RUKO SPB-DIN338-HSS-TiN Twist Drill Bit 7.7 mm

Drilling precise holes in tough materials demands a bit that stays sharp and resists heat. The RUKO SPB-DIN338-HSS-TiN twist drill bit delivers reliable performance for general-purpose drilling in steel, cast iron, non-ferrous metals, and plastics. Its titanium nitride coating reduces friction and improves wear resistance, extending tool life and maintaining accuracy.

Who is it for

Metalworkers, machinists, and serious DIYers who need a durable, high-speed steel bit for everyday drilling tasks. This bit is ideal for those who value precision and longevity in their cutting tools.

Main features

• High-speed steel (HSS) body with titanium nitride (TiN) coating for enhanced hardness and heat resistance.
• Precision ground 118° point angle for accurate starting and reduced walking.
• DIN 338 jobber length for a balance of reach and rigidity.
• Cylindrical shank fits standard drill chucks.
• Right-hand cutting direction for standard drilling applications.
• Diameter tolerance h8 ensures consistent hole sizing.

Specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: High-speed steel (HSS)
• Coating: Titanium nitride (TiN)
• Diameter: 7.7 mm
• Overall length: 117 mm
• Flute length: 75 mm
• Point angle: 118°
• Shank type: Cylindrical
• Cutting direction: Right-hand
• Tolerance: h8
• Recommended materials: Steel, cast iron, non-ferrous metals, plastics

Tips

Use a center punch to mark the hole location before drilling to prevent the bit from wandering. Apply cutting fluid when drilling steel to prolong bit life and improve finish.