HSS Step Drill Bit Set for Metal and Wood Black Oxide Coated

Streamline your machining and carpentry workflows with this HSS step drill bit set designed for efficient material penetration. The spiral flute architecture actively clears chips while the black oxide coating minimizes surface friction and manages heat during prolonged cuts. Rather than repeatedly swapping fixed-diameter drills for uneven panels or conduit fittings, this unibit design punches clean, concentric holes up to its largest diameter in a single pass. The result is fewer tool changes, tighter tolerances, and smooth edges that typically bypass heavy deburring. Built as an indexable drill bit for demanding DIY supplies and metalworking applications, it delivers predictable sizing accuracy whether you are fabricating light gauge steel, aluminum brackets, or wooden assemblies.

Benefits & Practical Tips

• Begin each cut at the smallest step to establish perfect centering before progressing upward through the graduated diameters.
• Apply a light cutting lubricant when drilling dense metals to protect the black oxide finish and extend edge longevity.
• Keep feed pressure steady and allow the spiral geometry to manage chip evacuation; excessive force can compromise step alignment.

Product Specifications

• Core Material: High-speed steel (HSS)
• Surface Finish: Black oxide coated
• Form Type: Spiral step drill bit / Unibit
• Compatible Substrates: Metal and wood
• Mechanism: Indexable drill bit
• Market Category: DIY supplies and metalworking

Package Includes

• HSS step drill bit set (multiple sizes, black oxide coated)

Safety & Storage Reminders

Always clamp your workpiece securely before engaging the spindle, and adjust rotational speed according to material density to prevent thermal damage. After use, wipe the bits clean of moisture and residue to preserve the oxide layer, then store them in a dry container away from abrasive contact.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

Precision metalworking accessories and dependable fabrication tools supplied consistently since 2002 through intercyprus.com.