| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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Multi-Diameter Drilling Without Tool Changes
The stepped design allows users to drill multiple hole sizes using just one bit. Each step is CNC-machined for a smooth transition between diameters, enabling accurate hole sizing and built-in deburring with every cut-saving time and reducing cleanup.
Thermal Stability for Continuous Operation
Crafted from hardened high-speed steel and heat-treated for strength, the bit maintains sharpness under high RPMs and friction. This makes it ideal for high-speed drilling tasks where consistent performance and edge durability are critical.
Versatile Across Applications and Trades
This step drill bit is trusted by professionals in electrical work, HVAC, metal fabrication, and general maintenance. It's also a go-to for DIYers tackling home repairs or custom builds-perfect for drilling into control panels, enclosures, conduit knockouts, and more.
1. Ultra-Sharp HSS Cutting Edge for Fast Penetration
Engineered from premium high-speed steel (HSS), this bit delivers fast, clean entry through sheet metal and plastic. The precision-ground cutting edges reduce resistance and speed up the drilling process, producing smooth, burr-free holes with minimal effort-ideal for thin workpieces.
2. Self-Centering Split Point Tip for Accurate Starts
The split point design eliminates the need for center punching by automatically centering the bit on contact. It prevents walking on flat, curved, or hard surfaces, ensuring fast and accurate starts-critical for high-speed drilling on thin materials.
3. Spiral Flute Design for Quick Chip Removal
Each step features optimized flute geometry to evacuate chips efficiently and prevent heat buildup. This keeps the drilling surface cool, reduces jamming, and enhances cutting speed-ensuring consistent performance in rapid-throughput tasks.
4. Wear-Resistant Finish for Extended Tool Life
The drill bit is finished with a corrosion-resistant surface treatment (such as titanium coating), offering enhanced durability in environments exposed to moisture, metal debris, or cutting fluids. This helps maintain sharpness and structural integrity during extended use.
5. Multi-Size Step Profile for Maximum Efficiency
The multi-stage design allows users to drill various hole sizes with a single bit-reducing tool changes and maximizing productivity. Its balanced construction delivers smooth control during handheld or press-assisted drilling, especially useful for tasks involving electrical panels, HVAC ducting, and sheet metal fabrication.
1. Excellent Heat Resistance & Long-Lasting Sharpness
Crafted from high-quality high-speed steel (HSS), this step drill bit is built to endure the friction and heat generated during fast drilling. Its hardened structure resists wear and dulling, making it ideal for repeated use in thin stainless steel, aluminum, PVC, and other sheet materials.
2. Fast Multi-Diameter Drilling with Clean Results
Designed for high-efficiency work, each bit enables you to drill a variety of hole sizes without changing tools. The precision-machined steps ensure smooth, gradual cutting and deliver burr-free holes-eliminating the need for secondary cleanup, even on delicate or coated surfaces.
3. Versatile for Thin Materials in Any Industry
Whether you're working in electrical installation, HVAC, metal fabrication, or DIY home repairs, this step drill bit offers unmatched convenience and control. It's ideal for quickly drilling through control panels, junction boxes, thin enclosures, and plastic housings-making it a must-have for professionals and hobbyists alike.
1. CNC Precision Ground Geometry
Each step drill bit is CNC-machined to achieve consistent step heights, razor-sharp edges, and centered tips-ensuring fast, vibration-free drilling across thin metal sheets and plastic layers. The precise geometry minimizes walking and guarantees concentric holes from start to finish.
2. Vacuum Heat Treatment for Extreme Durability
To ensure optimal hardness and toughness, the HSS body undergoes vacuum heat treatment. This improves structural integrity and thermal stability, allowing reliable performance in demanding applications like stainless steel, aluminum, ABS, and PVC.
3. Ultra-Fine Polished Surface Finish
The bits feature an ultra-smooth polished surface that reduces heat, minimizes friction, and facilitates fast chip evacuation-especially beneficial during high-RPM drilling of soft thermoplastics and thin-walled metal sheets.
1. Advanced HSS Purification (EAF + LF + VD + RS ESR)
Made using ultra-clean high-speed steel, our step bits are refined through advanced metallurgical methods, enhancing purity and internal grain structure. This reduces brittleness and improves wear resistance-perfect for repetitive, high-speed drilling in layered or composite materials.
2. Optimized Hardness Through Thermal Processing
Quenching, cryogenic stabilization, and tempering combine to achieve hardness up to HRC 67-ideal for thin material applications that demand consistent edge retention without chipping or dulling.
3. RS ESR Edge Reinforcement
Our Rapid Solidification Electro-Slag Remelting technique delivers edge uniformity with enhanced carbide and cobalt distribution-key to maintaining sharpness under high thermal and mechanical load.
1. M35 HSS Core for Balanced Strength
Preferred for its optimal hardness-to-toughness ratio, M35 is our go-to steel for step bits targeting thin material applications. M2 and M42 options are also available for specific user needs.
2. Tailored Step Geometry & Coating Options
Customize flute designs, step counts, and helix angles to match application-specific requirements. Add coatings such as:
TiN for general-purpose use
TiAlN for high-temperature endurance
TiCN for extreme wear resistance
1. Multi-Step Flute Optimization
Carefully engineered flute profiles between steps ensure clean chip flow and thermal control during thin material drilling-preventing heat damage and clogging, even at high speeds.
2. Specialized Cutting Angles for Thin-Wall Penetration
Reduced axial force and fine step transitions help prevent deformation, cracking, or blowout in delicate plastics and soft metals-ideal for precision drilling tasks.
3. Application-Optimized Coatings for Demanding Conditions
Our high-performance coatings extend lifespan and reduce friction in repetitive, high-speed drilling across HVAC panels, control boxes, plastic housings, and thin-gauge sheet metal.
Q1: What makes this step drill bit different from regular twist drill bits?
A: Unlike standard twist drills that require separate bits for different hole sizes, this step drill bit features a conical stepped design. It allows you to drill multiple hole diameters with one tool, significantly improving efficiency. Made from high-speed steel (HSS), it offers superior heat and wear resistance-ideal for thin materials like sheet metal, plastic, and PVC.
Q2: What materials can this step drill bit be used on?
A: This bit is optimized for drilling into thin materials such as aluminum, mild steel, brass, stainless steel sheets, PVC, acrylic, and laminated plastic. It's commonly used in panel work, junction box modifications, plastic enclosures, and sheet metal fabrication.
Q3: Are different size ranges available for these step drill bits?
A: Yes. We offer a variety of step configurations including common ranges like 4-12mm, 4-20mm, and 4-32mm. Each step is clearly marked for precision. Custom sizes, flute designs, shank types (round, hex), and coatings (TiN, TiAlN) are also available for OEM/ODM needs.
Q4: Can this step drill bit be used with high-speed or handheld drills?
A: Absolutely. The HSS construction and optional surface treatments make this bit suitable for high-speed rotary drills, cordless drills, and drill presses. It resists heat buildup and stays sharp through continuous use-perfect for fast, repetitive drilling through thin materials.
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