Broca helicoidal RUKO DIN 338 HSS-G afiação em cruz 8,7 mm

Drilling precise holes in tough materials like alloyed steel or cast iron demands a bit that stays sharp, centers accurately, and resists walking. The RUKO DIN 338 HSS-G split point twist drill bit meets that challenge with a 135° split point that bites instantly and a ground-from-solid high-speed steel body that holds its edge.

Who is it for

This bit is built for metalworkers, maintenance technicians, and serious DIYers who need reliable, repeatable holes in steel, cast iron, non-ferrous metals, and plastics. Its cylindrical shank fits standard drill chucks, and the h8 tolerance ensures a consistent diameter for precision work.

Main features

• Split point (Kreuzanschliff) with 135° angle for self-centering and reduced thrust
• Ground from solid HSS-G for high hardness and wear resistance
• DIN 338 standard dimensions: 8.7 mm diameter, 125 mm total length, 81 mm flute length
• Right-hand cutting, bright finish
• Suitable for alloyed and unalloyed steel up to 900 N/mm², cast iron, non-ferrous metals, and plastics

Specifications

• Drill bit type: Twist drill bit
• Material: High-speed steel (HSS-G)
• Manufacturing process: Ground from solid
• Standard: DIN 338
• Diameter: 8.7 mm
• Total length: 125 mm
• Working length (flute length): 81 mm
• Shank type: Cylindrical
• Point angle: 135°
• Point type: Split point
• Cutting direction: Right-hand cutting
• Surface finish: Bright
• Tolerance: h8
• Recommended materials: Steel (alloyed/unalloyed up to 900 N/mm²), cast iron, non-ferrous metals, plastics

Tips

Use a cutting fluid when drilling steel to extend bit life and improve hole quality. For deep holes, withdraw the bit periodically to clear chips. The split point minimizes center punching, but a light punch can still help on hard surfaces.