| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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Wide Application with Superior Accuracy
These high-precision HSS step drill bits are meticulously engineered to deliver consistently clean, burr-free holes in both metal and plastic. Perfect for aluminum, brass, mild steel, PVC, acrylic, and composite materials, each bit offers multi-diameter capability with exceptional cutting control-ideal for tasks requiring professional finish quality.
Precision-Machined Steps with Built-In Deburring
Each step is CNC-ground for dimensional accuracy and smooth transitions between hole sizes. The integrated deburring function ensures a clean edge at every diameter-eliminating the need for manual post-processing and significantly improving efficiency in production environments.
Advanced Heat-Treated HSS for Durability
Constructed from heat-treated high-speed steel, the bits deliver excellent hardness and structural stability under high-speed and high-friction drilling conditions. Their thermal resilience ensures long-lasting sharpness and reduced wear, even when used on tougher materials.
Versatile Across Industries
Whether you're working in electrical installation, HVAC, precision panel cutting, or plastic enclosure modification, this step drill bit offers unmatched hole quality and repeatability. Its clean-cut performance makes it a go-to tool for professionals and demanding DIY users seeking accuracy without compromise.
1. Precision-Ground Cutting Edge for Clean Entry
Engineered from high-speed steel (HSS), each bit features ultra-sharp, CNC-ground cutting edges. These edges are designed for smooth, precise penetration, significantly reducing burr formation and delivering consistently clean, accurate holes in metal and plastic substrates.
2. Self-Centering Split Point for Accurate Start
The precision split-point tip provides self-centering capability, eliminating the need for a pilot hole. This ensures minimal walking and perfect alignment-critical for clean hole drilling in panels, enclosures, and sheet materials.
3. Optimized Flute Design for Smooth Chip Ejection
A high-efficiency spiral flute design enhances chip evacuation at each step, minimizing friction, heat, and clogging. This keeps the cutting edge cool and clean-supporting consistently smooth hole walls and extended bit life.
4. Protective Anti-Corrosion Coating for Longevity
Each bit is treated with a polished or high-performance coating (e.g., TiN), which not only prevents rust but also enhances wear resistance. This ensures long-lasting accuracy, even in demanding industrial or outdoor environments.
5. Balanced Multi-Diameter Cutting in One Tool
With its carefully engineered stepped profile, the bit allows for precise drilling of multiple hole sizes without changing tools. This enhances speed and accuracy-ideal for precision fabrication, electrical junction box work, and tight-tolerance projects.
1. Exceptional Precision and Clean Hole Quality
Engineered for demanding applications, our high-precision step drill bits deliver consistently clean, concentric holes across various materials. The step geometry is CNC-machined to tight tolerances, reducing chatter and minimizing burrs-ensuring professional-grade finishes in both metal and plastic.
2. Enhanced Wear Resistance and Thermal Stability
Crafted from premium high-speed steel (HSS) and heat-treated for durability, these drill bits maintain sharpness under intense friction and high-speed use. Whether you're drilling stainless steel, aluminum, PVC, or ABS, the bit stays cool and sharp, reducing tool wear and workpiece damage.
3. Multi-Step Cutting Without Compromising Accuracy
Each bit features clearly defined steps for drilling multiple diameters with high repeatability. The gradual step transitions allow smooth hole expansion while preserving accuracy and surface finish-eliminating the need for rework or additional deburring.
4. Ideal for Precision-Critical Applications
From control panels and switch boxes to electronics enclosures and automotive trim, these bits provide reliable performance for professionals in electrical work, sheet metal fabrication, and plastic processing. The high-precision cut ensures a perfect fit for fasteners, connectors, and fittings.
5. Efficiency Meets Versatility
By combining multi-diameter capability, burr-free hole quality, and a high degree of accuracy, our step drill bit offers a streamlined solution for both high-volume workshops and DIY users seeking clean, dependable results in every pass.
