RUKO BSB-HSS Step Drill Bit 5-22.5mm, 10 Steps, HSS, DIN 8037

Drilling clean, burr-free holes in sheet metal and thin materials often requires multiple tools and extra deburring steps. The RUKO BSB-HSS step drill bit solves this by combining drilling and deburring in one operation, producing precise holes from 5 to 22.5 mm in diameter.

Who is it for

This step drill is for metalworkers, electricians, and installers who regularly work with sheet metal, non-ferrous metals, and plastics up to 4 mm thick. It suits professionals and serious DIYers needing a single tool for multiple hole sizes without changing bits.

Main features

• High-speed steel (HSS) construction for durability and heat resistance.
• 10 stepped diameters: 5, 7, 9, 11, 13, 15, 17, 19, 21, and 22.5 mm.
• Self-centering split point for accurate starting without a pilot hole.
• Automatic deburring of the hole edge as you drill.
• Cylindrical shank with 10 mm diameter fits standard drill chucks.
• Bright finish for corrosion resistance and smooth chip flow.
• Right-hand cutting direction for standard drilling.
• Complies with DIN 8037 for step drills.

Specifications

• Material: High-Speed Steel (HSS)
• Drill type: Step drill bit
• Diameter range: 5 - 22.5 mm
• Number of steps: 10
• Step diameters: 5, 7, 9, 11, 13, 15, 17, 19, 21, 22.5 mm
• Shank type: Cylindrical
• Shank diameter: 10 mm
• Overall length: 75 mm
• Flute length: 50 mm
• Point angle: 118°
• Max material thickness: 4 mm
• Cutting direction: Right-hand
• Self-centering: Yes
• Deburring: Yes
• Standard: DIN 8037

Tips

Use a cutting fluid when drilling steel to extend bit life. For clean holes in thin sheet metal, clamp the workpiece securely and drill at a moderate speed. The split point eliminates the need for center punching.