RUKO SPB-DIN338-4.7mm HSSCo Twist Drill Bit

Precision-ground HSS-Co twist drill bit with 5% cobalt, engineered for stainless and high-alloy steels. The 135° split point and DIN 338 geometry deliver immediate centering and clean holes in demanding materials.

Overview

This industrial-grade drill bit from RUKO is manufactured to DIN 338 standards, featuring a cylindrical shank and a bright, uncoated finish. The high-speed steel with 5% cobalt (HSS-Co) ensures superior heat resistance and durability, making it ideal for professional use in stainless steel, high-alloy steels, cast iron, acid-resistant steels, and heat-resistant steels.

What stands out

• 5% cobalt alloy for enhanced hardness and wear resistance
• 135° split point eliminates walking and reduces thrust pressure
• Fully ground flutes for optimal chip evacuation
• Right-hand cut with standard spiral flute (Type N) for versatile drilling
• h8 tolerance for consistent hole sizing

Technical details

• Diameter: 4.7 mm
• Overall length: 80 mm
• Flute length: 47 mm
• Shank type: cylindrical (straight)
• Point angle: 135°
• Point grind: split point (cross-ground)
• Surface finish: bright (uncoated)
• Standard: DIN 338
• Material: HSS-Co (high-speed steel with cobalt)
• Cobalt content: 5%
• Direction of cut: right-hand
• Flute type: standard spiral (Type N)
• Manufacturing process: fully ground
• Tolerance: h8
• Application: stainless steel, high-alloy steels, cast iron, acid-resistant steels, heat-resistant steels

Our verdict

A reliable, high-performance drill bit for professionals who demand precision and longevity when working with tough metals.