- MinebeaMitsumi Inc.
- 1.49 millimetre(s)
- Japan (Tokyo)
The smallest commercially available steel ball bearing measures 1.49 mm (0.058 in) in outer diameter and was manufactured by MinebeaMitsumi Inc. (Japan) in Japan. The measurement was verified on 3 July 2015.
The smallest commercially available steel ball bearing measures 1.4978 mm (0.0589685 in) in outer diameter, 0.4972 mm (0.0195748 in) in inner diameter, and 0.6403 mm (0.0252087 in) in width. Ten samples of smallest ball steel ball bearings were directly procured and measured by A-KIT Corporation in accordance with ISO492 on 3 July 2015. MinebeaMitsumi Inc. currently has 102 of the smallest steel ball bearings in stock ready to be sold commercially.