RUKO SPB-DIN338-17/64-HSSCo Twist Drill Bit, 6.75 mm, HSS-Co 5%

Precision drilling in alloyed steel, stainless steel, cast iron and non-ferrous metals demands a bit that stays sharp and resists heat. The RUKO SPB-DIN338-17/64-HSSCo twist drill bit is ground from solid HSS-Co with 5% cobalt, making it a reliable choice for machine shops and maintenance crews working with materials up to 1100 N/mm² tensile strength.

Key specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co (high-speed steel with cobalt)
• Cobalt content: 5%
• Diameter: 17/64 inch (6.75 mm)
• Shank type: Cylindrical
• Point angle: 135°
• Flute type: Standard spiral
• Surface finish: Bright / ground
• Overall length: 109 mm
• Working length: 69 mm
• Tolerance: h8
• Cutting direction: Right-hand cutting
• Manufacturing process: Ground from solid

Why choose it

The 5% cobalt alloy increases heat resistance and wear life compared to standard HSS, allowing higher cutting speeds and longer intervals between regrinds. The 135° split point reduces walking and requires less centre punching, while the bright ground finish promotes efficient chip evacuation.

Ideal use cases

• Drilling alloyed and unalloyed steel up to 1100 N/mm²
• Stainless steel and cast iron
• Non-ferrous metals
• Machine shops, metalworking, and maintenance applications

Good to know

Supplied as a single piece. For best results, use appropriate cutting fluid and controlled feed pressure.