Value-Added Products

Value-Added Products

We offer progressive solutions for companies looking to acquire electrical steel cores. As we grow, we continue to invest in equipment and processes to provide value-added assemblies to help our customers increase their own productivity and reduce costs in their operations.

Distributed Gap (DG) Cores

We offer a variety of DG Core sizes and designs most commonly used in small to medium distribution transformers. Our process produced DG cores that increase efficiency while maintaining material costs due to our ability to enhance the magnetic characteristics by annealing.

Cut Cores

We produce cut cores by winding long strips of electrical steel on a mandrel to tight specifications. After a precision cutting process the core is split into two pieces. The individual cores take on a “C” shaped configuration with rectangular rounded corners. The two sections are polished at the interface and mated together in a process designed to minimize gaps between the two halves. The cores produced by this process save electrical energy due to low specific iron watt losses and are ideal for applications such as medium transformer sizes.


Mapes & Sprowl Steel produces custom toroidal cores in a variety of sizes. With ID ranges from 1.00” to 20” and a max strip width of 6”, we can quickly manufacture your custom designed steel core. All of our toroid cores are annealed after winding for best magnetic properties and can be shipped as bare or epoxy coated.

Taped & Assembled Shunts

We utilize proven technology to produce shunts in a wide range of sizes and tolerance specifications. Materials available, slit in house, from widths of 0.60” to 21.0” in thicknesses from 0.004” to 0.025”.