RUKO STB-HSS-SP-Gr.6 porraspora 6,0-32,0mm HSS

With a diameter range of 6.0 to 32.0 mm in 2.0 mm increments, this step drill bit handles 14 hole sizes in one tool, making it ideal for sheet metal, non-ferrous metals, plastics, and wood.

Overview

The RUKO STB-HSS-SP-Gr.6 is a high-speed steel (HSS) step drill bit with a cross-ground point for accurate starts and a single flute with chip breaker groove for efficient chip evacuation. Its cylindrical shank fits standard drill chucks.

What stands out

• 14 steps from 6.0 to 32.0 mm, each with 2.0 mm increments
• Form C geometry with chip breaker groove reduces clogging
• Cross-ground point (split point) for precise centering without a pilot hole
• Bright finish, uncoated, for clean cuts in soft materials
• Right-hand cutting direction, suitable for hand drills and drill presses

Technical details

• Drill Bit Type: Step Drill Bit
• Material: High-Speed Steel (HSS)
• Diameter Range: 6.0 - 32.0 mm
• Step Increments: 2.0 mm
• Number of Steps: 14
• Shank Type: Cylindrical
• Shank Diameter: 10 mm
• Total Length: 105 mm
• Step Length (Flute Length): 75 mm
• Point Angle: 118°
• Point Grinding: Cross-ground point (Split Point)
• Surface Finish: Bright (Uncoated)
• Cutting Direction: Right-hand cutting
• Recommended Materials: Sheet metal, non-ferrous metals, plastics, wood
• Max Material Hardness: Up to 900 N/mm²
• Standard: DIN 8037
• Size Group: Gr. 6
• Number of Flutes: 1 (Single Flute)
• Application: Drilling, deburring, reaming

Our verdict

A versatile step drill for professionals and DIYers who need clean, burr-free holes in thin materials without changing bits.