DIN 335-C 90° HSS Countersink Bit 30 mm Head, 12 mm Shank, EL-CUT

Uneven edges, burrs, and poor surface finish often result from low-quality or incorrectly ground countersinks. This DIN 335-C 90° HSS Countersink Bit eliminates those issues, delivering precise, repeatable results in steel, cast iron, non-ferrous metals, and plastics. Its high-speed steel construction and precision ground profile ensure sharpness and durability, while the 90° cutting angle matches standard countersunk screw heads for flush seating.

Who is it for

Machinists, metalworkers, maintenance technicians, and serious DIY enthusiasts who demand professional-grade results. Ideal for deburring drilled holes, preparing surfaces for flat-head screws, or chamfering edges for safety and aesthetics, in both machine and hand use.

Main features

• Conforms to DIN 335-C standard for consistent geometry and performance.
• Made from high-speed steel (HSS) for excellent wear resistance and heat tolerance.
• 90° cutting angle suits standard countersunk screws.
• Three-flute design ensures smooth cutting and efficient chip removal.
• Bright uncoated finish reduces friction and prevents material buildup.
• Cylindrical shank fits standard drill chucks and collets.
• Right-hand cutting direction for conventional rotation.
• Precision ground profile for sharp, accurate cutting edges.

Specifications

• Tool Type: Countersink
• Standard: DIN 335-C
• Material: High-Speed Steel (HSS)
• Cutting Angle: 90°
• Head Diameter (D1): 30 mm
• Shank Diameter (D2): 12 mm
• Overall Length (L1): 71 mm
• Flute Length (L2): 20 mm
• Number of Flutes: 3
• Shank Type: Cylindrical
• Direction of Cut: Right-hand
• Surface Finish: Bright (Uncoated)
• Application: Countersinking, Chamfering, Deburring
• Suitable Materials: Steel, Cast Iron, Non-Ferrous Metals, Plastics
• Manufacturing Process: Ground Profile
• Recommended Use: Machine and Hand Use

Tips

For best results, use appropriate cutting fluid on hard materials and ensure the workpiece is securely clamped. The bright finish helps prevent chip adhesion, but regular cleaning extends tool life.