the need for pilot holes and improving hole position accuracy.

Ideal use cases

• Drilling stainless steel and alloyed steels
• Maintenance and repair in workshops
• Production drilling in manufacturing
• General metalworking on cast iron and non-ferrous metals

Good to know

This drill bit is fully ground from solid HSS-Co for consistent geometry and sharpness. It is suitable for use in drill presses, lathes, and hand-held drills with appropriate clamping.