Metalink Electromechanical (Wuxi) Co., Ltd :
CRGO Lamination Core For Transformer & Reactor
We work from your drawings, processing parameters including Diameter, HW, Centre Leg, Yoke Holes, Leg Holes with a stacking factor above 0.97. Burr control under 0.03mm.
Lamination Cut Cores (Stacking Cores)
A stacking core, also widely known as a lamination core, is the most universal magnetic core structure.
It usually uses CRGO or CRNGO silicon steel strips punched into specific shapes, stacked to a designed thickness, and secured by clamps or bolts. The nearly invisible insulation coating on each lamination blocks eddy currents, minimizing losses. In addition, amorphous and nanocrystalline cores(nano cores) can also be customized.
The lamination core of transformer or reactor is the heart of a compact, efficient reactor, and we ensure it beats strong with low loss and low noise.
Precision Manufacturing
Slitting machine & cut to length machine with automated servo-feeding presses control burrs within 0.03mm.
Superior Materials
Mill-certified Baosteel, Wisco, Shougang CRGO. International grades: B23R085, M-OH, M3, M4T27, etc.
End-to-End Quality
Nitrogen-atmosphere annealing ±5°C, followed by Vacuum Pressure Impregnation (VPI).
Global Logistics
ISPM 15-compliant fumigation-free wooden cases with bilingual documentation.
—Customized to Your Drawing Of Transformer & Reactor Core
Custom Stacking Core / Lamination Core
A stacking core (also called a lamination core) is the most universal magnetic core structure. We manufacture from your drawings, processing CRGO (e.g., 27QEL120, M4T27) or CRNGO (e.g., 25CS1250HF) silicon steel strips or Amorphour(1K101/2605-S2 / 2605SA1) or Nanocrystalline(1K107/FINEMET®) into precise shapes, stacked to your specified thickness, and secured by clamps or bolts. The nearly invisible insulation coating on each lamination blocks eddy currents, minimizing losses.
——Technical Specifications & Drawing Parameters
We manufacture directly from your drawings. Key parameters we process include:
Drawing Requirements | Specifications |
|---|---|
Core Diameter | e.g., 140 mm (customizable) |
HW (Window Height) | e.g., 300 mm(customizable) |
Centre Leg | e.g., 285 mm(customizable) |
W Max / H Max / L Max | e.g., 140 × 580 × 710 mm(customizable) |
Yoke Holes | e.g., Φ7.3 mm (customizable) |
Leg Holes | e.g., Φ7.3 mm (customizable) |
Stack Thickness | e.g., 112 mm, 134 mm, 145 mm, 160 mm |
Step-Lap / 45° Assembled Core | Step-lap type, 5-step configurations available |
V-Notch & Progressive Punching | Progressive punching with V-notch depth tolerance -0.0/+0.4 mm |
Butt Joints Removed | Available as an option for reduced losses |
Weight Range | From 20 kg to 20000 kg per set (customizable) |
——Low-Loss Iron Cores For Transformers
Precision Slitting Manufacturing
Slitting and cutting to exact customer transformer and reactor core dimensions ensure burr-free laminations, directly contributing to lower core loss.
Custom Clamp Production
Produced in our own facility to your fixture drawings, using carbon steel, stainless steel, or other materials, with color customization available.
Lamination Core Assembly
Assembly of LV-TOP Channel, LV-BOTTOM Channel, HV-TOP Channel, HV-BOTTOM Channel, and Bottom Foot Plate per customer drawings.
——CRGO Materials & The 9-Step Journey Of Silicon Steel Core
Silicon Steel Grades We Offer
Please rest assured:
Type | China Grades | Common Grade |
|---|---|---|
CRGO | B23R085, B23R090, 27QEL120, etc. | M-OH, M-1H, M-2H, M3, M4, M4T27, MOHT23 |
CRNGO | 50W470, 50W600, 35W300, 25CS1250HF,etc. | W300,W470, W600 |
All electrical materials undergo incoming re-inspection for B50, P1.7/50, P1.5/50,P1.7/60, P1.5/60 and coating adhesion.
9-Step Manufacturing Process of transformer stacking core
9-Step Manufacturing Excellence
——Key Applications of Transformer Core
Oil-Immersed Transformer
Full-range international oil-immersed transformers from 30kVA to 1000+MVA, models S11 to SSZ, compliant with IEC/ANSI standards.All are manufacturable by Metalink with customized voltage ratings.
Dry Type Transformer
Full-range international dry-type transformers from 30kVA to 12.5MVA, models SCB10 to SCB18, compliant with IEC/ANSI standards.
All are manufacturable by Metalink with customized voltage ratings and insulation levels.
Reactor
Full-range international reactors, including shunt, series, filtering, and current-limiting types, from 5kvar to 300Mvar, with voltage ratings from 0.4kV up to 800kV, compliant with IEC 60076‑6 and ANSI/IEEE standards.
——Custom Projects of Lamination Core:
From Drawing to Delivery
6-Step Customization
Committed To 100% Customer Satisfaction
1.Magnetic Core Requirement Review
2.Electromagnetic Design & Simulation
3.Joint Design Review
4.Sample Production of Iron Core (3-5 working days)
5.Client Validation
6.Mass Production with Engineer Oversight
We Follow Best Rules
Every crate includes:
- Factory Test Report
- Certificate of Conformance
- Packing List
- Operating Manual (Bilingual)
——Enhanced Packaging Protection of Transformer Iron Core
Don't worry about long sea voyages
Anti-compression and anti-shock: high-strength winding film (pre-stretching rate ≥300%) + Wooden Case
+20’Container, and are rust and moisture-proof.
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
"The automated slitting lines and maintenance training programs from your team transformed our production line. Downtime reduced by 30%, and our team is more skilled than ever!"
European Transformer OEM
Slivina
"Their CRGO coils reduced our core loss by 25%, and their ISO-certified logistics ensured on-time delivery every time. This partnership has been a game-changer for our renewable energy projects."
Power Grid Engineer
Anastasiia
"Your IEC 60404-8 certified silicon steel coils met the strict standards of our utility grid. The data sheets and compliance reports were a breeze to integrate into our procurement process."
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Learn More From
Frequently Asked Questions
Our Crgo mother coils are in stock and ready to ship. Crgo slit coils take 3-5 days to process.
High-frequency transformers → M4/M5 preferred (low loss at high frequencies)
Giant power transformers → M3 grade is preferred (optimal cost-effectiveness)
Aerospace equipment → Hi-B grade recommended (fatigue resistance increased by 50%)
Laser-treated CRGO oriented silicon steel reduces iron loss and improves magnetic domain refinement for higher efficiency, while non-laser versions have larger magnetic domains and higher energy losses.