RUKO SPB-DIN338-HSS-TiN σπειροειδές τρυπάνι 7,1 mm

Precision drilling in tough materials demands a bit that stays sharp and resists heat. The RUKO SPB-DIN338-HSS-TiN twist drill bit with 7.1 mm diameter is ground from solid high-speed steel and coated with titanium nitride for reduced friction and longer life.

Who is it for

Machinists, metalworkers, and serious DIYers who need reliable holes in steel, cast iron, non-ferrous metals, plastics, and wood. The TiN coating makes it especially suited for repetitive drilling where heat buildup dulls ordinary bits.

Main features

• 7.1 mm diameter with cylindrical shank, DIN 338 standard
• High-speed steel (HSS) body with gold titanium nitride (TiN) coating
• 135° split point for accurate starting and reduced walking
• Right-hand cutting direction, ground from solid for precision
• Overall length 109 mm, flute length 69 mm
• h8 shank tolerance for secure chuck grip

Specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: High-speed steel (HSS)
• Coating: Titanium nitride (TiN)
• Diameter: 7.1 mm
• Shank type: Cylindrical
• Shank diameter: 7.1 mm
• Overall length: 109 mm
• Flute length: 69 mm
• Point angle: 135°
• Tolerance: h8
• Cutting direction: Right-hand cutting
• Manufacturing process: Ground from solid
• Colour: Gold
• Recommended materials: Steel, cast iron, non-ferrous metals, plastics, wood
• Max material hardness: 900 N/mm²

Tips

Use a cutting fluid when drilling steel to extend bit life and improve finish. For deep holes, withdraw the bit periodically to clear chips and prevent overheating.