RUKO KEB-HSSCo-Mod.30-39.0mm Twist Drill Bit | DIN 338 | 39.0 mm | HSSCo

Drill a 39.0 mm hole in tough steel with this RUKO twist drill bit, made from high-speed steel with cobalt for high heat resistance and long life. Ground from solid to DIN 338, it features a type N helix and a 118° point angle for accurate, efficient drilling in alloyed and unalloyed steel, cast iron, non-ferrous metals, and plastics.

Overview

The KEB-HSSCo-Mod.30-39.0mm is a general-purpose twist drill bit with a cylindrical shank and a bright, uncoated surface. Its 39.0 mm diameter is held to h8 tolerance, and the bit measures 305 mm overall with a 195 mm flute length. The right-hand cutting direction suits standard drilling machines and hand drills.

What stands out

• Cobalt-alloyed HSS for high heat resistance and durability
• Ground from solid for precise geometry and concentricity
• DIN 338 standard dimensions ensure compatibility with standard chucks
• Type N helix with 118° point angle for general-purpose drilling

Technical details

• Drill bit type: Twist drill bit
• Material: High-speed steel with cobalt (HSSCo)
• Standard: DIN 338
• Drill diameter: 39.0 mm
• Shank type: Cylindrical shank
• Shank diameter: 39.0 mm
• Helix angle type: Type N (normal helix)
• Point angle: 118°
• Surface finish: Bright / uncoated
• Cutting direction: Right-hand cut
• Overall length: 305 mm
• Flute length: 195 mm
• Tolerance: h8
• Cobalt content: 5-8%
• Manufacturing process: Ground from solid
• Suitable materials: Alloyed and unalloyed steel, cast iron, non-ferrous metals, plastics
• Heat resistance: High
• Application: General purpose drilling
• Drill point grind: Standard conical point

Our verdict

With its cobalt-alloyed steel and precise grinding, this RUKO drill bit is a reliable choice for demanding metal drilling tasks. The large 39.0 mm diameter and DIN 338 compliance make it a practical addition to any workshop.