| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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Wide Industrial Application
This professional-grade step drill bit is engineered from high-speed steel (HSS) to meet the demands of industrial environments. It delivers exceptional performance when drilling both metal and plastic, making it ideal for materials such as aluminum, brass, mild steel, PVC, and acrylic. One tool covers a range of hole sizes, ensuring clean, burr-free results and reduced tool changes on the production floor.
Multi-Diameter Drilling with Integrated Deburring
Designed with precision-machined steps, this drill bit allows seamless transitions between hole sizes without the need to swap bits. Each step includes a deburring feature, producing smooth, clean holes and reducing the need for additional finishing-perfect for high-throughput, time-sensitive operations.
Advanced Thermal Treatment for Extended Life
Manufactured from premium HSS and heat-treated to industrial standards, this bit offers superior edge retention and thermal stability. It resists wear, dulling, and deformation under continuous high-speed, high-temperature use-ideal for demanding metalworking applications.
Built for Cross-Sector Professional Use
From electrical and HVAC installations to heavy-duty fabrication and precision sheet metal work, this step drill bit is trusted across industries. Its ability to deliver accurate, repeatable holes in both metal and plastic makes it a go-to tool for professional technicians, machinists, and fabrication specialists.
1. Precision-Ground, Industrial-Grade Cutting Edges
Crafted from premium high-speed steel (HSS), each bit features razor-sharp, CNC-ground cutting edges designed for high-efficiency penetration into industrial metals and engineering plastics. The sharp geometry reduces cutting resistance, delivers clean hole edges, and minimizes burring-ideal for high-volume fabrication environments.
2. Self-Centering Split Point for Accurate Starts
Equipped with an anti-walk split point tip, the bit enables precise, stable starting without the need for a center punch. This ensures consistent accuracy even on curved or hardened metal surfaces-critical in electrical panel installations, sheet metal work, and automated production setups.
3. Step-by-Step Chip Evacuation with Spiral Flute Design
Engineered for optimal chip clearance, the spiral flute design efficiently removes metal and plastic shavings at each step. This prevents clogging, reduces heat buildup, and ensures a smooth drilling cycle-extending tool life and reducing machine downtime in industrial workflows.
4. Corrosion-Resistant and Wear-Protective Finish
Each bit is finished with a polished or advanced coating (such as titanium nitride, if applicable), delivering excellent resistance to oxidation, wear, and harsh environments. This makes the drill bit highly suitable for industrial conditions where exposure to coolant, moisture, or cutting fluids is frequent.
5. Multi-Diameter Efficiency in a Balanced Design
The stepped geometry allows multiple hole sizes to be drilled with a single tool, minimizing bit changes and improving production throughput. The bit's balanced design ensures stability and control, making it ideal for repetitive drilling in control cabinets, junction boxes, automotive panels, and precision metal fabrication tasks.
1. Exceptional Wear Resistance & Thermal Stability
Engineered from premium high-speed steel (HSS), this industrial-grade step drill bit is built to perform under the extreme heat and friction typical in high-speed metal and plastic drilling. Its hardened structure ensures long-lasting sharpness and dimensional accuracy, even during repeated use on tough materials like stainless steel, aluminum, and engineering-grade plastics.
2. Multi-Diameter Drilling with Precision Finish
Designed for efficiency and accuracy, this bit allows users to drill multiple hole sizes with a single tool-reducing downtime and boosting productivity in demanding environments. The stepped geometry supports gradual hole enlargement while producing clean, burr-free results on metal and plastic, minimizing the need for additional finishing or rework.
3. Industrial-Ready Performance Across Applications
Trusted by electricians, fabricators, maintenance teams, and HVAC professionals, this step drill bit is a versatile tool for industrial tasks such as control panel modification, cable routing, junction box installation, and enclosure fabrication. Its precise cutting control and rugged construction deliver consistent, professional results across a wide range of industrial and manufacturing scenarios.
1. CNC Precision Grinding
Each professional-grade step drill bit is CNC-ground to ensure consistent step heights, razor-sharp cutting edges, and accurately centered tips. This precision ensures clean, stable drilling across a wide range of diameters in sheet metal, thermoplastics, and composite panels-with reduced vibration and increased operational control.
