RUKO KES-Bit-HSS-90°-10,4mm kartiojiirrin

Precision-ground 90° countersink bit with 10.4 mm cutting diameter and 5% cobalt HSS-E for long tool life in tough materials.

Overview

The RUKO KES-Bit-HSS-90°-10.4mm is a high-performance countersink bit engineered for clean, chatter-free countersinking, deburring, and chamfering. Its 3-flute design and 90° cutting angle produce smooth, accurate results in steel, stainless steel, cast iron, non-ferrous metals, and plastics.

What stands out

• HSS-E with 5% cobalt for superior heat resistance and edge retention
• Ground profile for precise cutting geometry and smooth finish
• DIN 335 C compliant for consistent quality and compatibility
• Uncoated bright finish reduces friction and prevents chip build-up

Technical details

• Cutting diameter: 10.4 mm
• Shank diameter: 6 mm
• Overall length: 45 mm
• Cutting angle: 90°
• Number of flutes: 3
• Material: HSS-E (cobalt 5%)
• Standard: DIN 335 C
• Shank type: cylindrical
• Direction of cut: right-hand
• Coating: uncoated (bright finish)

Our verdict

A reliable, professional-grade countersink bit that delivers clean results across a wide range of materials. The cobalt alloy and ground profile make it a durable choice for demanding workshops.