RUKO KES-DIN335-HSSCO-90°-8.3 mm Countersink Bit

With a 90° cutting angle and 8.3 mm cutting diameter, this RUKO countersink bit in HSS-Co steel delivers precise chamfering and deburring in tough materials.

Overview

The RUKO KES-DIN335-HSSCO-90°-8.3 mm is a high-performance countersink bit engineered to DIN 335 C standards. Its cobalt-alloyed high-speed steel (HSS-Co) construction provides superior heat resistance and durability, allowing it to maintain sharpness even under demanding conditions. The bit features a cylindrical shank with a 6 mm diameter and an overall length of 45 mm, making it compatible with standard drill chucks and suitable for a wide range of workshop tasks.

What stands out

• 90° cutting angle for standard countersunk screws
• HSS-Co steel with high cobalt content for enhanced heat resistance
• Three-flute design for smooth, chatter-free cutting
• Ground profile for precise, clean countersinks
• Bright surface finish for corrosion resistance and easy chip flow

Technical details

• Tool type: Countersink
• Standard: DIN 335 C
• Material: HSS-Co (High-Speed Steel with Cobalt)
• Cutting angle: 90°
• Cutting diameter (d1): 8.3 mm
• Shank type: Cylindrical
• Shank diameter (d2): 6 mm
• Overall length (L1): 45 mm
• Number of flutes: 3
• Direction of cut: Right-hand
• Surface finish: Bright
• Manufacturing process: Ground profile
• Recommended application: Deburring, chamfering, countersinking for screws
• Suitable materials: Steel, cast iron, non-ferrous metals, plastics
• Precision grade: Industrial

Our verdict

A reliable industrial-grade countersink bit that combines cobalt steel toughness with precise geometry, ideal for professionals who demand clean, accurate chamfers in a variety of materials.