Broca escalonada RUKO HSS TiAlN ranhura helicoidal 6,5-32,5mm 14 degraus

Drilling clean, burr-free holes in sheet metal and thin materials can be a challenge with standard twist drills, which often wander or leave rough edges. This RUKO step drill bit solves that problem by combining a self-centering point with a spiral flute design, allowing you to create precise, progressively larger holes without changing bits.

Who is it for

This step drill is ideal for electricians, plumbers, HVAC technicians, and metal fabricators who frequently drill holes in sheet metal, non-ferrous metals, plastics, and stainless steel. It works with both drill presses and hand drills, making it versatile for workshop or on-site use.

Main features

• High-speed steel (HSS) body with titanium aluminum nitride (TiAlN) coating for extended tool life and heat resistance.
• 14 steps in 2 mm increments, covering diameters from 6.5 mm to 32.5 mm.
• Spiral flute design for efficient chip evacuation and smoother cutting.
• Self-centering point eliminates the need for a pilot hole and prevents walking.
• Right-hand cutting direction for standard drilling.
• Maximum material thickness: 4 mm per step.

Specifications

• Drill type: Step drill bit
• Material: High-speed steel (HSS)
• Coating: Titanium aluminum nitride (TiAlN)
• Drilling diameter range: 6.5 - 32.5 mm
• Number of steps: 14
• Step increments: 2 mm
• Shank diameter: 10 mm
• Shank type: Cylindrical
• Total length: 100 mm
• Maximum material thickness: 4 mm
• Point angle: 118°
• Flute type: Spiral flute
• Cutting direction: Right-hand cutting
• Recommended materials: Sheet metal, non-ferrous metals, plastics, stainless steel
• Tool compatibility: Drill presses, hand drills
• Special features: Self-centering point, burr-free drilling
• Grade: 15

Tips

Use cutting fluid when drilling stainless steel to prolong bit life. For best results, secure the workpiece and apply steady, even pressure. The TiAlN coating allows for higher cutting speeds compared to uncoated HSS bits.