RUKO KES-DIN335-HSSCo-90°-Ø16.5mm Countersink

Machinists and metalworkers use this RUKO countersink to create precise 90° chamfers and deburr holes in steel, stainless steel, cast iron, and non-ferrous metals. The HSS-Co construction with cobalt alloying provides high heat resistance for demanding drilling applications.

Key specifications

• Type: Countersink
• Standard: DIN 335 C
• Material: HSS-Co (High-Speed Steel with Cobalt)
• Cutting angle: 90°
• Cutting diameter: 16.5 mm
• Shank diameter: 10 mm
• Overall length: 60 mm
• Number of flutes: 3
• Direction of cut: Right-hand
• Surface treatment: Bright / Uncoated
• Manufacturing method: Precision ground
• Shank tolerance: h8

Why choose it

The cobalt-alloyed high-speed steel maintains hardness at elevated temperatures, extending tool life in tough materials. Three flutes ensure smooth cutting action and excellent chip evacuation. Precision grinding delivers consistent geometry for accurate countersinks.

Ideal use cases

• Deburring and chamfering drilled holes
• Countersinking for flat-head screws
• Preparing workpieces for threading
• Machining steel, stainless steel, cast iron, non-ferrous metals, and plastics

Good to know

This countersink features a cylindrical shank with h8 tolerance for secure clamping in standard drill chucks. The bright finish provides a clean surface and corrosion resistance during storage. Suitable for use in hand drills and stationary machines.