RUKO SPB-DIN338 6,6 mm broca helicoidal HSS-Co

Machinists and metalworking professionals rely on the RUKO SPB-DIN338 6.6mm HSS-Co twist drill bit for precise holes in tough materials. Its cobalt-alloyed high-speed steel and split point grind deliver accurate starts and long life in industrial drilling tasks.

Key specifications

• Drill bit type: Twist drill bit
• Material: HSS-Co (high-speed steel with cobalt)
• Standard: DIN 338
• Diameter: 6.6 mm
• Total length: 109 mm
• Flute length: 69 mm
• Shank type: Cylindrical (straight shank)
• Point angle: 130°
• Point grind: Split point (cross-ground)
• Cutting direction: Right-hand cut
• Tolerance: h8
• Surface finish: Bright
• Manufacturing process: Ground from solid
• Application materials: Alloyed and unalloyed steel, stainless steel, cast iron, non-ferrous metals
• Maximum tensile strength: 1100 N/mm²
• Recommended use: Industrial, professional

Why choose it

The cobalt alloy enhances heat resistance and wear resistance, allowing higher cutting speeds and longer tool life compared to standard HSS. The split point reduces walking and enables precise hole positioning without centre punching.

Ideal use cases

• Drilling stainless steel components in fabrication shops
• Creating precise holes in alloy steel for machinery repair
• Working with cast iron and non-ferrous metals in maintenance tasks

Good to know

This drill bit is ground from solid HSS-Co stock to DIN 338 dimensions, ensuring consistent quality and performance. It is supplied as a single piece for professional use.