RUKO SPB-DIN338-HSSCo8-Ø6.4mm HSS-Co8 Twist Drill Bit 6.4 mm DIN 338

The RUKO SPB-DIN338-HSSCo8-Ø6.4mm stands apart from conventional twist drills through its 8% cobalt alloy, which maintains hardness at elevated temperatures and resists wear in tough materials. Fully ground from solid HSS-Co8, it delivers precise holes in stainless and alloyed steels where standard HSS bits dull quickly.

Highlights

• Diameter: 6.4 mm with h8 tolerance for consistent hole size
• Self-centering 135° split point reduces walking and needs less pilot drilling
• Right-hand cutting, cylindrical shank for standard drill chucks
• DIN 338 geometry: 101 mm overall length, 63 mm flute length
• Bright finish, fully ground flutes for efficient chip evacuation

In daily use

This bit suits maintenance, metalworking, and fabrication tasks involving stainless steel, alloyed steel, cast iron, non-ferrous metals, and plastics. The split point starts on contact with minimal pressure, while the cobalt substrate withstands temperatures that would soften ordinary HSS, extending edge life in continuous production.

Full specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co 8% (high-speed steel with 8% cobalt)
• Diameter: 6.4 mm
• Shank type: Cylindrical
• Shank diameter: 6.4 mm
• Point angle: 135°
• Cutting direction: Right-hand cutting
• Surface finish: Bright
• Manufacturing process: Fully ground
• Overall length: 101 mm
• Flute length: 63 mm
• Tolerance: h8
• Recommended materials: Stainless steel, alloyed steel, cast iron, non-ferrous metals, plastics
• Max tensile strength: Up to 1100 N/mm²
• Heat resistance: High
• Wear resistance: High

Final note

For professionals who drill stainless and high-strength steels regularly, the RUKO SPB-DIN338-HSSCo8-Ø6.4mm offers the heat and wear resistance needed for clean, accurate holes over a long service life.