RUKO KES-Bit-HSS-90°-6.3mm Countersink Bit

The RUKO KES-Bit-HSS-90°-6.3mm is a high-speed steel countersink bit engineered for precise 90° countersinking and deburring in wood, plastics, non-ferrous metals, and mild steel. Its 6.3 mm cutting diameter and three precision-ground flutes deliver clean, chatter-free results, while the 1/4 inch hex shank ensures secure chucking in cordless drills and impact drivers.

Advantages

Precision-ground cutting edges provide smooth, accurate countersinks. The HSS construction with hardened heat treatment offers long service life. The hex shank prevents slipping in the chuck, ensuring consistent depth control.

Suitable for

• Countersinking screw holes in wood and plastics
• Deburring drilled holes in non-ferrous metals and mild steel
• Use with cordless drills, drills, and impact drivers

Key specifications

• Product type: Countersink bit
• Material: High-speed steel (HSS)
• Countersink angle: 90°
• Cutting diameter: 6.3 mm
• Shank type: Hex shank, 1/4 inch (6.35 mm)
• Number of flutes: 3
• Total length: 45 mm
• Standard: DIN 335 C
• Surface finish: Bright (uncoated)
• Cutting direction: Right-hand cut

Recommendations

For best results, use a drill press or guide to maintain perpendicular alignment. Apply moderate pressure and speed appropriate for the workpiece material. The bit is suitable for occasional use in mild steel; for production work in harder metals, consider cobalt or carbide countersinks.