| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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1. Purpose-Built for Professional Metal Drilling
This five-piece step drill bit set is engineered from industrial-grade high-speed steel (HSS), ideal for drilling clean, accurate holes in stainless steel, aluminum, mild steel, and other sheet metals. Each bit features a stepped cone design, allowing for graduated hole sizes with a single tool-eliminating the need to switch bits during tasks.
2. Clean, Burr-Free Drilling with Precision Control
Each bit is equipped with sharp HSS cutting edges and a multi-flute spiral design that ensures smooth chip evacuation and stable drilling. The result: reduced vibration, accurate sizing, and burr-free finishes-perfect for control panels, automotive parts, HVAC work, and fabrication projects.
3. Industrial-Grade HSS for Long-Term Durability
Crafted from heat-treated high-speed steel, these bits offer exceptional hardness, wear resistance, and thermal stability. Designed to withstand heavy-duty, high-speed drilling without bending or dulling-ideal for continuous use in professional workshops or jobsite environments.
4. Versatile Step Sizes for Maximum Efficiency
With five step drill bits in varying diameter ranges (e.g., 4-12mm, 4-20mm, 4-32mm, etc.), this set provides the flexibility to handle multiple hole sizes across different applications. Compatible with both handheld drills and drill presses, it's a time-saving solution for professionals needing precision and performance in one compact set.
5. Designed for Multi-Material Performance
While optimized for sheet metal, this set also performs reliably on PVC, acrylic, laminates, and thin wood panels-making it suitable for electricians, mechanics, maintenance crews, HVAC installers, and fabrication professionals handling a wide variety of materials.
1. Sharp and Durable HSS Cutting Edges
Each drill bit is crafted from industrial-grade high-speed steel (HSS), offering excellent red hardness, cutting strength, and wear resistance. It maintains sharpness under high-speed drilling and delivers clean, accurate holes in stainless steel, carbon steel, aluminum, and other metals-without deformation or excessive burrs.
2. Multi-Step Cone Design for Versatile Sizing
Each bit features a conical step profile that allows for drilling multiple hole sizes with a single tool. Ideal for switch panels, junction boxes, and metal enclosures. Laser-engraved size markings ensure fast identification and drilling precision.
3. Optimized Spiral Flute for Smooth Chip Removal
The spiral flute design promotes fast chip evacuation and reduces heat buildup during continuous drilling. This improves cutting efficiency, minimizes clogging, and extends tool life-especially useful for heavy-duty or high-speed applications.
4. Corrosion-Resistant Polished Finish
Finished with a polished anti-rust coating, the bits resist corrosion from moisture, lubricants, and metal debris. Whether in a workshop or on a jobsite, this set is built to withstand challenging environments like HVAC, electrical, and automotive work.
5. Balanced and Comfortable for Prolonged Use
Engineered for smooth control with reduced vibration, the lightweight yet robust construction provides operator comfort. Ideal for both cordless drills and drill presses, offering consistent performance with less fatigue during extended use.
1. Professional-Grade HSS for Demanding Metalwork
Made from premium high-speed steel, these bits offer outstanding resistance to heat and wear. They stay sharp through repeated use on tough metals like stainless and carbon steel-perfect for high-efficiency drilling in industrial or workshop settings.
2. One Set, Multiple Hole Sizes
Covering a range of step sizes (e.g., 4-12mm, 4-20mm, 4-32mm), this five-piece set lets you drill various hole diameters without switching tools. It saves time and boosts efficiency for metal fabrication, control panel work, and general installation tasks.
3. Designed for Professionals and Precision DIY Users
Whether you're a metalworker, electrician, HVAC installer, or experienced DIY enthusiast, this set delivers the speed, control, and clean results you expect from professional-grade tooling. Each bit combines durability, versatility, and accuracy in one solution.
Each drill bit in the set is CNC-ground with concentric step geometry, ensuring precise, burr-free hole creation across a range of metal types. The sharp cutting edges and balanced design reduce walking and eliminate the need for pilot holes-ideal for stainless steel, mild steel, aluminum, and other sheet materials.
Constructed from premium high-speed steel (HSS) and heat-treated under controlled conditions, each bit offers excellent edge retention, toughness, and resistance to thermal stress. These characteristics make the set perfect for repetitive, high-speed drilling tasks in professional fabrication and installation work.
The flutes are highly polished to reduce friction and support smooth chip flow. This minimizes heat buildup, lowers wear, and extends tool life-especially important for professionals who rely on consistent performance during high-volume drilling.
The drill bits are forged using electric arc furnace (EAF) technology and vacuum degassed for metallurgical purity. This results in superior wear resistance, impact strength, and dimensional stability-making the set suitable for harsh working conditions such as automotive repair, HVAC installation, and heavy-duty sheet metal work.
Advanced quenching and tempering give each bit an ideal combination of surface hardness and core ductility. This minimizes the risk of cracking or chipping during aggressive drilling into layered or reinforced materials.
The step profiles across the five bits cover a wide range of hole diameters, allowing users to complete multiple drilling tasks without switching tools. This is particularly valuable in switchgear setups, panel modification, cable routing, and conduit installations.
We offer tailored specifications for industrial clients, including variable flute geometries, specific step sizing, and optional coatings such as:
TiN (Titanium Nitride) - General-purpose wear resistance
TiAlN (Titanium Aluminum Nitride) - Enhanced performance in high-heat, abrasive applications
Custom packaging and OEM configurations are also available for workshop, fabrication, and tool distribution partners.
Q1: What makes this step drill bit set different from standard metal drill bits?
A: Unlike conventional twist drill bits that require separate tools for different hole sizes, this five-piece step drill bit set features precision-engineered stepped profiles. Each bit can drill multiple hole diameters, reducing tool changes and boosting efficiency. Made from CNC-machined high-speed steel (HSS), the bits provide excellent heat resistance, durability, and clean, concentric holes in materials like stainless steel, aluminum, and mild steel.
Q2: What materials can this step drill bit set be used on?
A: The set is specifically designed for thin and medium-gauge metals, including stainless steel, galvanized steel, carbon steel, brass, aluminum, and copper. It also performs well on hard plastics and composite panels. Perfect for professionals working in metal fabrication, electrical panel modification, HVAC installation, and automotive projects.
Q3: Are there different sizes and configurations included in the set?
A: Yes. The five-piece set includes a range of step configurations typically covering diameters from 4mm to 32mm or beyond, depending on the model. Each bit is laser-etched with size markings for easy identification. Custom options are also available, including special step ranges, flute geometries, shank types (round, hex, tri-flat), and wear-resistant coatings such as TiN or TiAlN. OEM and ODM services are supported for professional and industrial clients.
Q4: Can these drill bits be used with handheld and high-speed drills?
A: Absolutely. Each bit is heat-treated for strength and optimized for use with both handheld cordless drills and drill presses. They remain sharp and stable at high RPMs, making them ideal for jobsite use, shop-floor fabrication, or field installations where precision and reliability are essential.
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