RUKO LOS-HSSCo-35mm HSS-Co5 Twist Drill Bit, 35 mm Diameter, Reduced Shank 13 mm

Drill 35 mm holes in high-alloy steels, stainless steel, cast iron, bronze, and hardened steel with this HSS-Co5 twist drill bit from RUKO. The 5% cobalt alloy and 135° split point deliver high heat resistance and self-centering starts.

Overview

The RUKO LOS-HSSCo-35mm is a professional-grade twist drill bit ground from solid HSS-Co5 (high-speed steel with 5% cobalt). It features a 35 mm cutting diameter, a reduced 13 mm shank for compatibility with standard drill chucks, and a bright polished finish. The 135° split point eliminates walking and reduces thrust pressure, while the right-hand cutting direction suits conventional drilling machines.

What stands out

• 5% cobalt HSS for excellent wear resistance and very high heat resistance
• 135° split point for precise, self-centering starts without a centre punch
• Reduced 13 mm shank fits 1/2" chucks despite the large 35 mm diameter
• Ground from solid for consistent geometry and longer tool life
• Bright polished finish reduces chip adhesion and improves chip evacuation

Technical details

• Drill bit type: Twist drill bit
• Material: HSS-Co5 (5% cobalt high-speed steel)
• Drill diameter: 35 mm
• Shank type: Reduced shank, 13 mm diameter
• Overall length: 200 mm
• Working length (flute length): 100 mm
• Point angle: 135°
• Point grind: Split point
• Cutting direction: Right-hand cut
• Surface finish: Bright / polished
• Coating: Uncoated
• Number of flutes: 2
• Manufacturing process: Ground from solid

Our verdict

A heavy-duty cobalt twist drill for demanding materials, the RUKO LOS-HSSCo-35mm combines a large cutting diameter with a practical reduced shank, making it a reliable choice for industrial drilling tasks.