OKK started its career in 1915 with the production of household pumps. It started manufacturing its machine tools in 1934, and today its horizontal and vertical machines are known worldwide.

Nidec Corporation acquired OKK in 2022, raising their presence in the CNC machining industry to the next level. The main parts are produced in-house, which has been operating for more than 60 years, so most of their machine tools consist of original parts, thus contributing to their 100% quality control philosophy. It includes, among other things, all the spindles, the mechanical drives, its own square precision slide guides, and special control functions.