RUKO KES-UC-DIN335-HSSCo-RT-90°-Ø23,0mm-3S Countersink Bit, HSS-Co, 90°, 23 mm, 3 Flutes

With a 23 mm cutting diameter and 90° cutting angle, this HSS-Co countersink delivers clean, chatter-free chamfers in steel, stainless steel, cast iron, non-ferrous metals, and plastics. The 3-flute geometry and ground profile ensure smooth cutting and long tool life, while the 10 mm cylindrical shank fits standard drill chucks and collets.

Overview

The RUKO GMBH KES-UC-DIN335-HSSCo-RT-90°-Ø23,0mm-3S is a high-performance countersink bit engineered to DIN 335 C standards. It is manufactured from HSS-Co (high-speed steel with cobalt), which provides enhanced heat resistance and wear resistance compared to standard HSS. The right-hand cutting direction and 3-flute design allow efficient chip evacuation and reduced cutting forces.

What stands out

• 23 mm cutting diameter for large countersinks and deburring
• 90° cutting angle suits standard countersunk screws
• 3 flutes for smooth, vibration-free operation
• HSS-Co material for extended tool life in tough materials
• Cylindrical shank (10 mm) for secure clamping

Technical details

• Tool Type: Countersink
• Standard: DIN 335 C
• Material: HSS-Co
• Cutting Angle: 90°
• Cutting Diameter: 23.0 mm
• Shank Type: Cylindrical
• Shank Diameter: 10 mm
• Overall Length: 67 mm
• Number of Flutes: 3
• Coating: Uncoated
• Direction of Cut: Right-hand
• Application: Deburring, Chamfering, Countersinking
• Suitable Materials: Steel, Stainless Steel, Cast Iron, Non-ferrous metals, Plastics
• Manufacturing Process: Ground Profile
• Product Series: Karnasch 30000 Series
• Packaging Quantity: 1 piece

Our verdict

A robust and precise countersink for professional use, offering excellent performance in a wide range of materials. The cobalt steel construction and 3-flute design make it a reliable choice for demanding workshop tasks.