| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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This high-speed steel (HSS) multi-layer step drill bit is engineered for electricians and professionals who frequently work with metal and plastic enclosures. Ideal for materials such as stainless steel panels, aluminum boxes, mild steel sheets, and PVC or ABS plastics, it enables clean, burr-free holes for switches, conduit entries, and control components.
The stepped design allows for precise, incremental hole enlargement without changing bits-perfect for drilling multiple conduit hole sizes or routing entries on metal-clad panels. Each step is CNC-machined and integrates a deburring edge, producing clean, finished holes in a single pass.
Made from premium HSS and subjected to vacuum heat treatment, the bit offers high thermal stability and wear resistance. It stays sharp during continuous use, even when drilling layered steel panels or galvanized enclosures, common in electrical and HVAC installations.
From junction boxes to distribution cabinets, this drill bit simplifies common electrician tasks by combining multi-size drilling, deburring, and smooth chip removal. Its universal shank fits handheld drills and drill presses, making it equally effective in fieldwork or workshop settings.
Crafted from industrial-grade high-speed steel (HSS), this step drill bit features razor-sharp, CNC-ground cutting edges optimized for drilling through layered materials like galvanized steel, aluminum, and PVC commonly found in electrical cabinets and conduit boxes. Clean entry and minimal burr formation ensure professional-grade hole finishes every time.
The split point tip eliminates walking on curved or painted metal surfaces-perfect for electricians drilling into enclosure panels, breaker boxes, or control boards without needing a center punch. It allows quick, accurate starts even on sloped or vertical surfaces.
The spiral flute design ensures rapid chip clearance, preventing clogging when drilling through multi-layer sheet metal or composite materials. This keeps the cutting surface cooler and reduces stress on the bit during extended use-ideal for jobsite work where multiple panel penetrations are required.
Finished with a corrosion-resistant polish or coating (e.g., TiN or TiAlN), this bit withstands exposure to humidity, lubricants, and field abrasion, making it highly suitable for use in electrical system installations, HVAC retrofits, and control cabinet fabrication.
Designed for step-by-step hole enlargement, each stage is clearly laser-engraved with size markings-allowing quick diameter selection for EMT conduit knockouts, switch gear installations, or terminal pass-throughs. This reduces tool changes, improving efficiency on the job.
Crafted from premium high-speed steel (HSS) and engineered for multi-layer drilling, this bit delivers excellent thermal and wear resistance under continuous use. It maintains sharpness and edge integrity when drilling through metallic enclosures, electrical panels, stainless steel junction boxes, and PVC conduits-ideal for busy electricians working in demanding environments.
The stepped cone design allows electricians to drill multiple hole sizes with one single tool, eliminating the need for frequent bit changes. Each step transitions smoothly, producing clean, round holes with minimal burrs in both metal and plastic-perfect for conduit knockouts, control box modifications, and switchboard wiring entries.
Whether you're installing circuit breakers, running EMT conduits, or fabricating control cabinets, this multi-layer step drill bit is built for precision, speed, and convenience. It performs reliably on galvanized sheet metal, aluminum panels, brass terminals, and ABS enclosures, making it a go-to tool for field electricians and shop technicians alike.
Our electrician-grade HSS step drill bits are manufactured with CNC precision grinding, ensuring consistent step height accuracy, concentric tip alignment, and razor-sharp cutting edges. This guarantees clean, precisely sized holes across multi-layer sheet metal or plastic panels often found in switchboards, junction boxes, and conduit panels.
Each bit is vacuum heat-treated to boost surface hardness and internal toughness, withstanding the high friction and heat typically encountered when electricians drill galvanized steel panels, stainless steel doors, or PVC covers. This enhances reliability for continuous jobsite use.
The bits undergo ultra-fine surface polishing to reduce cutting resistance and promote fast chip evacuation, especially critical when drilling through laminated control panels or layered enclosure assemblies without delamination or burn marks.
Crafted from ultra-clean M35 high-speed steel, refined using EAF + LF + VD + RS ESR processes, these drill bits feature superior structural purity. Uniformly distributed carbides provide excellent wear resistance and toughness, ensuring stable cutting in multi-material panel structures such as stainless + aluminum or steel + plastic combinations.
Each bit is treated with quenching + cryogenic cooling + tempering, resulting in hardness up to HRC 67, optimized for high-RPM cordless drills. This ensures minimal dulling or tip chipping-even when repeatedly punching knockout holes in electrical enclosures.
Flutes between steps are optimized to prevent chip buildup, which is especially helpful when drilling coated electrical panels or laminated PVC/ABS walls. Clean chip ejection improves tool life and reduces motor load on cordless drills.
The step transitions and tip geometry allow for walk-free starts, clean entry, and automatic deburring, eliminating the need for secondary finishing major time-saver when working on live-site upgrades or large-scale panel retrofits.
Optional coatings such as:
TiAlN: ideal for high-speed stainless steel penetration
TiCN: excellent for abrasive panels and repeat-use in dusty worksites
Available with laser-marked size steps, hex or tri-flat shanks, and custom flute angles to match the needs of modern electrical toolkits. Compatible with cordless, corded, and bench-mounted drills.
Q1: What makes this multi-layer step drill bit ideal for electricians?
A: Unlike standard drill bits, this multi-layer step drill bit is engineered for electrical professionals who frequently work with control panels, metal enclosures, and distribution boxes. Its stepped design allows for multiple hole diameters with one tool, and the precision-ground cutting edges ensure clean, burr-free holes in layered materials like sheet metal and plastic. It's especially useful when installing conduit, switches, or cable entry ports.
Q2: What materials can this step drill bit handle effectively?
A: This bit is built from premium high-speed steel (HSS) and heat-treated for extra durability, making it ideal for drilling through stainless steel, galvanized steel, mild steel, aluminum, PVC, and ABS. It performs exceptionally well when used on multi-layer composite panels common in electrical and HVAC installations.
Q3: Are there different step sizes and configurations available?
A: Yes. We offer a variety of step combinations, typically ranging from 4mm to 40mm, to cover the most common hole sizes used by electricians. We also support OEM/ODM customization, including laser-engraved size markings, non-standard step geometries, hex or tri-flat shanks, and application-specific surface coatings such as TiN or TiAlN for enhanced performance.
Q4: Is this step drill bit compatible with cordless and handheld drills?
A: Absolutely. This step drill bit features a universal hex shank, making it compatible with cordless power drills, electric hand drills, and drill presses. It's optimized for high-speed, high-efficiency drilling, ensuring excellent control and minimal vibration even during prolonged use on the jobsite.
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