Broca helicoidal RUKO HSS-G DIN 338, 6,9 mm, afiação em cruz

Precision drilling in tough materials demands a bit that stays sharp, cuts clean, and lasts. The RUKO SPB-DIN338-HSS-G-Kreuz-6,9mm is a ground twist drill bit engineered for reliable performance in steel, cast steel, grey cast iron, malleable cast iron, non-ferrous metals, and hard plastics up to 900 N/mm² tensile strength.

Who is it for

Metalworkers, machinists, and serious DIYers who need a dependable 6.9 mm bit for accurate holes in metal and hard plastics. Its split point design reduces walking and improves centering, making it ideal for precise drilling tasks.

Main features

• Diameter: 6.9 mm with h8 tolerance for consistent sizing
• Overall length: 109 mm, flute length: 69 mm
• 135° split point (Kreuzanschliff) for self-centering and reduced thrust
• Ground from high-speed steel (HSS-G) for durability and sharpness
• Bright finish, right-hand cutting, type N helix

Specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: High-speed steel (HSS)
• Manufacturing process: Ground (HSS-G)
• Point type: Split point (DIN 1412 C)
• Point angle: 135°
• Helix angle: Type N
• Shank type: Cylindrical
• Cutting direction: Right-hand
• Tolerance: h8
• Max tensile strength: 900 N/mm²
• Packaging: Single piece

Tips

Use cutting fluid when drilling steel to prolong bit life and improve finish. For best results, drill a pilot hole with a smaller bit before using the 6.9 mm bit in hard materials.