RUKO STB-HSS-TiN porraspora 3/8-1/2 tuumaa

Step drill bit for precise, burr-free holes in sheet metal, non-ferrous metals, plastics, and thin steel. The titanium nitride coating reduces friction and increases hardness, while the cross-ground point self-centers for accurate starting.

Advantages

TiN coating extends tool life and improves chip flow. Spiral flute design ensures efficient material removal. Deburring edge produces clean hole edges without secondary operations.

Suitable for

• Sheet metal
• Non-ferrous metals
• Plastics
• Thin steel

Key specifications

• Drilling diameter range: 3/8 - 1/2 inch (9.525 - 12.7 mm)
• Number of steps: 5
• Step increments: 1/32 inch (0.79 mm)
• Individual step length: 4 mm
• Shank type: cylindrical, diameter 8 mm
• Total length: 70 mm
• Point angle: 118°
• Tip geometry: cross-ground point (DIN 1412 C)

Recommendations

Use coolant for optimal performance and tool life. Suitable for use in hand drills and stationary machines.