| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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This step drill bit is crafted from industrial-grade high-speed steel (HSS) and is ideal for drilling through stainless steel, aluminum, mild steel, and other thin metals. Its stepped cone shape allows you to drill multiple hole sizes with a single tool-perfect for control panels, enclosures, and sheet metal fabrication.
Each step is clearly laser-etched with metric or imperial size indicators for quick, accurate reference during drilling. The permanent markings resist wear and stay visible even after extended use, allowing precise control when drilling holes of varying diameters.
The precision-ground HSS cutting edges, combined with a multi-flute design, ensure smooth chip evacuation and reduced heat buildup. This leads to cleaner holes, minimal burring, and improved surface finishes-especially important in metalworking, automotive, and HVAC applications.
Built from heat-treated high-speed steel, this bit resists wear, dulling, and distortion, even under high-speed and high-load drilling. It's engineered for long-lasting performance in workshop and jobsite environments.
Compatible with cordless drills, drill presses, and handheld power tools, this step drill bit eliminates the need for constant bit changes. Its versatile stepped profile allows for drilling through plastic, PVC, and layered materials-making it a must-have for electricians, fabricators, and DIY professionals.
1. Sharp and Durable HSS Cutting Edges
Constructed from high-speed steel (HSS), this step drill bit delivers excellent red hardness, wear resistance, and edge durability. It maintains sharpness under high-speed conditions, enabling clean, precise hole drilling in stainless steel, carbon steel, aluminum, and other metal sheets without deformation or excessive burrs.
2. Laser-Engraved Size Markings for Instant Reference
Each step on the cone features clear laser-etched markings that won't fade or wear off. These permanently engraved size indicators allow quick identification and precise hole diameter selection-especially useful when working on electrical boxes, switch panels, and custom fabrications.
3. Spiral Flute Design for Efficient Chip Removal
The optimized spiral flute geometry ensures smooth chip evacuation and minimizes heat accumulation during continuous drilling. This enhances performance, reduces the risk of clogging, and extends the lifespan of the cutting edge-particularly useful during repetitive or deep drilling operations.
4. Corrosion-Resistant Polished Finish
The drill bit's polished surface provides resistance to rust, moisture, and metal debris, ensuring long-term reliability in harsh environments. Whether used in an indoor workshop or exposed jobsite, the bit remains dependable and clean-cutting.
5. Stable, Low-Vibration Operation
Designed with balance and operator comfort in mind, this bit reduces vibration and ensures smooth drilling. Its center-aligned profile supports steady handling, making it suitable for handheld power tools and drill presses alike-perfect for electricians, HVAC technicians, and metalworking professionals.
1. Superior Performance with High-Speed Steel (HSS)
Crafted from industrial-grade high-speed steel, this step drill bit delivers outstanding wear and heat resistance. It stays sharp after repeated use, making it ideal for drilling stainless steel, carbon steel, aluminum, and other metals in high-speed, precision-demanding environments.
2. One Bit for Multiple Hole Sizes - With Permanent Size Markings
The stepped cone design allows you to drill multiple hole diameters using a single tool-saving time and eliminating the need to switch bits. Each step features laser-engraved size indicators, providing clear, permanent markings that won't fade, ensuring accurate hole selection every time.
3. Built for Professionals and Precise DIY Applications
Whether you're an HVAC installer, electrician, or serious DIYer, this drill bit provides the precision and versatility needed for demanding work. Laser-etched step indicators combined with smooth step transitions and reliable chip removal ensure professional-grade results, even in tight or repetitive jobs.
CNC Precision-Ground Steps with Laser Engraved Size Markings
Each step of the drill bit is CNC-ground and permanently laser-engraved with metric size markings for fast, accurate hole sizing. The engraved graduations resist wear and fading, making them easy to read even after prolonged use in harsh environments.
Optimized HSS Core with Advanced Heat Treatment
Constructed from premium high-speed steel (HSS) and subjected to tightly controlled heat treatment, the bit offers excellent edge retention and thermal durability. It stays sharp through continuous, high-speed operations on stainless steel, aluminum, and mild steel.
