RUKO SPB-DIN338-3/8-HSSCo Twist Drill Bit 3/8 inch (9.525 mm) DIN 338 HSS-Co

Machinists and metal fabricators working with high-alloy steels, stainless steel, or cast iron rely on the RUKO SPB-DIN338-3/8-HSSCo twist drill bit for precise, efficient drilling. Its 5% cobalt HSS-Co construction withstands high heat, while the 135° split point starts on contact without walking. Fully ground with a bright finish, this DIN 338 bit delivers clean holes in demanding materials.

Key specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co (5% cobalt)
• Diameter: 3/8 inch (9.525 mm)
• Overall length: 125 mm
• Working length: 81 mm
• Shank: Cylindrical, 9.525 mm
• Point angle: 135° split point
• Cutting direction: Right-hand
• Surface finish: Bright (uncoated)
• Tolerance: h8
• Packaging quantity: 1 piece

Why choose it

Cobalt alloyed high-speed steel provides superior heat and wear resistance compared to standard HSS, extending tool life in tough materials. The split point design reduces thrust and improves centering accuracy, making it suitable for use in drill presses and CNC machines.

Ideal use cases

• Drilling high-alloy steels and stainless steel
• Machining cast iron and bronze
• Working with non-ferrous metals and plastics

Good to know

Fully ground from solid for consistent geometry and performance. The h8 tolerance ensures a precise fit in standard chucks and collets.