RUKO SPB-DIN338-19/64-HSSCo HSS-Co Twist Drill Bit 19/64 inch (7.54 mm) DIN 338

Precision drilling in alloyed and unalloyed steel, stainless steel, cast iron, and non-ferrous metals demands a bit that stays sharp and true. The RUKO SPB-DIN338-19/64-HSSCo twist drill bit is built for machinists and metalworkers who need consistent, accurate holes in tough materials. With a 19/64 inch (7.54 mm) diameter, DIN 338 geometry, and a 5% cobalt high-speed steel construction, it delivers reliable performance in demanding workshop conditions.

Key specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co (high-speed steel with 5% cobalt)
• Diameter: 19/64 inch (7.54 mm)
• Shank type: Cylindrical, diameter 7.54 mm
• Point angle: 135°
• Point type: Split point (cross-ground)
• Flute type: Standard spiral flute
• Surface finish: Bright
• Cutting direction: Right-hand cutting
• Tolerance: h8
• Overall length: 117 mm
• Working length: 75 mm
• Recommended for materials up to 1100 N/mm² tensile strength

Why choose it

The 5% cobalt alloy withstands high temperatures, preserving hardness when drilling stainless steel or other tough alloys. The 135° split point starts on contact, reduces walking, and requires less thrust, while the bright finish promotes efficient chip evacuation. DIN 338 compliance ensures consistent dimensions and performance.

Ideal use cases

• Drilling stainless steel components in metal fabrication
• Creating precise holes in alloyed steel for machine building
• Maintenance and repair work on cast iron parts
• General metalworking in workshops and production lines

Good to know

Use appropriate cutting fluid for stainless steel and tough alloys to extend tool life. Always secure the workpiece and wear eye protection. The cylindrical shank fits standard drill chucks.