RUKO KES-DIN335-HSSCO-90°-6.3mm Countersink Bit

This RUKO countersink bit sets itself apart with a 90° angle and HSS-Co 5 cobalt steel construction, delivering high heat resistance and hardness for demanding deburring and chamfering tasks. Its ground profile ensures precise, clean results across steel, cast steel, non-ferrous metals, and light alloys.

Highlights

• DIN 335 C standard form for consistent countersinking
• 90° countersink angle for standard screw heads
• HSS-Co 5 cobalt alloy for extended tool life
• Three flutes for smooth cutting action
• Bright uncoated finish for general-purpose use

In daily use

With a 6.3 mm cutting diameter and 6 mm cylindrical shank, this bit fits standard drill chucks and collet chucks. Its right-hand cut and 45 mm overall length make it suitable for both manual and machine operations, providing accurate countersinks, chamfers, and deburring in a single pass.

Full specifications

• Tool Type: Countersink
• Standard: DIN 335 C
• Countersink Angle: 90°
• Material: HSS-Co 5
• Cutting Diameter (d1): 6.3 mm
• Shank Diameter (d2): 6 mm
• Overall Length (l1): 45 mm
• Number of Flutes: 3
• Surface Finish: Bright
• Cutting Direction: Right-hand
• Shank Type: Cylindrical
• Manufacturing Process: Ground Profile
• Packaging Unit: 1 piece
• Product Series: RUKO 102103

Final note

Precision-ground cobalt steel ensures reliable performance for professional countersinking applications.