RUKO SPB-DIN338-10.9mm-HSSCo Twist Drill Bit

Drilling precise holes in tough materials like stainless steel or alloyed steel can quickly dull ordinary bits. This RUKO twist drill bit solves that with a cobalt-alloyed HSS (HSS-Co 5%) construction that withstands high temperatures and maintains sharpness longer.

Who is it for

Professionals and demanding DIYers who need reliable, accurate drilling in metals, including stainless steel, cast iron, and non-ferrous alloys. Ideal for workshop, industrial, or maintenance tasks where precision and durability are critical.

Main features

• DIN 338 standard dimensions for consistent performance
• 10.9 mm diameter with h8 tolerance for precise holes
• 135° split point reduces walking and requires less feed pressure
• Bright finish for clean chip evacuation and reduced friction
• Ground from solid for high concentricity and long life

Specifications

• Type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co 5% (M35)
• Diameter: 10.9 mm
• Total length: 142 mm
• Working length: 101 mm
• Shank diameter: 10.9 mm
• Shank type: Cylindrical
• Point angle: 135°
• Point type: Split point
• Surface treatment: Bright (uncoated)
• Manufacturing process: Ground from solid
• Tolerance: h8
• Cutting direction: Right-hand
• Flute type: Normal
• Recommended materials: Alloyed and unalloyed steel, stainless steel, cast iron, non-ferrous metals
• Packaging quantity: 1 piece

Tips

Use a cutting fluid when drilling stainless steel to extend bit life. For best results, start with a center punch or pilot hole to guide the split point accurately.