RUKO KEB-HSSCo-Mod.55-27.0mm HSS-Co Twist Drill Bit DIN 338

Drilling large-diameter holes in tough steel or cast iron demands a bit that stays sharp and true under heat and load. The RUKO KEB-HSSCo-Mod.55-27.0mm answers with a fully ground HSS-Co twist drill bit built for industrial drilling and workshop use. Its 5% cobalt alloy and 135° split point reduce walking and improve chip evacuation, while the bright finish and h8 tolerance deliver clean, accurate bores in alloyed and unalloyed steel, cast iron, non-ferrous metals, and plastics.

Who is it for

Machinists, metal fabricators, and serious workshop users who need a reliable 27.0 mm drill bit for precise, repeatable holes in demanding materials.

Main features

• High-speed steel with 5% cobalt for heat resistance and durability
• Fully ground flutes and 135° point angle for accurate centering
• Cylindrical shank with h8 tolerance fits standard drill chucks
• Right-hand cutting, Type N helix for efficient chip removal
• Bright finish reduces friction and resists corrosion

Specifications

• Product type: Twist drill bit
• Material: HSS-Co (5% cobalt)
• Standard: DIN 338
• Series/Model: Mod. 55
• Drill diameter: 27.0 mm
• Shank type: Cylindrical
• Shank diameter: 27.0 mm
• Overall length: 243 mm
• Flute length: 165 mm
• Point angle: 135°
• Helix angle type: Type N
• Surface treatment: Bright finish
• Manufacturing method: Fully ground
• Tolerance: h8
• Cutting direction: Right-hand cutting
• Number of flutes: 2
• Suitable materials: Alloyed and unalloyed steel, cast iron, non-ferrous metals, plastics

Tips

Use a rigid setup and adequate coolant when drilling steel to maximize bit life. For deep holes, peck drilling helps clear chips and prevent overheating.