RUKO STB-HSS-TiN-SP-Gr.14-5.3-30.5mm Step Drill Bit, HSS-TiN, 14 Steps, 5.3-30.5 mm

The RUKO STB-HSS-TiN-SP-Gr.14-5.3-30.5mm step drill bit stands out with its 14-step design that covers a wide diameter range from 5.3 to 30.5 mm, eliminating the need for multiple drill bits when creating precise, burr-free holes in sheet metal and other thin materials. The titanium nitride coating provides a hard, wear-resistant surface that extends tool life and allows higher cutting speeds compared to uncoated HSS bits.

Highlights

• 14-step design drills holes from 5.3 mm to 30.5 mm in one operation
• High-speed steel (HSS) body with titanium nitride (TiN) coating for enhanced durability
• 3-flat shank ensures secure grip in drill chucks and prevents slipping
• Ground cutting edges deliver clean, accurate holes in sheet metal, non-ferrous metals, plastics, and stainless steel up to 1000 N/mm²
• Right-hand cutting direction with a standard 118° point angle for efficient material removal

In daily use

This step drill is ideal for electricians, plumbers, and metal fabricators who frequently drill holes in thin materials. The spiral flute design aids chip evacuation, while the maximum material thickness of 4 mm covers common sheet metal gauges. The 10 mm shank diameter fits standard drill chucks, and the 100 mm overall length provides good reach without being unwieldy.

Full specifications

• Drill Bit Type: Step drill bit
• Material: High-speed steel (HSS)
• Coating: Titanium nitride (TiN)
• Drilling Diameter Range: 5.3 - 30.5 mm
• Number of Steps: 14
• Shank Type: 3-flat shank
• Shank Diameter: 10 mm
• Overall Length: 100 mm
• Maximum Material Thickness: 4 mm
• Point Angle: 118°
• Cutting Direction: Right-hand cutting
• Application Materials: Sheet metal, non-ferrous metals, plastics, stainless steel (up to 1000 N/mm²)
• Standard: DIN 8037
• Cutting Edge: Ground
• Flute Type: Spiral flute
• Coolant Through: No

Final note

For professionals who demand precision and longevity in step drilling, the RUKO STB-HSS-TiN-SP-Gr.14-5.3-30.5mm offers a reliable solution with its TiN coating and robust design.