High Quality and Low Cost

Proven technology accumulated since our company foundation guarantees high quality and low cost for precision stamping dies and the MAC system which was developed in-house. MAC is a system that fuses motor core layers to complete each core product inside the stamping tool as they are stamped, eliminating the need for a separate process after stamping.

Mitsui's motor cores are used in a variety of applications from the high-precision 2.7 mm diameter micro motors of vibrators in portable phones, to the high efficiency and high output 300 mm diameter motor cores required by hybrid automobiles.

*MAC System (Mitsui Automatic Core assembly system)

Out global supply network supplies motor core stamping in Japan and in overseas production facilities in Singapore, Malaysia, Thailand, Philippines, Guangdong, Shanghai, Tianjin, Hong Kong, and Taiwan. This guarantees customers a supply of motor cores of the right quantity at the right time in the right place.

Tool maintenance service is done at the local Mitsui overseas site and includes quick delivery for re-grinding and spare parts of precision stamping tools.

* We also perform the above maintenance for stamping tools originally made by other manufacturers. (details)

Left: Product made of 0.15mm thickness sheets Right: Product made of 0.5mm thickness sheets

With continuing focus on conserving resources and energy by reducing size and weight, Mitsui has successfully developed and utilized a highly efficient core of ultra-thin electromagnetic steel only 0.15 mm thick. (details)