RUKO SPB-DIN338-HSS-TiN σπειροειδές τρυπάνι 7,8 mm

The RUKO SPB-DIN338-HSS-TiN Ø7.8 mm twist drill bit is a precision-ground tool with a titanium nitride coating that reduces friction and extends service life. Unlike uncoated HSS bits, the TiN layer provides a hard, gold-coloured surface that withstands temperatures up to 600°C, making it suitable for repeated drilling in steel, cast iron, non-ferrous metals and plastics.

Highlights

• Ground from solid HSS to DIN 338 with h8 shank tolerance for accurate hole sizing
• Titanium nitride (TiN) coating with approx. 2300 HV hardness for reduced wear
• 118° point angle and type N helix for general-purpose drilling in a wide range of materials
• Cylindrical shank fits standard three-jaw drill chucks

In daily use

The 117 mm overall length and 75 mm flute length provide good chip evacuation and reach for most workshop tasks. The right-hand cutting direction matches the rotation of conventional drill presses and hand drills. The 7.8 mm diameter is ideal for preparing holes for M8 threads or for clearance holes in assembly work.

Full specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: High-speed steel (HSS)
• Coating: Titanium nitride (TiN)
• Diameter: 7.8 mm
• Shank type: Cylindrical
• Shank diameter: 7.8 mm
• Point angle: 118°
• Helix angle: Normal (type N)
• Cutting direction: Right-hand cutting
• Total length: 117 mm
• Flute length: 75 mm
• Manufacturing process: Ground from solid
• Tolerance: h8
• Coating colour: Gold
• Heat resistance (coating): Up to 600°C
• Surface hardness (coating): Approx. 2300 HV
• Recommended materials: Steel, cast iron, non-ferrous metals, plastics
• Packaging quantity: 1 piece

Final note

A reliable, general-purpose twist drill bit with a wear-resistant TiN coating for everyday drilling in metal and plastic.