RUKO SPB-DIN338 7,1 mm HSS-Co kierreporanterä

Precision drilling in tough steels demands a bit that stays sharp and centered. The RUKO SPB-DIN338 7.1 mm HSS-Co twist drill bit solves that with a cobalt-alloyed high-speed steel body and a 135° split point, delivering clean, accurate holes in materials up to 1100 N/mm² tensile strength.

Who is it for

Industrial and professional users who regularly drill alloyed and unalloyed steel, stainless steel, cast iron, non-ferrous metals, and plastics. The 5% cobalt content provides high heat resistance, making this bit suitable for demanding workshop and production environments.

Main features

• DIN 338 conformance for standard dimensions and tolerances
• HSS-Co with 5% cobalt for high heat resistance and durability
• 135° split point for self-centering and reduced walking
• Bright, uncoated surface for clean chip evacuation
• Ground from solid for consistent quality and precision
• Cylindrical shank fits standard drill chucks

Specifications

• Drill bit type: Twist drill bit
• Diameter: 7.1 mm
• Total length: 109 mm
• Working length: 69 mm
• Material: HSS-Co (5% cobalt)
• Point angle: 135°
• Point grind: Split point
• Cutting direction: Right-hand
• Diameter tolerance: h8
• Max tensile strength: 1100 N/mm²

Tips

Use appropriate cutting fluid when drilling stainless steel or high-strength alloys to extend tool life. For best results, start with a center punch or pilot hole if precise positioning is critical.