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Customized: | Customized |
Standard: | GB/T |
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Optimized for Thin Metal Sheets
These multi-size step drill bits are specifically designed for precision drilling in thin metal sheets. Ideal for materials like aluminum, brass, and mild steel, they also handle plastics such as PVC and acrylic with ease. Engineered to deliver clean, burr-free holes, each bit combines multiple drilling diameters into one convenient tool.
Efficient Multi-Diameter Drilling & Deburring
Featuring a stepped design, each bit allows you to drill various hole sizes without the hassle of bit changes. The accurately cut steps enable smooth transitions between diameters, while built-in deburring edges provide a clean finish at each level-minimizing the need for post-drill cleanup or secondary processing.
Durable High-Speed Steel Construction
Crafted from high-speed steel (HSS) and enhanced through advanced heat treatment, these drill bits offer excellent wear resistance and thermal stability. Their hardened edges stay sharp longer, even during high-speed drilling through metal, ensuring consistent performance and long tool life.
Essential Tool for Metalworking Professionals
Ideal for electricians, HVAC technicians, and metal fabricators, these step drill bits are indispensable for panel work, conduit installation, enclosure modification, and other precision tasks involving thin metal sheets. Also suitable for hobbyists and DIYers who demand professional-grade results.
1. Ultra-Sharp Cutting Edge for Effortless Penetration
Crafted from high-speed steel (HSS), these step drill bits feature precisely ground cutting edges that penetrate aluminum, brass, and mild steel sheets with ease. The sharp edges reduce resistance during drilling, minimize burr formation, and deliver clean holes with less effort and post-processing.
2. Self-Centering Split Point Tip for Accurate Starts
The anti-slip split point tip eliminates the need for center punching, ensuring accurate positioning right from the start. This design prevents the bit from walking on curved or hard metal surfaces, providing excellent control and precision for thin metal work.
3. Step-by-Step Chip Removal with Spiral Flute Design
Each step is optimized for chip evacuation, featuring a spiral flute that efficiently clears metal and plastic shavings. This design reduces heat buildup and prevents material clogging, resulting in smoother drilling and prolonged tool life, even with continuous use.
4. Corrosion-Resistant Coating for Long-Term Durability
The drill bits are treated with a polished or coated surface (such as titanium coating, where applicable), enhancing resistance to rust and wear. This durability is especially valuable for professionals working in environments with moisture or exposure to lubricants.
5. Balanced Multi-Step Geometry for Versatile Drilling
The stepped geometry offers multiple hole sizes in one bit, reducing the need for frequent tool changes and improving work efficiency. Designed for balance and control during operation, these bits are ideal for tasks such as electrical panel installation, automotive sheet work, and thin metal fabrication.
1. Exceptional Wear Resistance & Heat Tolerance for Thin Metal Work
Engineered from premium high-speed steel (HSS), our step drill bits are built to endure the high friction and heat generated when drilling into thin metal sheets. The enhanced hardness and thermal resistance ensure long-lasting sharpness and tool integrity, making them perfect for repeated use on materials such as aluminum, brass, and even stainless steel.
2. Multi-Diameter Drilling with Smooth, Burr-Free Finishes
Designed specifically for thin metal applications, each bit features a stepped profile that allows you to drill multiple hole sizes with a single tool. The precision-ground steps create clean, smooth holes without burrs, significantly reducing the need for secondary deburring or surface treatment-even on delicate sheet metals.
3. Precision and Versatility for Professional-Grade Results
Whether you're installing electrical panels, modifying enclosures, or fabricating metal sheets, this multi-size step drill bit delivers reliable, clean results. Trusted by electricians, HVAC professionals, metalworkers, and DIYers, it's ideal for thin metal and plastic tasks that demand accuracy, consistency, and ease of use.
Our multi-size step drill bits are crafted through CNC precision grinding, ensuring consistent step heights, razor-sharp cutting edges, and perfectly centered tips. This results in clean, burr-free drilling across various diameters-ideal for aluminum, brass, and other thin sheet metals-while minimizing vibration and improving high-speed stability.
Each bit undergoes advanced vacuum heat treatment, boosting both surface hardness and internal toughness. This allows for reliable, repeated drilling in materials like stainless steel, aluminum, and PVC, while resisting heat-induced wear and edge degradation.
A finely polished surface reduces friction, improves chip evacuation, and lowers heat generation-especially important when drilling thin, soft metals or thermoplastics. The result is cleaner holes and reduced workpiece damage, even during extended operations.
Our bits are made from ultra-clean high-speed steel refined through Electric Arc Furnace (EAF), Ladle Refining (LF), Vacuum Degassing (VD), and Electro-Slag Remelting (RS ESR). This advanced metallurgy enhances toughness and ensures stability during thin metal or composite panel drilling.
A precision blend of quenching, cryogenic treatment, and tempering delivers hardness up to HRC 67 with excellent crack resistance. This allows the drill bit to maintain performance in high-speed, high-pressure environments such as electrical panel or enclosure modification.
Enhanced through RS ESR processing, the cutting edges gain uniform carbide and cobalt reinforcement, resulting in excellent edge retention and wear resistance during thin metal drilling under thermal load.
While M2 and M42 options are available, M35 HSS is our preferred material for thin metal applications, offering a superior balance of hardness and toughness needed for sharp, long-lasting cutting.
Available with tailored step geometries, flute lengths, and helix angles. Optional PVD coatings-such as TiN, TiAlN, or TiCN-further reduce friction and thermal fatigue, ideal for industrial applications involving repetitive thin metal drilling.
The flutes between each step are precision-engineered to remove chips efficiently and maintain cooling, helping to prevent clogging when drilling thin sheet metal or soft plastics at higher speeds.
Cutting edges and step transitions are optimized to reduce axial force and material deformation-critical when working with thin-walled or soft-layered metals and plastics.
From TiAlN for heat resistance to TiCN for extreme wear conditions, our coatings are chosen to meet the demands of precision drilling in electrical, automotive, and fabrication industries.
Q1: What makes high-speed steel (HSS) step drill bits different from regular drill bits?
A: HSS step drill bits are made from high-speed steel, offering superior heat resistance, wear resistance, and edge retention compared to standard steel bits. Unlike regular twist bits, step drill bits can create multiple hole sizes with a single tool-ideal for thin metal sheets-while also delivering clean, burr-free holes with minimal need for deburring.
Q2: What materials can these step drill bits handle?
A: These bits are optimized for thin metals such as aluminum, brass, and mild steel. They also work well on rigid plastics like PVC and acrylic. Whether you're modifying electrical panels, drilling enclosures, or fabricating sheet metal parts, these bits provide precise, smooth results across both metal and plastic surfaces.
Q3: Are these step drill bits available in different sizes?
A: Yes. Each step drill bit features multiple hole sizes in one tool, and we offer various configurations to suit different industrial or DIY needs. Custom step profiles and coatings are also available upon request for specific applications or materials.
Q4: Can these drill bits be used for high-speed drilling?
A: Absolutely. These bits are designed for high-speed, low-resistance drilling, especially through thin sheet metal. Their precision-ground edges, spiral flutes, and HSS construction ensure they stay sharp and stable even under rapid or repetitive use.