RUKO KES-DIN335-HSS-TiAlN-90°-Ø30.0mm Countersink Bit

For machinists and metalworkers who need clean, precise countersinks in tough materials, this RUKO countersink bit delivers a 90° cone angle and a 30.0 mm cutting diameter. The TiAlN coating on HSS keeps the cutting edges hard and heat-resistant, so it holds up in steel, stainless steel, cast iron, non-ferrous metals, and plastics.

Key specifications

• Type: Countersink bit
• Standard: DIN 335 C
• Cutting diameter: 30.0 mm
• Countersink angle: 90°
• Material: High-speed steel (HSS)
• Coating: Titanium aluminum nitride (TiAlN)
• Shank type: Cylindrical
• Shank diameter: 12 mm
• Overall length: 71 mm
• Number of flutes: 3
• Cutting direction: Right-hand
• Manufacturing method: Ground profile
• Max. workpiece hardness: Up to 1200 N/mm²

Why choose it

The TiAlN coating reduces friction and heat buildup, extending tool life and allowing higher cutting speeds. The three-flute design produces smooth, chatter-free countersinks, and the ground profile ensures accurate geometry for repeatable results.

Ideal use cases

• Deburring drilled holes in steel and stainless steel components
• Chamfering edges before threading or assembly
• Countersinking for flat-head screws in machine building and metal fabrication

Good to know

This bit is part of the RUKO KES series and is designed for use in stationary machines or hand drills with a suitable chuck. It is not intended for wood or very soft materials where a different geometry would be more efficient.