Polished Spiral Flute for Smooth Chip Ejection
The highly polished spiral flute improves chip clearance and reduces friction, minimizing heat buildup and extending tool life. This results in stable, vibration-free drilling and cleaner hole finishes in metalworking applications.
High-Purity HSS Base Material
Made using Electric Arc Furnace (EAF) and vacuum degassing, the HSS material delivers superior purity and consistency, which translates into excellent toughness and wear resistance-ideal for industrial use such as HVAC, electrical panel work, and automotive maintenance.
Balanced Hardness & Fracture Resistance
Advanced quenching and tempering optimize hardness while maintaining internal ductility, reducing the risk of tip breakage or chipping when drilling through layered or reinforced sheet metal.
Multi-Step Design with Controlled Entry
The stepped profile enables controlled starting on flat or curved surfaces, with multiple diameters available in one tool. It's perfect for conduit routing, switchgear setups, and multi-size hole tasks in fabrication shops.
Custom Options Available
We support OEM/ODM customization, including:
Step Configurations (e.g., 4-20mm / 4-32mm)
Shank Types (hex, round, tri-flat)
Coatings (TiN, TiAlN, TiCN) for extreme environments
Optimized Design for Sheet Metal Drilling with High-Visibility Step Indicators
Engineered with a high-efficiency multi-flute design, this step drill bit delivers superior chip evacuation when drilling through thin sheet metal. The flute geometry ensures reduced friction, minimal heat buildup, and clog-free performance, making it ideal for stainless steel, galvanized steel, and aluminum panels.
Each step is precisely angled for efficient metal penetration, maintaining clean, accurate hole sizes without deformation. The smooth step-to-step transition minimizes burrs and edge tearing-especially critical in electrical enclosures and control panels.
Each step is permanently laser-etched with metric size markings, ensuring quick visual reference and accurate hole sizing on the job. Unlike printed or painted indicators, laser markings resist wear, dirt, and oil, making them ideal for shop-floor use.
Available with industrial-grade PVD coatings to withstand extreme heat and pressure:
TiAlN Coating: High-temperature resistance for continuous drilling in stainless and alloy steels.
TiCN Coating: Extra hardness and reduced friction for use on abrasive metals or in repetitive drilling operations.
These coatings dramatically extend tool life while maintaining sharpness and performance under high-load, high-RPM conditions such as HVAC, automotive fabrication, and control cabinet installations.
Q1: What makes this step drill bit different from standard metal drill bits?
A: This drill bit features a stepped cone design that allows you to drill multiple hole sizes using a single tool-eliminating the need for frequent bit changes. Unlike standard twist drills, it's CNC precision-ground from high-speed steel (HSS) for enhanced heat resistance, wear durability, and superior hole accuracy. The laser-engraved size markings on each step ensure quick and easy diameter identification during use.
Q2: What materials is this drill bit suitable for?
A: This bit is engineered for thin and medium-gauge metal sheets, including:
Stainless steel
Galvanized steel
Carbon steel
Aluminum, copper, brass
It also works effectively on certain plastics such as PVC, acrylic, and composite panels. Ideal for metalworking, control panel installation, HVAC systems, electrical enclosures, and automotive applications.
Q3: Are different sizes and specifications available?
A: Yes. We offer a wide range of standard size combinations (e.g., 4-12mm, 4-20mm, 4-32mm), and we support OEM/ODM customization. Options include:
Non-standard step sizes
Custom flute geometry (spiral or straight)
Shank types (hex, round, or tri-flat)
Laser-engraved metric or imperial scale
Surface coatings (e.g., TiN, TiAlN, TiCN)
Q4: Can this drill bit be used with cordless or handheld drills?
A: Absolutely. This step drill bit is made from heat-treated HSS for optimal strength at high RPMs and is compatible with handheld drills, cordless drivers, and drill presses. It maintains sharpness under continuous use and offers stable, burr-free performance-ideal for field work and shop environments alike.
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