RUKO DIN 340 Extra-Long HSS-G Twist Drill Bit 8.0 mm

Deep-hole drilling in tough materials demands a drill bit that stays accurate and clears chips efficiently. The RUKO SPB-DIN340-8,0mm-SB is an extra-long twist drill bit engineered to reach deep cavities without sacrificing precision. Its 8.0 mm diameter and 160 mm total length make it the go-to choice for steel, cast iron, non-ferrous metals, plastics, and wood.

Who is it for

Machinists, metalworkers, and serious DIYers who need reliable deep-hole drilling in a single, high-quality bit. If you regularly drill through thick stock or need extended reach, this bit eliminates the need for stepping or multiple bits.

Main features

• Extra-long DIN 340 design: 160 mm total length with 105 mm flute length for deep bores.
• HSS-G ground from solid: high-speed steel, precision ground for sharpness and durability.
• 8.0 mm diameter with cylindrical shank and 118° point angle for accurate starts.
• Bright finish reduces friction and improves chip flow.
• Right-hand cutting, h8 tolerance for consistent hole sizing.
• Self-service blister pack (SB) for retail display and protection.

Specifications

• Drill bit type: Twist drill bit
• Standard: DIN 340 (extra-long)
• Material: HSS-G (high-speed steel, ground)
• Diameter: 8.0 mm
• Total length: 160 mm
• Working length (flute length): 105 mm
• Shank type: Cylindrical
• Point angle: 118°
• Surface finish: Bright (ground)
• Cutting direction: Right-hand cutting
• Tolerance: h8
• Number of pieces: 1

Tips

Use a centre punch to mark the hole location for precise starting. Apply cutting fluid when drilling steel to extend bit life and improve finish. For deep holes, withdraw the bit periodically to clear chips and prevent binding.