RUKO SPB-DIN338-13/64-HSSCo 5.16mm Cobalt Twist Drill Bit

Drilling into tough materials like stainless steel or high-strength alloys quickly dulls ordinary bits, causing wandering, overheating, and premature failure. The RUKO SPB-DIN338-13/64-HSSCo twist drill bit solves this with 5% cobalt-alloyed high-speed steel, a 135° split point, and precision grinding to stay sharp and accurate under high heat and pressure.

Who is it for

Professional machinists, metal fabricators, and serious DIYers who need reliable, long-lasting performance in steel, stainless steel, cast iron, non-ferrous metals, and plastics.

Main features

• 5% cobalt HSS-Co steel withstands high temperatures and maintains hardness
• 135° split point (Type C) self-centers and reduces walking on contact
• Ground from solid with h8 tolerance for precise holes
• Bright finish reduces friction and improves chip flow
• DIN 338 standard ensures compatibility with standard drill chucks

Specifications

• Drill diameter: 13/64 inch (5.16 mm)
• Shank diameter: 5.16 mm (cylindrical)
• Total length: 86 mm
• Working length: 52 mm
• Point angle: 135°
• Point grind: Split point (Type C)
• Flute type: Right-hand spiral
• Material: HSS-Co (5% cobalt)
• Standard: DIN 338
• Tolerance: h8
• Manufacturing process: Ground from solid
• Recommended for: Steel, stainless steel, cast iron, non-ferrous metals, plastics
• Max tensile strength: Up to 1100 N/mm²

Tips

Use cutting fluid or coolant when drilling hard materials to extend bit life and improve hole quality. For stainless steel, reduce speed and apply steady pressure to avoid work hardening.