| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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1. Precision-Engineered for Metal Drilling
This spiral step drill bit is made from industrial-grade high-speed steel (HSS), purpose-built for drilling into thin metal surfaces such as stainless steel, mild steel, and aluminum. Its stepped design allows users to create multiple hole sizes with one tool, delivering clean, progressive cuts without the need for tool changes.
2. Sharp Cutting Edge for Clean, Burr-Free Results
Featuring a CNC-ground, razor-sharp edge, the bit ensures precise penetration and reduced cutting resistance. The combination of sharp steps and concentric geometry allows for smooth, accurate drilling with minimal burrs-ideal for control panels, enclosures, automotive panels, and HVAC sheet metal.
3. Spiral Flute Design for Efficient Chip Evacuation
The bit's spiral flute structure improves chip removal and reduces heat buildup, especially during high-speed or repetitive drilling. This design minimizes clogging and vibration, enhancing control and extending tool life in both metal and plastic applications.
4. Heat-Treated HSS for Industrial Durability
Manufactured with premium HSS and hardened through advanced heat treatment, this step drill bit offers excellent wear resistance, hardness, and thermal stability. It resists dulling and deformation even under continuous use in demanding work environments.
5. Multi-Size Versatility for Greater Efficiency
With a single bit capable of drilling multiple diameters, it streamlines workflow and reduces downtime. Compatible with drill presses and handheld drills, it's the ideal solution for workshops, industrial maintenance, fabrication shops, and jobsite use.
1. Sharp and Durable HSS Cutting Edges
Constructed from premium high-speed steel (HSS), this spiral step drill bit offers excellent cutting strength, red hardness, and wear resistance. It maintains a sharp edge during high-speed drilling, delivering clean, accurate holes in stainless steel, carbon steel, aluminum, and other sheet metals-without deformation or excess burrs.
2. Multi-Step Tapered Design for Versatile Hole Sizes
Featuring a precisely machined stepped cone profile, this bit enables users to drill a wide range of hole diameters using a single tool. It's ideal for applications such as electrical panels, junction boxes, metal enclosures, and control cabinets. Laser-etched size markings on each step ensure quick identification and drilling accuracy.
3. Optimized Spiral Flute for Clean Chip Evacuation
The spiral flute geometry promotes efficient chip removal, minimizes heat buildup, and reduces jamming during continuous or high-speed drilling. This ensures smoother operation, less tool wear, and a cooler cutting surface-critical for professional and industrial use.
4. Corrosion-Resistant Polished Finish
Finished with a polished, rust-resistant surface treatment, the drill bit resists corrosion caused by lubricants, humidity, and metal debris. It's well-suited for both workshop and on-site use in HVAC, automotive repair, electrical installation, and general fabrication.
5. Balanced and Easy to Use for Extended Work
Lightweight yet structurally solid, the drill bit is engineered for optimal control and reduced hand fatigue. Its center-balanced design delivers smooth, vibration-free operation-ideal for use with handheld drills and drill presses by electricians, technicians, and metalworkers.
1. Industrial-Grade HSS for Long-Lasting Cutting Power
This drill bit is crafted from high-speed steel (HSS), known for its excellent resistance to heat, wear, and edge dulling. Designed for demanding metalworking applications, it remains sharp even during repeated high-speed drilling in stainless steel, carbon steel, and aluminum.
2. Multi-Diameter Drilling with Stepped Spiral Design
With its precisely machined stepped cone profile, this bit lets you drill multiple hole sizes using a single tool. The spiral flute design enhances chip evacuation and helps prevent overheating-perfect for electrical panels, control boxes, and general sheet metal fabrication.
3. Sharp Cutting Edges for Clean, Burr-Free Results
The razor-sharp, CNC-ground edges ensure smooth penetration and consistent hole sizing without tearing or distortion. The cutting geometry minimizes burr formation, delivering professional-quality finishes with minimal post-processing required.
4. Built for Pros and Advanced DIY Applications
Whether you're a metal fabricator, electrician, HVAC installer, or detail-focused DIYer, this spiral step drill bit offers precision, speed, and efficiency. It's ideal for tasks involving layered metals, thin-gauge panels, and thermoplastics-especially where accuracy and finish quality are critical.
