CRGO Laminations
Cold Rolled Grain Oriented electrical steel laminations, cut and prepared for transformer core building.
Products
CRGO & CRNGO laminations, strips and transformer core components
Everything on this page is supplied against customer-specific requirements. Sizes, profiles, grades and thickness are settled during the enquiry — send a drawing, a dimension sheet or a sample and we will work from that.
CRNGO Laminations
CRNGO Laminations
Cold Rolled Non-Grain Oriented laminations for rotating machines, ballasts and general electrical assemblies.
Transformer Core Laminations
Lamination sets prepared for stacking into single-phase and three-phase transformer cores.
CRGO & CRNGO Strips
Electrical steel slit to width, supplied as strip for lamination cutting and core work.
E & I Laminations
Interlocking E and I profile laminations for single-phase transformers, chokes and small electrical equipment.
Custom Cut Laminations
Non-standard lamination profiles cut from your drawing, sample or dimension sheet.
Product 01
CRGO Laminations
CRGO (Cold Rolled Grain Oriented) silicon steel is the standard core material for power and distribution transformers. The grain structure is aligned during rolling, which is what allows the core to carry flux efficiently along the rolling direction. We supply CRGO laminations cut to the profile and dimensions specified by the customer, including mitred (45 degree) ends for mitred and step-lap core construction as well as plain square-cut pieces.
Applications
- Distribution transformer cores
- Power transformer cores
- Current and potential transformers
- Reactors and chokes
Key characteristics
- Cut to customer-supplied drawings and dimensions
- Square-cut and mitred (45 degree) ends both handled
- Handled and packed to limit edge damage in transit
- Grades and thickness discussed against your requirement
CRNGO Laminations
Product 02
CRNGO Laminations
CRNGO (Cold Rolled Non-Grain Oriented) steel has uniform magnetic properties in all directions in the plane of the sheet. That makes it the practical choice wherever flux does not follow a single fixed path — motors, alternators, small transformers, ballasts and a wide range of electrical assemblies.
Applications
- Small and medium transformers
- Motor and alternator stampings
- Chokes and ballasts
- General electrical assemblies
Key characteristics
- Supplied against customer-specific profiles
- Suitable where multi-directional flux is involved
- Consistent cutting for repeat production batches
- Requirement-based grade selection
Product 03
Transformer Core Laminations
A transformer core is built from many thin, insulated laminations stacked together rather than one solid block — that is what keeps eddy-current losses down. We prepare lamination sets so the yoke and limb pieces arrive matched, counted and ready for the stacking bench.
Applications
- Single-phase transformer cores
- Three-phase transformer cores
- Transformer rewinding and reconditioning
- Replacement core sets
Key characteristics
- Sets prepared against the customer core design
- Limb and yoke pieces supplied together
- Suitable for both new build and repair work
- Clamped and bolted core assemblies also handled
Product 04
CRGO & CRNGO Strips
Strip is electrical steel slit down to a working width before it is cut into finished laminations. Customers who run their own cutting or stamping operation frequently buy at this stage. Widths are slit against the width list you supply.
Applications
- Feed material for in-house lamination cutting
- Wound and toroidal core work
- Stamping operations
- Core repair and rebuild shops
Key characteristics
- Slit to the widths on your requirement list
- CRGO and CRNGO both handled
- Supplied in customer-agreed pack sizes
- Fixing holes punched to your position where required
Product 05
E & I Laminations
The E and I profile is the most widely used shape in small single-phase transformers and chokes. The E pieces and I pieces interleave to form a closed magnetic path with a minimal air gap. We supply E & I laminations in the profile sizes our customers ask for.
Applications
- Single-phase transformers
- Control and isolation transformers
- Chokes, ballasts and inductors
- Small electrical and electronic equipment
Key characteristics
- Matched E and I pieces supplied together
- Profile sizes to customer requirement
- Suitable for repeat production runs
- Available in CRGO and CRNGO as required
Product 06
Custom Cut Laminations
A large share of our work is not a catalogue item at all. Customers send a drawing, a dimension sheet or a physical sample of an existing lamination, and we work out the cutting against it. If you are replacing a lamination for a machine that is no longer supported, a sample piece is usually enough to start the discussion.
Applications
- Obsolete or replacement lamination profiles
- Prototype and development batches
- Machine-specific core components
- Low-volume special requirements
Key characteristics
- Worked from drawing, sketch or physical sample
- Suitable for one-off and repeat requirements
- Requirement discussed before commitment
- Feasibility confirmed before you place the order
Material Notes
CRGO and CRNGO — the practical difference
Useful if you are specifying material for the first time or comparing quotes.
CRGO — Cold Rolled Grain Oriented
The grain structure is deliberately aligned during rolling, so magnetic performance is strongest along the rolling direction. That suits transformer cores, where the flux path is fixed and predictable, and it is why CRGO is the default choice for distribution and power transformer laminations.
CRNGO — Cold Rolled Non-Grain Oriented
Magnetic properties are broadly uniform in every direction in the plane of the sheet. That is what you want where flux does not follow one fixed path — motors, alternators, ballasts, chokes and many small transformers.
Why laminations instead of solid steel
A solid core would carry large circulating eddy currents and waste energy as heat. Building the core from many thin, insulated laminations breaks up those current paths, which is the whole reason the material is supplied as thin sheet in the first place.
Getting the specification right
Grade, thickness and profile all interact with the core design and the losses you are willing to accept. Rather than publishing figures that may not suit your application, we discuss it against your actual requirement.
Custom Work
Looking for a custom size or lamination profile?
Send us your drawing, dimensions or requirement for discussion. A clear photograph of an existing lamination alongside a ruler is usually enough to get started if no drawing exists.