Metalink Electromechanical (Wuxi) Co., Ltd :
Cut-Cores/C Cores Manufacturer
Precision‑split cores for transformers, reactors & sensors
Manufactured from CRGO silicon steel, CRNGO steel, amorphous or nanocrystalline strips. Continuously wound, stress‑relief annealed, and precision cut for easy assembly onto pre‑wound coils.
Perfect Product System of Cut Cores
Since 2000, Metalink has been at the forefront of manufacturing high-performance iron cores and specialized processing solutions for global industries. With state-of-the-art facilities in China and decades of expertise, we specialize in:
Cut cores
Powder coating
Custom sizes
Serving clients across 50+ countries, we combine cutting-edge technology with Chinese manufacturing excellence to deliver reliable, cost-effective solutions that power industries worldwide.
Easy Assembly
Split‑open structure allows quick fitting onto pre‑wound coils. No manual winding required — saves labor and time.
Low Core Loss & Low Noise
Continuously wound magnetic path outperforms EI laminations. Step‑Lap option minimizes joint reluctance.
Controllable Air Gap
Zero‑gap, fixed‑gap, and adjustable‑gap versions for precise saturation control in transformers & reactors.
Full Customization
Dimensions, material, cross‑section, coating, and tolerance all tailored to your drawings. Small‑batch & mass orders.
——Product Types Of Cut Core
- Choose from our standard series, or let us design a custom shape for your application.
C Core
Split into two halves for pair‑set usage. Rectangular cross‑section, short magnetic path. Mainly for reactors, inverter transformers & power inductors.
CD Core
Combination of large & small C‑cores with large window area. Ideal for high‑power power‑frequency transformers, UPS and heavy‑duty reactors.
Rectangular Cut Core
Single‑split rectangular frame with flexible dimensions. Widely used in current transformers, instrument transformers and energy‑harvesting units.
Toroidal Cut Core
Radially split toroidal core, compact size. Designed for split‑core CTs, clamp‑on meters and magnetic sensors.
ED Core
E+D combined cut‑core structure for small single‑phase / three‑phase drive transformers & SMPS.
Step‑Lap Cut Core
Step‑Lap cut‑cores are available with staggered‑layer joints for lower loss & noise. Custom oval / special cross‑section shapes are acceptable.
——Material Option for Cut Core
| Type | Material | Typical Thickness | Main Application |
|---|---|---|---|
| Grain-oriented Silicon Steel Cut Core | Grain‑Oriented Silicon Steel (CRGO) | 0.23 / 0.27 / 0.30 / 0.35 mm | Power‑frequency transformers, CTs, reactors (the industry standard) |
| CRNGO Cut Core | Non‑Grain‑Oriented Silicon Steel | 0.35 – 0.50 mm | High‑frequency inductors, rotating machinery |
| Amorphous C Cutting Core | Iron‑Based Amorphous | 0.025 mm | Energy‑saving inverters, PV systems, low‑loss reactors |
| Nanocrystalline Cut Core | Nanocrystalline Alloy | 0.02 – 0.03 mm | High‑frequency CTs, small‑signal sensors, EMI filters |
——Surface Treatment
- Protect your core and ensure reliable insulation with our surface finishing options.
Bare Core
As‑annealed, cut surfaces exposed. Customers apply own insulation.
Epoxy Powder Coating
Insulating, anti‑rust, durable — recommended option for most applications.
Fiberglass Tape Wrapping
High‑strength insulation for harsh environments or high‑voltage applications.
——Air‑gap Options
- Control saturation and inductance with our flexible air‑gap solutions.
1. Zero Air‑gap
Tight butt‑joint for maximum permeability. Ideal for transformers and voltage transformers.
2. Fixed Air‑gap
Built‑in insulating spacer to prevent magnetic saturation. The default choice for reactors and chokes.
3. Adjustable Air‑gap
Spacers can be added or removed in the field. Perfect for test equipment and variable reactors.
——Video of Cut Core
Advantage
Committed To 100% Customer Satisfaction
Thinking and solving problems from the customer’s point of view
Trust and Worth
Our Partners
Our Shows
SMART ENERGY
Tokyo, JP
POWER EXPO
Atakent, KZ
ENERGY NEXT
Sydney, AU
ELECTRIC & POWER
Ho Chi Minh, VN
What Our Clients Say
Testimonials
Distributor
Spriha Baid
"My customers require a variety of transformer cores, and Metalink's one-stop service always allows me to respond to customers quickly."
Manufacturing Plant Manager
Sushant Shekhar
“METALINK’s cut‑cores cut our assembly time in half and lowered core loss by over 10%. The step‑lap joint is a game‑changer for noise reduction.”
European Transformer OEM
Slivina
“They delivered a custom rectangular cut‑core with a specific air gap in just 10 days. Perfect fit, great price, and they accept small batches – rare in this market.”
Power Grid Engineer
Anastasiia
“We rely on METALINK for high‑frequency nanocrystalline cut‑cores. Their tolerance control is excellent, test reports are complete, and they even process our own materials.”
Request a Quote
Send us your drawing, key specifications— we’ll respond with a competitive quotation within 12 hours.
Learn More From
Frequently Asked Questions
7-15 days to produce cut cores.
Cut cores are packed in standard export packaging: polyethylene film, cartons, and fumigated wooden pallets. Custom packaging is also available.
Current Transformers & Split‑core CT
Power‑frequency / Inverter Transformers, UPS
Reactors & Filter Inductors
Instrument Transformers, Energy‑harvesting Devices
PV, Energy Storage, Industrial Power Supply, Railway Transportation
- Power Transformer Core
- Electronic Transformer Core
- Reactor Core / Inductor Core / Choke Core
- Instrument Transformer Core (CT: Current Transformer / PT:Potential Transformer)
- Sensor Core / Clamp Meter Core