RUKO HSS-Co Reduced Shank Twist Drill Bit 17.5 mm

For machinists and metalworking professionals drilling large-diameter holes in tough alloys, the RUKO HSS-Co Reduced Shank Twist Drill Bit 17.5 mm delivers the rigidity and heat resistance needed for industrial applications. Its cobalt-alloyed high-speed steel construction withstands temperatures up to 600°C, making it suitable for high-alloy steels, stainless steels, heat-resistant steels, titanium alloys, cast iron, bronze, and hard plastics.

Key specifications

• Drilling diameter: 17.5 mm
• Material: HSS-Co (high-speed steel with cobalt)
• Shank type: Reduced shank, 12.7 mm (1/2 inch)
• Standard: DIN 338
• Point angle: 135°
• Point type: Split point (self-centering)
• Cutting direction: Right-hand cutting
• Surface finish: Bright
• Overall length: 178 mm
• Flute length: 120 mm
• Tolerance: h8

Why choose it

The split point design eliminates walking and reduces thrust pressure, while the cobalt alloy maintains hardness at high temperatures, extending tool life in demanding materials. The reduced shank allows use in standard 1/2-inch chucks, providing versatility across drill presses and handheld drills.

Ideal use cases

• Drilling large holes in stainless steel and high-alloy steels
• Machining heat-resistant alloys and titanium
• Industrial maintenance and fabrication
• Precision drilling in cast iron and bronze

Good to know

Manufactured by RUKO GmbH, a German precision tool maker. The bit is designed for right-hand rotation and is suitable for use with cutting fluid to maximize performance.