Why Transformer Efficiency Starts with Uniform CRGO Lamination

In power transformers, the magnetic core is responsible for guiding and concentrating magnetic flux between the windings. This core is constructed using stacked Cold Rolled Grain Oriented (CRGO) steel laminations, each slit and cut with precision. Even the smallest inconsistencies in lamination dimensions, angles, or finish can cause:

• Magnetic flux leakage
• Increased no-load and eddy current losses
• Audible hum and vibration
• Uneven core stacking
• Reduced operational efficiency and lifespan

In today’s performance-driven power sector, transformer OEMs cannot afford such inefficiencies. That’s why lamination consistency isn’t a feature it’s a requirement.

At Sarjani Coretech, consistency is engineered into every slit, cut, and dispatch. Here’s how our process guarantees uniform transformer core laminations that drive real-world performance.

1. Slitting CRGO Coils to Tight Tolerances

The first step in transformer lamination is slitting the wide CRGO mother coils into narrow-width strips. This stage determines how uniform and stackable the final laminations will be.

At Sarjani, our high-speed slitting lines are designed for:

• ±0.1 mm width accuracy
• Clean, burr-free edges
• Minimal camber and edge deformation

Every slit coil is logged, inspected, and batch-traced to ensure dimensional integrity and core-ready finish.

2. Precision Cutting for Straight and Mitred Laminations

Based on transformer design, laminations may be cut as straight lengths or at mitred angles to reduce corner flux leakage and improve magnetic flow.

Sarjani offers:

• Automated mitred cutting with high angular precision
• Straight cuts with consistent length and edge finish
• CNC-controlled shearing for repeatable accuracy

No blade offsets. No angle mismatches. Just clean, consistent laminations ready for core stacking.

3. Consistency Across Every Batch

OEMs operating across multiple production lines or staggered delivery schedules require dimensional uniformity across batches.

Sarjani delivers:

• Batch-to-batch consistency with calibrated machines
• Pre-dispatch inspections for critical dimensions
• Documentation with coil origin, slit size, cut angle, and inspection records

Whether you need 500 cores or 5,000, Sarjani ensures the first cut and the last are identical.

4. Fewer Rejections. Faster Assembly.

Inconsistent laminations result in:

• Stack height variation
• Core assembly delays
• Manual correction and wastage

Sarjani’s consistently cut laminations mean:

• Faster core stacking
• Better stacking factor
• Reduced assembly rework and downtime

Our quality translates directly into lower labour costs and shorter production cycles at your end.

5. Packaged for Efficiency and Protection

We know that even a perfectly cut lamination is of no use if damaged in transit. That’s why Sarjani ensures packaging that supports quality:

• Eye-to-sky or eye-to-wall formats
• Core bundles stacked and secured
• Wooden pallets or core trays on request

Each dispatch is optimized for assembly-line readiness, ensuring minimal material handling time.

Why It All Comes Down to Consistency
Laminations that don’t match = Cores that don’t align = Transformers that don’t perform.

At Sarjani Coretech, every coil is transformed into performance-ready laminations through a process built on precision, verification, and control. Our commitment to consistency ensures:

• Lower core losses
• Longer transformer life
• OEM production efficiency

Need Laminations That Match Every Time?
We make cores work by making laminations right.

📞 Call 88497 34884 to place your order or request a quote.