RUKO SPB-DIN338-1/4-HSSCo HSS-Co Jobber Drill Bit, 1/4 inch (6.35 mm), DIN 338, Split Point, 135°

Drilling into tough materials like stainless steel or high-alloy steels quickly dulls standard drill bits, leading to poor hole quality and frequent bit replacements. The RUKO SPB-DIN338-1/4-HSSCo solves this with a cobalt-alloyed high-speed steel body that withstands high temperatures and maintains hardness, ensuring consistent performance in demanding applications.

Who is it for

This drill bit is for metalworkers, machinists, and maintenance professionals who regularly drill high-strength steels, stainless steel, cast iron, and non-ferrous metals. It suits workshops and industrial environments where precision and tool life are critical.

Main features

• HSS-Co (cobalt alloyed high-speed steel) for high heat resistance and durability
• DIN 338 standard dimensions with 1/4 inch (6.35 mm) diameter
• 135° split point for self-centering and reduced walking
• Fully ground flutes for excellent chip evacuation
• Suitable for materials up to 1100 N/mm² tensile strength

Specifications

• Material: HSS-Co
• Standard: DIN 338
• Drill bit type: Jobber drill
• Diameter: 1/4 inch (6.35 mm)
• Shank type: Cylindrical
• Point angle: 135°
• Point type: Split point
• Cutting direction: Right-hand
• Surface finish: Bright
• Overall length: 101 mm
• Flute length: 63 mm
• Tolerance: h8
• Manufacturing process: Fully ground

Tips

Use cutting fluid or coolant when drilling hard materials to extend tool life and improve hole quality. Secure the workpiece firmly and apply steady pressure to avoid work hardening, especially in stainless steel.