Toroidal Core


Benaka manufactures Toroidal Cores that meet customers’ stringent design requirements using High Quality Grade CRGO and CRNGO Material.

To construct the core, silicon steel is slit into a ribbon of steel which is then wound, like a very tight clock spring.

We have multiple slitting lines to facilitate burr-free slitting of mother coils as wide as 1,200 mm down to 5 mm with precision in width to the order of a few microns.

The core is manufactured on fully-automatic Core Winding machines ensuring high stacking factor.

The core is then annealed in an inert atmosphere for relieving any stress. The result is a core in which all molecules are aligned in the direction of flux, thus ensuring the desired electrical characteristics.

We maintain an extensive stock of the electrical steel required in various grades of CRGO and CRNGO, with thicknesses ranging from 0.20 mm to 0.35 mm.

With a range of mandrels, from 10 mm to 150 mm, we are able to manufacture a wide range of cores with a maximum OD of 200 mm.
We can supply bare cores and also with special insulation coatings like Epoxy, Varnish, etc. Plastic End Caps can also be supplied along with the cores. Cores with Edge grinding are also a part of our product range.

Our fully-equipped tool room enables us to develop mandrels of specific sizes as per the customer requirements with short lead times. The tool room is also capable of developing the molds needed for the production of the end caps.

With the right combination of infrastructure, a wide range of mandrel sizes and an extensive range of grades of raw material, we can develop and supply Toroidal cores as per customer specifications, and at a short notice.