James Webb Telescope parts

Mitsui Seiki Machines

High-precision Machines

Mitsui Seiki manufactures a diverse range of high-precision machines designed to meet the most demanding industrial applications. Our product lineup includes advanced vertical and horizontal machining centers, jig borers, jig grinders, and thread grinders, all known for their exceptional accuracy and durability.

Horizontal Machining

Cast iron varies in chemical compositions and granular structures, but our structures have a “spring memory” for consistent flexing and returning to the original position, ensuring process predictability, while Mitsui Seiki’s higher cast iron grades are treated with gas emulsion processes to control material composition. View Product Line

Vertical Machining

Many of the machining systems we build are custom-engineered for our clients, yet they share key attributes like our manufacturing and a