Each drill bit features precision-ground, CNC-machined steps with razor-sharp cutting edges, allowing for smooth, stable drilling into stainless steel, aluminum, mild steel, and other thin metals. The sharp spiral step design reduces walking and ensures clean hole entry without a pilot hole.
Crafted from industrial-grade high-speed steel (HSS) and heat-treated under strict thermal controls, the bit offers excellent edge retention and resistance to heat and wear. It's built for high-speed, continuous use in metalworking applications such as enclosure fabrication and electrical panel installations.
A highly polished spiral flute design ensures fast chip removal, reduced friction, and minimal heat buildup. This improves drilling efficiency and prolongs the cutting edge's life-essential for operations involving repetitive drilling in metal sheets or composite layers.
Produced through electric arc furnace (EAF) melting and vacuum degassing, the high-speed steel core offers outstanding structural purity, hardness, and impact strength. It performs reliably in rugged environments such as HVAC work, automotive maintenance, and sheet metal fabrication.
Advanced tempering processes give the bit both surface hardness and internal ductility-minimizing the risk of chipping or breakage when drilling layered or reinforced metals. It maintains performance even in high-load, high-RPM environments.
The stepped spiral design offers a range of drilling diameters in one tool, ensuring smooth size transitions and accurate hole shaping. Ideal for conduit holes, switchgear cutouts, and structured cable installations.
We support tailored configurations, including custom step intervals, flute geometry, and optional coatings such as TiN or TiAlN. These coatings enhance wear resistance and reduce thermal stress during prolonged industrial use.
This drill bit features a precisely engineered spiral flute design that enables fast and consistent chip removal from thin metal sheets. The open spiral geometry reduces friction and heat buildup, preventing clogging and ensuring smooth, stable drilling-ideal for continuous use on stainless steel, aluminum, and galvanized metals.
Sharpened cutting edges and finely tuned step geometry allow for reduced resistance when drilling through layered or hardened metals. Each step transitions smoothly, minimizing burrs and edge deformation while maintaining excellent hole accuracy across various diameters.
Engineered to support professional PVD coatings that improve performance under extreme conditions:
TiAlN (Titanium Aluminum Nitride): Delivers high oxidation resistance and thermal stability-perfect for high-speed drilling in stainless and alloy steels.
TiCN (Titanium Carbonitride): Provides increased surface hardness and superior wear resistance, ideal for repeated or abrasive drilling environments.
These coatings help maintain sharpness, reduce tool wear, and extend bit lifespan in demanding industrial applications such as automotive bodywork, electrical cabinet installation, and precision metal fabrication.
Q1: How is this HSS spiral step drill bit different from standard twist or cone bits?
A: This drill bit combines a stepped cone profile with a spiral flute design, allowing you to drill multiple hole sizes with one tool while ensuring cleaner, more stable performance. Made from CNC-machined high-speed steel (HSS), it offers enhanced sharpness, precision, and resistance to heat and wear. The spiral flutes improve chip evacuation and reduce vibration-ideal for smooth, burr-free holes in stainless steel, aluminum, and other sheet metals.
Q2: What materials is this spiral step bit suitable for?
A: It's designed for thin to medium-gauge metals, including stainless steel, galvanized sheet, aluminum, brass, and carbon steel. It also performs well on rigid plastics and composite panels. This versatility makes it ideal for use in HVAC installation, electrical panel fabrication, automotive work, and precision DIY tasks.
Q3: Are different step ranges and shank types available?
A: Yes. The bit is available in various configurations (e.g., 4-12mm, 4-20mm, 4-32mm, etc.), with optional shank styles including round, hex, and tri-flat. Custom flute lengths, step geometries, and professional coatings like TiN or TiAlN are also available upon request for OEM and ODM applications.
Q4: Can it be used with cordless and high-speed drills?
A: Absolutely. The heat-treated HSS construction is engineered for compatibility with handheld drills, drill presses, and cordless drivers. Its spiral flute and center-balanced design minimize walking and heat buildup, enabling accurate, high-speed drilling even during extended use in workshop or field environments.
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