RUKO LOS-HSSCo-177mm HSS-Co5 Long Series Twist Drill Bit 6mm DIN 340

Drilling tough materials demands a bit that stays sharp and accurate. The RUKO LOS-HSSCo-177mm long series twist drill bit is built from high-speed steel with 5% cobalt (HSS-Co5), providing the heat resistance and hardness needed for stainless steel, alloyed and unalloyed steel, cast iron, non-ferrous metals, and plastics. Its 135° split point self-centers for precise starts without a pilot hole, while the fully ground flutes ensure efficient chip removal over the 114 mm working length.

Who is it for

Metalworkers, maintenance technicians, and serious DIYers who need a reliable, long-reach drill bit for deep holes in hard materials.

Main features

• HSS-Co5 cobalt steel for high wear resistance and heat tolerance
• 135° split point for self-centering and reduced walking
• Fully ground for smooth cutting and accurate hole sizing
• Long series (DIN 340) with 177 mm overall length and 114 mm flute length
• Right-hand cut, cylindrical shank, h8 tolerance
• Bright uncoated finish

Specifications

• Material: High-Speed Steel Cobalt (HSS-Co5)
• Diameter: 6.0 mm
• Overall Length: 177 mm
• Working Length (Flute Length): 114 mm
• Standard: DIN 340 (Long Series)
• Shank Type: Cylindrical
• Point Angle: 135°
• Point Type: Split Point (Self-centering)
• Direction of Cut: Right-hand cut
• Tolerance: h8
• Surface Finish: Bright / Uncoated
• Cobalt Content: 5%
• Manufacturing Process: Fully Ground

Tips

Use cutting fluid when drilling stainless steel or alloyed steels to extend tool life. For deep holes, withdraw the bit periodically to clear chips and prevent binding.