RUKO SPB-DIN338-HSS-G-Kreuz-31/64 Broca helicoidal 31/64 pulgadas (12,3 mm) DIN 338 HSS-G afilado en cruz

Precision drilling in tough metals demands a bit that won’t wander or dull quickly. The RUKO SPB-DIN338-HSS-G-Kreuz-31/64 twist drill bit tackles steel, cast iron, non-ferrous metals, and plastics with a self-centering split point and fully ground flutes for clean, accurate holes.

Who is it for

Machinists, metalworkers, and serious DIYers who need a reliable 31/64" (12.30 mm) drill bit for production or repair work. Its DIN 338 dimensions fit standard drill chucks and collets.

Main features

• High-speed steel (HSS-G) body, bright finish, fully ground for precision
• 135° split point starts on contact, reduces walking and thrust pressure
• Right-hand cutting, cylindrical shank, h8 tolerance for secure chuck grip
• DIN 338 standard: 151 mm overall length, 101 mm flute length

Specifications

• Drill bit type: Twist drill bit
• Material: High-speed steel (HSS-G)
• Standard: DIN 338
• Diameter: 31/64 inch (12.30 mm)
• Shank type: Cylindrical
• Shank diameter: 31/64 inch (12.30 mm)
• Point angle: 135°
• Point grind: Split point (self-centering)
• Cutting direction: Right-hand
• Surface finish: Bright / uncoated
• Tolerance: h8
• Overall length: 151 mm
• Flute length: 101 mm
• Manufacturing process: Fully ground
• Recommended application: Steel, cast iron, non-ferrous metals, plastics

Tips

Use a center punch on hard steel to give the split point a starting dimple, and apply cutting fluid to extend bit life. For deep holes, retract periodically to clear chips.