Mitsui Seiki USA

Mitsui Seiki USA is the US office of Mitsui Seiki. It is based at 563 Commerce Street in Franklin Lakes, New Jersey. The site describes the company as a builder of application specific machine tools. The main factory in Kawajima, Japan was built in 2001.

The site lists horizontal machining centers, including 5-axis trunnion, table-on-table and tilt spindle series. It also lists vertical machining centers, 4 and 5 axis horizontal machines, jig borers, jig grinders and thread grinders. The site lists models such as the HU100-5X and the Vertex 75X III.

The site says the company works with aerospace, automotive, optics and other sectors. It lists aero structures, power systems and landing systems as aerospace uses. It also lists mold and die, plates, cores and cavities, tooling, ultra precision parts, semiconductor and compressor work.

Northrop Grumman was the prime contractor for the James Webb Space Telescope. The site says Mitsui Seiki machines were chosen to make its mirror segments. The contractor, Axsys Technologies, selected the machine tools in 2004.

The site says the company has technicians for routine maintenance, troubleshooting and repairs. It offers preventative maintenance, parts and service, product engineering and application engineering. The company says its service helps machines run at peak performance.

The site says machines can be built into automated cells. These cells can handle process automation, quality control, material handling and tool management. The site says the company can supply systems from the simplest setups to fully automated cells.

The site lists two phone numbers, 201 337 1300 and 310 516 8655. It has an inquiry form, a careers section and a list of events. The site lists events for IMTS 2026 and JIMTOF 2026.