Corona Rings Manufacturer
High-Voltage Efficiency
En tant que Leader corona ring manufacturer in North America, Alfiniti provides aluminum corona rings that minimize partial discharge and help safeguard high-voltage systems. Working from your supplied drawings and custom dimensions, our team delivers precision-fabricated solutions that extend component life, reduce downtime, and maintain electrical integrity.
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Corona Ring Specifications
| Product Name | Corona Rings / Aluminum Corona Rings |
| Corona Ring Raw Material |
Grade Aluminum Alloy 3A21 / 1060 / 6061 / 6063 |
| Matching Fasteners | ASTM 304 Stainless Steel or Hot Galvanized Steel |
| Surface Finish | Polishing Silvery Bright, Ra3.2 Roughness |
| Other Surface Treatment | Painting / Galvanizing / Coating Insulating Varnish |
| Tube Wall Thickness | 2.0mm – 10.0mm |
| OEM / ODM | Available per client’s requirements |
| Support Plate / Bracket | Aluminum, or per drawing specification |
| Inner Diameter | Depends on alloy and tube type |
| Outer Diameter | Maximum 5″ |
| Production Type | Pipe Bending / Machining / Punch Press Flattening |
| Packaging | Carton Box / Wooden Pallet / Wooden Case |
| Loading / Shipping | Winton, NC or Chicoutimi, QC |
Why Choose Alfiniti as Your Partner for Corona Ring Manufacturing?
Alfiniti combines flexible order sizes, in-house fabrication, specialized packaging, localized supply chain advantages, and cost-efficient processes to ensure your project is delivered exactly as you need it. Below, discover what sets us apart — and why partnering with us helps you stay on time, on budget, and on spec.
We Handle Large or (Very) Small Corona Ring Order Sizes
Small Batches or Large Runs—No Problem
Alfiniti stands out for its ability to handle both limited-quantity prototypes et la high-volume orders of corona rings. While many manufacturers focus only on massive runs, Alfiniti’s flexible production model can serve projects that require as few as five or six rings—or as many as several thousand. This adaptability means customers aren’t forced to order more than they need; they can scale up as their demand grows or simply test new designs without feeling locked into oversized commitments.
Smooth Transition from Pilot to Full Production
Customers often want to start small—perhaps to validate performance or conduct in-field testing before committing to a larger order. Alfiniti’s production process is designed to make that leap from limited batches to full-scale manufacturing seamless. By having the raw materials and tooling under one roof, they can quickly ramp up capacity while maintaining tight quality control at every stage.
With 60+ years under our belt, we have an extensive tooling library that allows us to offer small runs at great prices. See more about tooling below.
Tailored Lead Times & Personalized Support
Whether you need a quick turnaround on a modest batch or a precisely scheduled delivery for thousands of rings, Alfiniti’s team works to align with your timeline. Their service approach includes personalized communication and transparent project updates, ensuring you always know where things stand. With flexible order sizes, you get the parts you need—when you need them—without sacrificing quality or efficiency.
Let Our Tooling Save You Money
Skip Custom Fees
Over 60 years in business, we’ve assembled a broad range of open tooling to cover most shapes and sizes. That means no new mold costs, no waiting for custom setups, and ultimately, a faster path from concept to production.
Faster Production, Less Downtime
In most cases, we can skip creating brand-new tooling altogether. That means we can deliver faster production and less downtime while maintaining consistent quality standards for each batch of corona rings.
Key Advantages:
- No Custom Tooling Fees
- Shorter Setup Time
- Lower Overall Costs
- Reliable Quality Control
In-House … Everything
We Source and Supply Your Aluminum
Because we are integrated with the supply chain, we can handle purchasing the aluminum ourselves. By keeping every stage of material sourcing under one roof, we eliminate extra markups and maintain consistent quality, so you can expect predictable lead times and a more streamlined supply chain.
We Perform Every Fabrication Step In-House
From bending and flattening to CNC machining, welding, and sandblasting, we manage your entire production sequence onsite. By avoiding outside contractors, we maintain uniform quality standards and reduce scheduling delays—giving you faster, more reliable delivery.
Packaging & Shipping: Logistics Are Covered
We tailor packaging and shipping to each project, offering a variety of options—wire-bound crates, Gaylord boxes, and pallets—to protect every ring from departure to arrival. Because we operate facilities in Winton, NC, and Chicoutimi, QC, we can reach U.S. and Canadian destinations using cost-effective routes and dependable carriers.
Every step — from raw aluminum to final finish — happens in-house, giving you tighter control, faster delivery, and consistent quality.
Alfiniti’s Key Advantages:
- Single-Source Aluminum
- All Fabrication Onsite
- Extensive Tooling Library
- Faster Turnarounds
- Unified QA
Localized Supply Chain
We Keep Production Close to You
Alfiniti operates two facilities—one in Winton, North Carolina, and another in Chicoutimi, Quebec—so your orders originate on the same continent where they’re delivered. You benefit from shorter transit routes, fewer handling transfers, and direct communication throughout the process.
We Speed Up Delivery and Customs
By managing shipping across the U.S.-Canada border firsthand, we minimize paperwork delays and unexpected fees. Whether you’re ordering a short run or a thousand-piece project, our local approach cuts down on complications and gives you clearer timelines.
Key Advantages:
- Shorter lead times
- Minimal import hurdles
- Stable pricing
- Easier communication
- Greater reliability
We Keep Costs Under Control
No Extra Markups or Outside Vendors
By handling everything internally (aluminum sourcing, fabrication, and finishing), Alfiniti prevents the chain of markups common in outsourced production. You avoid hidden fees, and we streamline every step, so your overall project cost stays competitive without sacrificing quality or delivery speed.
Key Advantages:
- Fewer Vendor Markups
- Single-Source Efficiency
- Streamlined Workflow
- Predictable Budgets
What Are Corona Rings?
Corona rings are circular metal fittings that help reduce unwanted corona discharge—a leakage of electric current into the air near high-voltage conductors. By creating a smoother, rounded geometry around sharp edges or connection points, they lower the local electric field below the threshold at which the air becomes ionized. Since corona discharge can lead to energy loss, ozone production, and damage to insulators, a well-placed corona ring significantly improves the long-term reliability of high-voltage equipment. While rings are sometimes fabricated from various conductive metals, aluminum is a popular choice for its corrosion resistance and favorable strength-to-weight ratio.
Industries and Applications for Corona Rings
Whether you’re in renewable energy, automotive R&D, or managing a large-scale substation project, aluminum corona rings help stabilize system voltages and reduce failures. Alfiniti’s rings are used in:
- Transmission lines and substation insulators
- High-voltage switchgear and transformers
- Renewable energy systems (wind, solar)
- Electric vehicle charging stations
- Large-scale test laboratories
- OEM electrical equipment manufacturing