Advanced Manufacturing Capabilities for Superior Accuracy and Clean Results
1. CNC Precision Grinding
Each step drill bit is manufactured using high-precision CNC grinding to achieve perfectly concentric geometry and uniform step heights. The sharp cutting edges and true-centered tips enable clean, accurate drilling across various diameters-ideal for applications requiring smooth, burr-free holes in metal or plastic panels.
2. Vacuum Heat Treatment for Core Toughness and Surface Hardness
Every bit undergoes vacuum heat treatment to enhance both the core's toughness and the surface's hardness. This ensures excellent performance under heat and stress, making it suitable for repetitive drilling in materials such as stainless steel, aluminum, PVC, and ABS.
3. Ultra-Fine Polishing for Friction Reduction
The polished surface minimizes friction, improves chip evacuation, and reduces heat buildup. This not only allows for smoother and faster drilling but also helps prevent surface damage and melting-especially important for thermoplastics and soft metals.
1. Premium Steel Purification: EAF + LF + VD + RS ESR
Our drill bits are crafted from ultra-clean high-speed steel using Electric Arc Furnace (EAF), Ladle Refining (LF), Vacuum Degassing (VD), and Electro-Slag Remelting (RS ESR). This process eliminates impurities and improves structural integrity-essential for precision drilling in tough or layered materials.
2. Thermal Optimization System
The bits undergo a complete thermal cycle including quenching, cryogenic treatment, and precision tempering. This process achieves hardness levels up to HRC 67 while maintaining resistance to cracking and edge chipping, ensuring high performance under industrial-grade drilling conditions.
3. RS ESR Edge Reinforcement Technology
Rapid Solidification ESR enhances edge strength by evenly distributing carbides and cobalt, improving wear resistance and edge retention. This enables clean, high-speed hole creation even under heavy thermal and mechanical loads.
1. Material Options: M35 as the Core Choice
We prioritize M35 high-speed steel for its exceptional hardness-to-toughness ratio, ensuring long life and consistent performance in both metal and plastic. M2 and M42 variants are also available to meet specialized requirements.
2. Geometry & Coating Customization
We offer customization for step count, flute length, helix angle, and shank style (round or hex). Optional PVD coatings such as TiN, TiAlN, and TiCN further boost tool life by reducing friction and enhancing thermal resistance-ideal for demanding use cases.
Optimized Multi-Step Flute Design: Ensures fast chip removal and thermal control, reducing clogging and overheating.
Engineered Cutting Angles: Lower axial force and prevent material deformation-critical for thin metals and plastics.
Application-Specific Coatings: Improve lifespan and deliver clean, burr-free holes even in high-speed operations.
Q1: What makes high-precision step drill bits different from standard drill bits?
A: Unlike standard twist bits, our high-precision step drill bits feature a multi-step design that allows you to drill various hole sizes with a single bit. Crafted from high-speed steel (HSS), they deliver superior sharpness, heat resistance, and wear durability. This ensures consistently clean, burr-free holes-ideal for precision work in metal panels, plastic sheets, and wood laminates.
Q2: What materials can these step drill bits be used on?
A: These step drill bits are optimized for drilling thin metals (like aluminum, brass, and mild steel) as well as plastic materials including PVC, acrylic, and ABS. Their precise cutting geometry makes them suitable for applications that demand smooth finishes, such as electrical enclosures, switchboards, and custom panel fabrication.
Q3: Are different step ranges and sizes available?
A: Yes, our high-precision step drill bits come in various step ranges-such as 4-12mm, 4-20mm, and 4-32mm-with engraved size markings for accuracy. We also offer custom configurations with different flute lengths, coatings (e.g., TiN, TiAlN), and shank types (round or hex) for professional or specialized needs.
Q4: Can these bits be used with high-speed drills?
A: Absolutely. The HSS construction and optional anti-friction coatings allow for smooth, high-RPM drilling while maintaining sharpness and stability. These bits are compatible with both corded and cordless drills, making them ideal for high-speed, high-precision tasks in industrial, commercial, and DIY environments.
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