RUKO STB-HSS punta a gradini 12-20 mm, HSS, 9 gradini, gambo 8 mm

Step drill bit for enlarging holes from 12 to 20 mm in 1 mm increments. Cuts clean, round holes in sheet metal, non-ferrous metals, plastics, stainless steel, and structural steel up to 4 mm thick.

Advantages

Self-centering split point eliminates walking. Single tool replaces nine individual drill bits. Bright HSS finish resists wear and maintains sharpness.

Suitable for

• Sheet metal
• Non-ferrous metals
• Plastics
• Stainless steel
• Structural steel

Key specifications

• Drilling diameter range: 12–20 mm
• Number of steps: 9
• Step increments: 1 mm
• Shank diameter: 8 mm
• Shank type: Cylindrical with 3-flat drive
• Overall length: 70 mm
• Cutting length: 48 mm
• Point angle: 118°
• Point type: Split point
• Surface finish: Bright (uncoated)
• Standard: DIN 1412 C
• Max material thickness: 4 mm

Recommendations

Use cutting fluid for optimal performance and tool life. Suitable for hand drills and stationary drilling machines.