RUKO SPB-HSS porraspora A1-varrella, 14-30 mm, 9 porrasta, HSS

Drill, deburr and ream holes from 14 mm to 30 mm in sheet metal, non-ferrous metals and plastics with this 9-step HSS step drill bit. The A1 three-flat shank prevents slipping in a 10 mm chuck, while the 118° point and spiral flute deliver clean, fast cuts in materials up to 4 mm thick.

Overview

The RUKO SPB-HSS step drill bit combines multiple diameters in one tool, eliminating the need for tool changes. Made from bright high-speed steel, it is suited for corded and cordless drills. The 2 mm step increments provide precise hole sizing, and the 70 mm working length reaches into tight spaces.

What stands out

• 9 steps cover 14 mm to 30 mm in 2 mm increments
• A1 shank with three flats for secure chuck grip
• Spiral flute for efficient chip evacuation
• Bright finish for corrosion resistance and visibility
• Drills, deburrs and reams in one operation

Technical details

• Material: High-Speed Steel (HSS)
• Drilling range: 14–30 mm
• Number of steps: 9
• Step increment: 2 mm
• Max material thickness: 4 mm
• Point angle: 118°
• Flute type: Spiral
• Surface finish: Bright (uncoated)
• Total length: 100 mm
• Working length: 70 mm
• Shank diameter: 10 mm
• Shank type: A1 (three-flat)
• Standard: DIN 1412 C

Our verdict

A versatile step drill for professionals who need accurate, burr-free holes in thin materials without switching bits.