SREE Electrical Equipment

Transformer Core Cutting, Slitting & Stacking Lines

For transformer cores

SREE designs and manufactures complete slitting & cut to length lines for transformer cores. Our lines combine high precision, high speed and practical automation to help you upgrade core manufacturing with confidence.

Configure Your Line

Trusted by the World's Leading Brands

About SREE

Precision Manufacturing
Evolving Since 1997

Rooted in China’s manufacturing ecosystem and serving global markets, SREE develops high-performance silicon steel processing equipment for demanding industrial applications.

By combining in-house engineering, automation expertise and system integration capability, we deliver production lines that compete on performance, reliability and long-term cost.
Learn MoreContact Us
About SREE

From Coil to Core Turnkey Iron‑Core Automation

We build production systems that help transformer and motor manufacturers make iron cores with consistent quality at scale.

By combining process engineering, automation, and line integration, we reduce manual dependence and make performance repeatable—shift after shift, product after product.

The goal is simple: higher OEE, lower variability, and a line you can trust.

SRJD400-224G CRGO core lamination and cutting line - view 6

Built by machine builders - since 1997

We machine our own line beds in a 26,000 m² works, hold 153 granted patents, and have delivered complete core workshops for transformer makers across China, Kazakhstan, Kyrgyzstan and Russia.

1997
Founded
153
Patents granted
26,000 m²
Manufacturing base
60+
Machine tools in-house
300+
Lines delivered
100+
Customer plants

Product Lines

High-Speed Cut-to-Length Line
High-Speed Cut-to-Length Line

Synchronised cutting - the strip never stops. High volume, frequent changeovers.

Standard Cut-to-Length Line
Standard Cut-to-Length Line

Step-by-step cutting, built to last. Steady batches, proven export model.

Slitting Line
Slitting Line

Coils into strips under controlled tension, servo blade-width adjustment.

Cutting-Stacking Machine
Cutting-Stacking Machine

Cut, collate, stack - one machine. Two cores at once.

Stacking Line
Stacking Line

Robot stacking up to 42 laminations/min. Twin-station and 5+5 builds.

Shop Logistics
Shop Logistics

Oil-filling, testing, turnover tables and RGV transfer.

Stereoscopic Warehouse
Stereoscopic Warehouse

Coil and lamination storage with crane feeding to the line.

About SREE

Explore Our Popular Projects

SRHJ400-223C

Transformer-core cut-to-length line with upper & lower log stacking arms. The upper arm stacks 2 logs and the lower arm stacks 3 logs, forming 5 logs (2 yokes, 2 side legs, 1 center leg) for a complete core lamination in one assignment.

Silicon Steel Sheet Cut-To-Length Line SRHJ400-223C

View series & specs
Silicon Steel Sheet Cut-To-Length Line SRHJ400-223C
SRHJ400-223G

High-speed silicon steel sheet cut-to-length line for transformer cores, integrating shearing, V-notching, hole punching and pre-stacking. Designed for high precision and stable high-throughput production.

Silicon Steel Sheet Cut-To-Length Line SRHJ400-223G

View series & specs
Silicon Steel Sheet Cut-To-Length Line SRHJ400-223G
SRJD400-224G

An intelligent CRGO core lamination & cutting line integrating unwinding, feeding, punching/notching, pin-positioning pre-stacking and dual-robot core lamination. It can laminate two CRGO cores simultaneously in full “日” shape or “E+I” shape.

CRGO Core Lamination & Cutting Line SRJD400-224G

View series & specs
CRGO Core Lamination & Cutting Line SRJD400-224G
SRJD400-224G An intelligent CRGO core lamination & cutting line integrating unwinding, feeding, punching/notching, pin-positioning pre-stacking and dual-robot core lamination.

It can laminate two CRGO cores simultaneously in full "H" shape or "E+I" shape.

CRGO Core Lamination & Cutting Line

View series & specs
SREE silicon steel processing line for transformer core production
SRHJ400-223C Transformer-core cut-to-length line with upper & lower log stacking arms. The upper arm stacks 2 logs and the lower arm stacks 3 logs, forming 5 logs (2 yokes, 2 side legs, 1 center leg) for a complete core lamination in one assignment.

Silicon Steel Sheet Cut-To-Length Line

View series & specs
SREE silicon steel cut to length line for transformer cores
SRZJ1250 Silicon steel coil slitting line that slits coils into strips of specified width and rewinds them under controlled tension. Built for high precision, stable operation and efficient production.

Silicon Steel Coil Slitting Line

View series & specs
SREE silicon steel cut to length line for transformer cores

Technology Behind Our Transformer Core Lines

Low‑Burr Slitting

Rigid knife stands, controlled tension and precise settings help you achieve consistently low burr levels.

High-speed cut to length

High-stroke cutting sections and stable feeding help you increase laminations per minute.

Flexible V‑Notching and Punching

Configurable notching and punching heads support different step-lap patterns and window designs.

Automatic Stacking Systems

We have two stacking solutions: integrated robot arms for in-line assembly and dedicated machines for high-volume production.

Technology Behind Our Transformer Core Lines
Custom grooving details

Transformer Cores We Focus On

Core programs & production scenarios

Transformer performance starts with lamination consistency. We design silicon‑steel processing and automation solutions for manufacturers who need repeatable core quality—stable edge condition, predictable geometry, and clean stacking—so results stay consistent from the first batch to long‑run production.

From slitting and cut‑to‑length/punching to automated stacking and line integration, we engineer each project around your core design and takt time. The goal is simple: higher efficiency, tighter precision, and lower total operating cost—without relying on constant manual adjustment.
Transformer Cores We Focus On
Transformer Cores We Focus On

Key Elements of a Reliable Core Line

Precision

Low‑burr cutting and stable tolerances help laminations stack cleanly and keep core quality consistent across shifts and operators.

Efficiency

High‑throughput processing and automation reduce bottlenecks, improve OEE, and shorten changeovers—so output scales without scaling labor.

Reliability

In‑house core components, remote diagnostics, and turnkey responsibility reduce downtime risk and protect long‑term performance after installation.
Case Study

International Client Case Studies

Trusted

Our Qualifications & Certifications

CE Certificate

CE · Machinery Directive 2006/42/EC · valid to 2030

CE Certificate

CE · Machinery Directive 2006/42/EC · valid to 2030

CE Certificate

CE · Machinery Directive 2006/42/EC · valid to 2030

CE Certificate

CE · Machinery Directive 2006/42/EC · valid to 2030

Certificate numbers, issuing body and scope →

SREE. All in one line.

Built on demand.

SREE brings your core line into one connected flow from coil to finished stacks. Configure modules by capacity, layout, and core design, then scale with stable precision and uptime.

SREE
SREE
SREE
SREE
SREE
SREE
Chat on WhatsApp

Pick your regional sales manager

SREE also manufactures leather processing machinery. Visit our leather machinery site
Nantong Sirui Engineering Co., Ltd.（南通思瑞机器制造有限公司）
Unified Social Credit Code: 91320682780276103D · Manufacturing since 1997 · incorporated 2005
苏ICP备05026445号-1