RUKO LOS-HSSCo-59mm Twist Drill Bit 5.9mm DIN 338 HSS-Co

Professional machinists and industrial workshops rely on the RUKO LOS-HSSCo-59mm twist drill bit for precise, efficient drilling in tough materials. Its 5.9 mm diameter and HSS-Co construction make it a dependable choice for daily use on alloyed and unalloyed steel, stainless steel, cast iron, non-ferrous metals, and plastics.

Key specifications

• Diameter: 5.9 mm
• Total length: 93 mm
• Flute length: 57 mm
• Material: High-speed steel cobalt (HSS-Co)
• Standard: DIN 338
• Point angle: 135°
• Point type: Split point (self-centering)
• Shank type: Cylindrical (straight shank)
• Flute type: Right-hand spiral
• Surface finish: Bright / uncoated
• Manufacturing process: Fully ground
• Tolerance: h8

Why choose it

The cobalt alloyed HSS delivers high heat resistance and excellent wear resistance, ensuring long tool life even under demanding conditions. The 135° split point reduces walking and allows accurate hole positioning without a center punch. Fully ground flutes provide smooth chip evacuation and precise hole quality.

Ideal use cases

• Drilling alloyed and unalloyed steel up to 1100 N/mm² tensile strength
• Stainless steel and cast iron
• Non-ferrous metals and plastics
• General purpose industrial and professional drilling

Good to know

For optimal performance and extended tool life, use a suitable coolant during drilling. The drill bit is supplied as a single piece and conforms to DIN 338 for standard dimensions and geometry.