RUKO STB-HSS-TiN Step Drill Bit 1/8 inch–7/8 inch (3.2–22.2 mm), 25 Steps, TiN-Coated HSS

This RUKO step drill bit combines drilling, deburring, reaming, and countersinking in a single tool, eliminating the need for multiple bit changes. Its titanium nitride coating reduces friction and heat, extending tool life when working with sheet metal, non-ferrous metals, plastics, and thin steel.

Highlights

• 25-step design covers diameters from 1/8 inch (3.2 mm) to 7/8 inch (22.2 mm)
• TiN coating for improved wear resistance and smoother cutting
• 3-flat shank prevents slipping in the drill chuck
• Spiral flute ensures efficient chip evacuation
• 118° point angle for precise starting

In daily use

The step drill bit excels in thin materials up to 4 mm thick, including stainless steel up to 1.5 mm. Its right-hand cutting direction and 10 mm shank diameter make it compatible with standard drill chucks. For best results, use cutting oil or coolant to reduce heat and prolong tool life.

Full specifications

• Product type: Step drill bit
• Material: High-speed steel (HSS)
• Coating: Titanium nitride (TiN)
• Drilling diameter range: 1/8" – 7/8" (3.2 – 22.2 mm)
• Number of steps: 25
• Shank type: 3-flat shank
• Shank diameter: 10 mm
• Total length: 80 mm
• Flute type: Spiral flute
• Point angle: 118°
• Cutting direction: Right-hand cut
• Recommended material thickness: Up to 4 mm
• Suitable materials: Sheet metal, non-ferrous metals, plastics, thin steel, stainless steel (up to 1.5 mm)
• Standard compliance: DIN 1412 C
• Surface finish: Gold
• Packaging quantity: 1

Final note

RUKO's step drill bit delivers clean, burr-free holes in one pass, making it a reliable choice for electricians, plumbers, and metal fabricators.