RUKO punta a gradini HSS TiN 4-12 mm, 9 gradini, gambo cilindrico

This step drill bit combines drilling, deburring, and reaming in one operation, eliminating the need for multiple tools when working with sheet metal, non-ferrous metals, plastics, and thin steel up to 4 mm thick. The titanium nitride coating reduces friction and heat, extending tool life and enabling faster drilling compared to uncoated HSS bits.

Highlights

• Drilling range 4–12 mm in 1 mm increments, 9 steps
• Self-centering tip for accurate hole positioning
• Spiral flute design for efficient chip removal
• TiN coating for wear resistance and reduced friction

In daily use

The cylindrical 6 mm shank fits standard drill chucks, and the step design allows you to create multiple hole sizes with a single bit. Suitable for thin materials where a conventional twist drill would grab or wander. Use coolant for extended tool life when drilling harder metals.

Full specifications

• Drill bit type: Step drill bit
• Material: High-speed steel (HSS)
• Coating: Titanium nitride (TiN)
• Drilling diameter range: 4–12 mm
• Step increments: 1 mm
• Number of steps: 9
• Shank type: Cylindrical
• Shank diameter: 6 mm
• Maximum material thickness: 4 mm
• Flute design: Spiral flute
• Tip design: Self-centering
• Standard: DIN 1412 C
• Colour: Gold

Final note

A versatile step drill for clean, accurate holes in thin materials, with the durability of TiN coating.