RUKO Step Drill Bit HSS TiAlN 4-39 mm, 12 Steps, 13 mm Shank

This step drill bit from RUKO stands out with its TiAlN coating, which significantly increases wear resistance and allows higher cutting speeds compared to uncoated HSS bits. It is engineered for drilling, deburring, and chamfering in sheet metal and other thin materials up to 4 mm thick.

Highlights

• TiAlN coating for extended tool life and heat resistance
• 12 steps from 4 mm to 39 mm in 3 mm increments
• Straight flute design for efficient chip evacuation
• 118° point angle for precise centering
• Cylindrical shank with 13 mm diameter fits standard drill chucks

In daily use

Ideal for electricians, plumbers, and metalworkers, this step drill bit quickly enlarges existing holes or creates new ones in steel, stainless steel, non-ferrous metals, plastics, and sheet metal. The TiAlN coating reduces friction, allowing smoother cutting and less heat buildup. Use with cutting fluid for best results.

Full specifications

• Material: High-Speed Steel (HSS)
• Coating: Titanium Aluminum Nitride (TiAlN)
• Drill diameter range: 4 - 39 mm
• Number of steps: 12
• Step increments: 3 mm
• Drill diameters: 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 39 mm
• Shank type: Cylindrical
• Shank diameter: 13 mm
• Total length: 105 mm
• Flute type: Straight flute
• Point angle: 118°
• Recommended max material thickness: 4 mm
• Suitable materials: Steel, stainless steel, non-ferrous metals, plastics, sheet metal
• Application: Drilling, deburring, chamfering
• Coolant use: Recommended
• Manufacturing standard: DIN 1412 C
• Cutting direction: Right-hand cutting

Final note

A versatile step drill bit that combines durability and precision for professional results in thin materials.