RUKO STB-HSS porraspora 3/16"-1/2" (4,8-12,7 mm) HSS

Step drill bit for drilling and deburring holes in thin materials up to 4 mm thickness. The HSS construction with bright finish delivers clean, precise holes in sheet metal, non-ferrous metals, plastics, and stainless steel.

Advantages

Self-centering tip eliminates the need for pilot drilling and prevents walking. Straight flutes ensure efficient chip removal. Each step deburrs the hole as it drills, saving time and improving finish quality.

Suitable for

• Sheet metal
• Non-ferrous metals
• Plastics
• Stainless steel up to 4 mm thickness

Key specifications

• Drill bit type: Step drill bit
• Material: High-speed steel (HSS)
• Drilling diameter range: 3/16" - 1/2" (4.8 - 12.7 mm)
• Number of steps: 6
• Step increments: 1/16" (1.59 mm)
• Shank type: Cylindrical
• Shank diameter: 6 mm
• Overall length: 67 mm
• Working length: 40 mm
• Point angle: 118°
• Flute type: Straight flute
• Surface finish: Bright
• Self-centering tip: Yes
• Deburring function: Yes
• Maximum material thickness: 4 mm
• Standard: DIN 1412 C

Recommendations

Use with a drill press or hand drill at moderate speed. Apply cutting fluid when drilling stainless steel to extend tool life. Ideal for electricians, plumbers, and sheet metal workers.