RUKO HGB-Set21tlg-HSSCo-1-RO 21-Piece HSS-Co Roll-Forged Twist Drill Bit Set DIN 338

21-piece HSS-Co twist drill bit set with 5% cobalt, roll-forged to DIN 338, covering diameters 1.0–10.0 mm in 0.5 mm increments. Ideal for alloyed and unalloyed steel up to 1000 N/mm², cast iron, non-ferrous metals, and plastics.

Overview

The RUKO HGB-Set21tlg-HSSCo-1-RO is a professional drill bit set engineered for demanding metalworking tasks. Each bit is manufactured from high-speed steel with 5% cobalt (HSS-Co) and roll-forged for superior strength and durability. The set includes 21 bits in a robust metal cassette, covering diameters from 1.0 mm to 10.0 mm in 0.5 mm steps, all conforming to DIN 338.

What stands out

• 5% cobalt alloy for high heat resistance and extended tool life
• Roll-forged construction enhances toughness and precision
• 118° point angle with normal helix for efficient chip removal
• Bright finish reduces friction and improves cutting performance
• Suitable for a wide range of materials including steel, cast iron, non-ferrous metals, and plastics

Technical details

• Material: HSS-Co (5% cobalt)
• Manufacturing process: Roll-forged
• Standard: DIN 338
• Point angle: 118°
• Shank type: Cylindrical
• Cutting direction: Right-hand
• Tolerance: h8
• Diameter range: 1.0–10.0 mm (0.5 mm increments)
• Max tensile strength: 1000 N/mm²
• Packaging: Robust metal cassette

Our verdict

A comprehensive and precise drill bit set for professionals who demand reliability and performance in metal drilling applications.