2. Vacuum Heat Treatment
To achieve industrial durability, every bit undergoes vacuum heat treatment. This enhances surface hardness and internal core toughness, providing exceptional wear resistance and thermal endurance-essential when drilling through stainless steel, aluminum, ABS, and PVC in high-load, high-speed applications.
3. Ultra-Fine Polishing
A mirror-polished flute surface minimizes friction, promotes smooth chip evacuation, and significantly reduces heat buildup during prolonged drilling. This not only extends tool life but also protects delicate surfaces from scoring or thermal distortion, particularly in soft metals or plastics.
1. High-Purity HSS from EAF + LF + VD + RS ESR
Our step drill bits are produced using advanced steel refinement technologies: Electric Arc Furnace (EAF), Ladle Refining (LF), Vacuum Degassing (VD), and Electro-Slag Remelting (RS ESR). These processes reduce impurities and enhance structural consistency-resulting in a drill bit with superior strength, toughness, and longevity for demanding industrial applications.
2. Integrated Thermal Treatment - Up to HRC 67
A combination of quenching, cryogenic treatment, and precision tempering boosts hardness up to HRC 67 while preserving ductility. This balance ensures resistance to chipping, cracking, and fatigue under intense conditions typical in electrical cabinet fabrication, automotive panel work, and heavy-duty production lines.
3. RS ESR Edge Reinforcement
Rapid Solidification ESR technology enhances the bit's cutting edge with finely distributed carbides and cobalt, maximizing edge retention and wear resistance. The result: sustained performance in high-temperature, high-pressure, and abrasive drilling conditions.
1. Preferred Material Configuration - M35 HSS Core
While M2 and M42 versions are available, we prioritize M35 for its excellent wear resistance and hardness-to-toughness ratio-ideal for users drilling through both ferrous metals and reinforced plastics under industrial duty cycles.
2. Custom Step Geometry and Advanced Coatings
We provide customizable step spacing, flute lengths, and helix angles for application-specific performance. Optional high-performance coatings include:
TiN - for general-purpose wear resistance
TiAlN - for high-temperature resistance in dry or fast drilling
TiCN - for abrasive environments with tough surface materials
1. Multi-Step Flute Geometry
Each flute is precisely engineered to promote thermal control and efficient chip ejection between steps. This reduces clogging, ensures smoother cutting, and maintains consistent feed rates-even at high RPMs in industrial machinery.
2. Tuned Cutting Angles for Material Integrity
The step transitions and cutting tip are designed to reduce axial load, prevent material tearing, and preserve surface integrity-critical when drilling soft, layered metals or thin-walled thermoplastics.
3. Performance-Tailored Coatings
Choose application-specific coatings like TiAlN for heat-intensive operations or TiCN for extreme durability. These coatings extend the bit's service life and enable consistent, clean multi-size drilling under demanding factory or field conditions.
Q1: What makes a professional-grade HSS step drill bit different from regular drill bits?
A: Unlike standard twist drill bits that are limited to a single hole size, professional-grade step drill bits feature a conical, multi-step design that allows users to drill multiple hole diameters with a single tool. Made from industrial-grade high-speed steel (HSS), they offer superior heat resistance, wear resistance, and edge retention-ideal for demanding, high-speed metalworking environments. Their design also allows for clean, burr-free holes and integrated deburring at each step.
Q2: What materials can this step drill bit be used on?
A: This step drill bit is engineered for thin to medium-gauge materials, including stainless steel, mild steel, galvanized steel, aluminum, copper, brass, PVC, acrylic, and other engineering plastics. It's commonly used in electrical panel fabrication, HVAC installation, automotive sheet metal work, and general industrial metalworking.
Q3: Are different step sizes or configurations available?
A: Yes. Our professional-grade step drill bits are available in a range of step configurations (e.g., 4-12mm, 4-20mm, 4-32mm, etc.) and are laser-etched for accurate diameter identification. We also support custom options including special step spacing, flute geometry, shank types (round, hex, or tri-flat), and PVD coatings like TiN, TiAlN, or TiCN for enhanced performance.
Q4: Can these step drill bits be used for high-speed or industrial drilling applications?
A: Absolutely. These HSS step drill bits are heat-treated and precisely balanced for high-speed and high-load industrial drilling. They are compatible with handheld drills, cordless tools, and drill presses. Their optimized cutting geometry ensures stable performance, reduced vibration, and long service life-even in continuous production or heavy-duty use cases.
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