4–32mm HSS Spiral Grooved Step Drill Bit – High-Speed Steel Metal Drilling Tool

📖 Description

• This 4–32mm step drill bit is crafted from high-speed steel (HSS) with a spiral groove design, offering efficient, clean drilling through metal, steel, aluminum, and plastic. Its multi-size stepped structure allows for multiple hole diameters with one bit, while the spiral groove improves chip removal and reduces friction, making it perfect for industrial, workshop, and DIY use.

🔧 Technical Specifications

• Material: High-Speed Steel (HSS), with options including M35 cobalt alloy for enhanced durability.
• Coating: Titanium or nitriding treatments to reduce friction and increase wear resistance.
• Drilling Range: 4mm to 32mm, typically in 2mm increments (15 steps).
• Flute Design: Spiral grooves for efficient chip removal and smoother drilling.
• Shank Type: Hexagonal (commonly 1/4″ or 6.35mm) for secure grip in drill chucks.
• Suitable Materials: Steel, aluminum, brass, wood, plastic, and other thin materials.​

⚙️ Key Features

• Versatility: One bit can drill multiple hole sizes, reducing the need for multiple tools.
• Precision: Spiral groove design ensures clean cuts and minimizes burrs.
• Durability: Coatings like titanium enhance the bit’s lifespan by reducing heat buildup.
• Ease of Use: Hex shank provides stability during drilling, and the design often eliminates the need for pilot holes.​

🛠️ Applications

• Electrical Installations: Drilling holes for cable entries in panels.
• Automotive Work: Creating openings in vehicle bodywork for accessories.
• HVAC Systems: Making holes in ducts for sensor or vent installations.
• DIY Projects: Suitable for various home improvement tasks involving different materials.​