RUKO KES-Bit-HSS 90° Countersink Bit 12.4mm, DIN 335 C, 3-Flat Shank

The RUKO KES-Bit-HSS 90° countersink bit stands out with its 12.4 mm cutting diameter and 90° angle, ground from solid HSS-E for clean deburring and chamfering in tough materials. Unlike standard bits, its cylindrical shank features a 3-flat drive to prevent slipping in the chuck.

Highlights

• 90° cutting angle for standard countersinks
• HSS-E (cobalt alloyed) for high wear resistance
• DIN 335 C geometry with 3 flutes for smooth cutting
• 3-flat shank ensures secure grip in drill chucks
• Suitable for steel, stainless steel, cast iron, non-ferrous metals, and plastics

In daily use

This countersink bit delivers precise, chatter-free countersinks in a single pass. The 3-flute design reduces vibration, while the solid HSS-E construction withstands high cutting temperatures. Its 10 mm shank fits standard drill chucks and collets, making it a reliable choice for workshop and production environments.

Full specifications

• Tool type: Countersink bit
• Cutting diameter: 12.4 mm
• Cutting angle: 90°
• Shank diameter: 10 mm
• Shank type: Cylindrical with 3-flat drive
• Overall length: 56 mm
• Flute length: 18 mm
• Number of flutes: 3
• Material: HSS-E (High-Speed Steel with Cobalt)
• Coating: Uncoated (bright finish)
• Standard: DIN 335 C
• Manufacturing process: Ground from solid
• Tolerance: h8
• Point geometry: Conical
• Coolant supply: External
• Application materials: Steel, stainless steel, cast iron, non-ferrous metals, plastics
• Recommended use: Deburring, chamfering, countersinking
• Tool holder compatibility: Drill chucks, collet chucks

Final note

Precision-ground and built for demanding tasks, the RUKO KES-Bit-HSS 90° is a dependable choice for clean, accurate countersinks in a wide range of materials.