RUKO KES-DIN335-HSS-TiN 90° Countersink Bit, 4.3 mm Cutting Diameter, 3 mm Shank, TiN Coated

The RUKO KES-DIN335-HSS-TiN-90°-Ø4,3mm is a precision countersink bit engineered for creating clean, accurate 90° chamfers and countersinks in a wide range of materials. Unlike standard countersinks, this bit features a titanium nitride (TiN) coating that significantly increases surface hardness and reduces friction, resulting in longer tool life and smoother finishes. Its fully ground profile ensures consistent cutting geometry and reliable performance in both manual and machine applications.

Highlights

• 90° cutting angle conforming to DIN 335 C standard
• TiN coating for enhanced wear resistance and reduced friction
• Fully ground from high-speed steel (HSS) for precision and durability
• Three-flute design for smooth, chatter-free countersinking
• Suitable for steel, cast iron, non-ferrous metals, plastics, and wood

In daily use

This countersink bit is ideal for deburring, chamfering, and countersinking holes to seat flat-head screws. The 4.3 mm cutting diameter matches common screw sizes, while the 3 mm cylindrical shank fits standard drill chucks. The right-hand cut direction and polished flutes promote efficient chip evacuation, making it a reliable choice for workshops and production environments.

Full specifications

• Tool type: Countersink
• Standard: DIN 335 C
• Material: High-speed steel (HSS)
• Coating: Titanium nitride (TiN)
• Cutting angle: 90°
• Major cutting diameter (d1): 4.3 mm
• Shank diameter (d2): 3 mm
• Overall length: 45 mm
• Number of flutes: 3
• Shank type: Cylindrical
• Direction of cut: Right-hand
• Manufacturing method: Fully ground profile
• Surface finish: Polished
• Color: Gold (TiN)
• Heat treatment: Hardened

Final note

A professional-grade countersink bit that delivers precise, repeatable results across diverse materials, backed by RUKO's engineering expertise.