SK Seiko Bearing

Based in Nantong, China and established in 2005, Nantong SK Seiko Co. , Ltd. , dba SK Seiko Bearing, is a high-tech enterprise specializing in the research and development and manufacturing of miniature bearings. The company successfully developed bearings with an inner diameter of 2mm in 2015 and 1mm in 2016.

In 2017, the company's annual production exceeded 200 million units. In May 2026, SK Seiko Bearing closed a round of series C funding co-led by NRL Capital and Orient Jiafu Asset Management with participation from Shanghai Electrical Apparatus Research Institute, Nantong Investment Management, New Hope Capital, BYD and Ningbo Deep Kinetic Energy Enterprise Management, and other investors. SK Seiko Bearing offers miniature bearing including deep groove ball bearings, angular contact ball bearings, dry scroll pump bearings, turbocharger ball bearings, fluid dynamic bearings and high-precision spindle bearings. The products are used in multiple fields such as consumer electronics, industrial control, and medical devices.

The company generates revenue from providing miniature bearing products to different industries. The company will primarily use the series C funding for core technology R&D upgrades, production process improvement, capacity expansion and market development, further consolidating its position in the field of micro and ultra-micro bearings.