| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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Smooth, Graduated Drilling for Metal & Plastic
This tapered step drill bit is designed for precise, burr-free drilling across a wide range of materials. Engineered from premium high-speed steel (HSS), it delivers smooth, gradual hole enlargement-ideal for sheet metals such as aluminum, brass, and mild steel, as well as plastics like PVC and acrylic.
Tapered Profile with Built-In Deburring Function
Featuring a precision-ground tapered step design, this bit enables seamless transitions between hole diameters, reducing tool chatter and improving dimensional accuracy. Each step includes a deburring edge that leaves clean, finished holes-minimizing the need for post-processing.
Thermal Stability for Demanding Conditions
Enhanced through advanced heat treatment, the HSS core maintains hardness and edge integrity under high-speed drilling. This thermal resilience makes the bit suitable for continuous operations and heat-intensive tasks in metal and plastic fabrication.
Ideal for Professional & DIY Use
The tapered step configuration is perfect for applications requiring variable hole sizes with minimal tool changes. Widely used in electrical panel work, HVAC installations, auto repairs, and enclosure fabrication, it offers reliable performance in both industrial and home workshop environments
Precision-Ground Tapered Cutting Edge
Engineered with a refined tapered step profile, this drill bit ensures gradual and controlled enlargement of holes across multiple diameters. The precision-ground cutting edges deliver smooth entry into materials, minimizing shock and burrs-ideal for tasks that require clean, concentric results.
Fast-Start Split Point Tip
The self-centering split point initiates drilling instantly without walking or the need for a pilot hole. Especially useful on curved or hard surfaces, this design promotes accurate positioning and fast engagement on both metal and plastic workpieces.
Optimized Step-to-Step Chip Evacuation
Each tapered step incorporates enhanced flute geometry to ensure smooth chip flow and heat dissipation during progressive drilling. This significantly reduces clogging and friction, ensuring clean transitions between sizes with minimal resistance.
Anti-Corrosion Finish for Longevity
Coated with a protective surface finish (such as TiN or TiAlN), the bit resists rust, oxidation, and surface wear in tough jobsite conditions. This increases overall tool life and reliability when drilling under high-speed or repetitive conditions.
Stable, Vibration-Free Performance
The balanced tapered design reduces axial load and vibration during operation. Whether using a cordless drill or press machine, users benefit from stable control and reduced operator fatigue, making it ideal for electricians, panel installers, and sheet metal fabricators.
1. Exceptional Heat Resistance & Edge Durability
Crafted from high-grade high-speed steel (HSS), our tapered step drill bit delivers outstanding wear resistance and thermal stability. It stays sharp during extended use, even when drilling into hard materials like stainless steel, aluminum, or PVC-making it a reliable solution for high-speed, high-friction environments.
2. Smooth, Gradual Hole Expansion Across Multiple Sizes
Designed with a tapered step profile, the bit enables progressive drilling through multiple diameters in a single pass. This allows for a smoother transition between steps, reducing the chance of snags or sudden resistance and eliminating the need to switch tools mid-task.
3. Burr-Free Finishes with Built-In Deburring Effect
Each step is engineered to not only cut precisely but also leave a clean, finished edge behind. The tapered geometry minimizes burr formation on both metal and plastic surfaces, reducing the need for post-processing and ensuring a professional-grade result every time.
4. Universal Fit for Versatile Applications
Perfect for use with cordless drills, drill presses, and handheld tools, this bit is ideal for professionals in electrical work, sheet metal fabrication, HVAC installation, and panel construction. Its tapered design enhances control and accuracy, especially in progressive drilling scenarios.
5. Trusted by Professionals and DIYers Alike
Whether you're installing junction boxes, modifying panels, or fabricating custom enclosures, this drill bit offers stable performance, extended service life, and high efficiency-making it an essential tool in any workshop or jobsite.
1. CNC Precision Grinding for Progressive Accuracy
Our tapered step drill bits are crafted using CNC precision grinding to ensure uniform taper transitions, concentric cutting edges, and precise tip centering. This manufacturing approach enables smooth, progressive drilling across a range of diameters-minimizing vibration and enhancing hole quality in both metal and plastic substrates.
2. Vacuum Heat Treatment for Longevity
Each bit undergoes vacuum heat treatment, boosting surface hardness while preserving core toughness. This dual enhancement improves durability under heat-intensive conditions, making the bit ideal for drilling materials such as stainless steel, aluminum, PVC, and ABS with long-term reliability.
3. Ultra-Fine Polishing for Smooth Entry and Exit
A high-polish finish on the flutes reduces surface friction, improves chip ejection, and prevents thermal buildup. This is essential for achieving the smooth, uninterrupted hole enlargement associated with progressive step drilling, especially on thermoplastics and thin-walled metals.
1. Clean Steel Structure via EAF + LF + VD + RS ESR
Our HSS bits are made from ultra-pure steel refined through Electric Arc Furnace (EAF), Ladle Refining (LF), Vacuum Degassing (VD), and Electro-Slag Remelting (RS ESR). This results in uniform microstructure, reduced impurities, and enhanced edge toughness-crucial for smooth taper progression through layered materials.
2. Precision Thermal Processing for Edge Integrity
A thermal cycle that includes quenching, cryogenic treatment, and tempering raises hardness up to HRC 67 while preserving fracture resistance. This ensures high-speed, low-resistance cutting performance needed for taper-style step drilling in demanding electrical, fabrication, and panel-modification tasks.
3. RS ESR Edge Enhancement for Superior Wear Resistance
Rapid Solidification ESR strengthens the cutting edges with finely dispersed carbides and cobalt, improving edge retention and cutting consistency-especially critical for tapered geometries under continuous load.
1. Material Versatility: M35 HSS Standard
Our standard material is M35 high-speed steel due to its ideal balance of red hardness and toughness. M2 and M42 variants are also available to suit application-specific needs.
2. Customized Taper Geometry & Coatings
We support custom taper transitions, flute lengths, helix angles, and step progression patterns. Optional coatings such as TiN, TiAlN, and TiCN reduce friction and boost tool life in abrasive or high-speed operations.
1. Multi-Taper Flute Design for Debris Clearance
The flutes between steps are optimized to channel chips smoothly, prevent clogging, and stabilize drill motion during diameter transitions-critical for achieving progressive drilling without chatter or edge distortion.
2. Optimized Cutting Angles for Smooth Penetration
Each cutting step is engineered to reduce axial load and support seamless hole enlargement across various layers. This ensures precision entry, especially on curved metal panels and brittle plastics.
3. Application-Driven Coatings for Peak Performance
Our drill bits can be finished with TiAlN for high-temperature performance or TiCN for extreme wear environments-ensuring consistent taper quality and reduced tool replacement rates over time.
Q1: What makes this drill bit different?
A: It has a tapered step design, which lets you drill different hole sizes smoothly with one bit. It reduces vibration and makes cleaner holes than regular bits.
Q2: What materials can it drill?
A: It works well on thin metals like stainless steel, aluminum, and brass, as well as plastics such as PVC and acrylic.
Q3: Are different sizes available?
A: Yes. We offer various size ranges and can customize step sizes, flute designs, and coatings like TiN or TiAlN.
Q4: Can I use it with a regular drill?
A: Yes. It works with handheld, cordless, or bench drills, and is great for high-speed or repeated drilling tasks.
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