RUKO SPB-DIN338-HSSCo8-Ø11.0mm HSS-Co 8% Cobalt Twist Drill Bit, DIN 338, 11 mm Diameter, 142 mm Length, Right-Hand Spiral, 135° Point Angle, Bright Finish

Drilling through tough materials like stainless steel or acid-resistant alloys quickly dulls ordinary bits, causing wandering, overheating, and premature failure. The RUKO SPB-DIN338-HSSCo8-Ø11.0mm twist drill bit is engineered with 8% cobalt-alloyed high-speed steel to maintain hardness at high temperatures, delivering clean, accurate holes in demanding metals.

Who is it for

Professional machinists, metal fabricators, and serious DIYers who regularly drill alloyed and unalloyed steel, stainless steel, cast iron, and non-ferrous metals. It suits corded drills, cordless drills, and drill presses.

Main features

• HSS-Co 8% cobalt alloy for high heat resistance and wear resistance.
• DIN 338 standard geometry with 135° self-centering point reduces walking.
• Right-hand spiral flute design for efficient chip evacuation.
• Ground from solid with h8 shank tolerance for precise chuck fit.
• Bright finish for clean, friction-reducing surface.

Specifications

• Drill bit type: Twist drill bit
• Material: HSS-Co 8% (high-speed steel with 8% cobalt)
• Diameter: 11.0 mm
• Total length: 142 mm
• Flute length: 101 mm
• Shank type: Cylindrical
• Point angle: 135°
• Flute type: Right-hand spiral
• Surface finish: Bright
• Tolerance: h8
• Self-centering: Yes
• Heat resistance: High
• Wear resistance: High
• Compatibility: Corded drills, cordless drills, drill presses
• Packaging: Single unit

Tips

Use cutting fluid when drilling stainless or acid-resistant steels to extend bit life. Reduce speed for larger diameters and apply steady, even pressure. For deep holes, retract periodically to clear chips and prevent binding.