RUKO SPF-FCut-HSSCo 10.0mm HSS-Co 5% Twist Drill Bit DIN 338

This RUKO twist drill bit is ground from solid HSS-Co 5% (high-speed steel with 5% cobalt), a material that delivers very high heat and wear resistance. That makes it a dependable choice for demanding drilling in alloyed and unalloyed steel, cast iron, non-ferrous metals, and plastics, even where tensile strength reaches 1100 N/mm².

Highlights

• DIN 338 geometry with 130° point angle for self-centering starts and precise holes.
• Cylindrical shank with h8 tolerance fits standard three-jaw chucks securely.
• Right-hand cutting, coated surface for reduced friction and longer tool life.
• 10.0 mm cutting diameter, 133 mm total length, 87 mm working length.

In daily use

The solid cobalt-alloyed steel keeps the cutting edges sharp longer than conventional HSS bits, especially in tough materials. The 130° split point reduces walking on contact, so you can start accurately without a centre punch. The h8 shank tolerance ensures a firm, concentric grip in the chuck, minimising run-out and improving hole quality.

Full specifications

• Material: HSS-Co 5% (high-speed steel with 5% cobalt)
• Drill type: Twist drill bit
• Standard: DIN 338
• Cutting diameter: 10.0 mm
• Total length (L1): 133 mm
• Working length (L2): 87 mm
• Shank type: Cylindrical
• Shank diameter: 10.0 mm
• Point angle: 130°
• Surface finish: Coated
• Flute type: Right-hand cutting
• Tolerance: h8
• Manufacturing process: Ground from solid
• Application materials: Alloyed and unalloyed steel, cast iron, non-ferrous metals, plastics
• Max. tensile strength (workpiece): Up to 1100 N/mm²
• Heat resistance: Very high
• Wear resistance: Very high
• Self-centering: Yes
• Coolant through: No

Final note

For workshop professionals and serious DIYers who need a reliable 10 mm bit for hard steels, this RUKO drill bit offers the durability and accuracy that cobalt alloying provides.