• Bearings
  • Rotary Devices
    (Motor & Fans)
  • Electronic Devices
  • Measuring Components
  • Mitsumi Electric Products
  • ABLIC Products
  • U-shin Products
  • Bed Sensor System
  • Smart City Products


World's Smallest Ball Bearings with Ultra-small Outer Diameter of 1.5 mm

World’s smallest steel ball bearing capable of being mass produced was born of MinebeaMitsumi’s passion for ultra precision. Although it is tiny, its precision and performance are comparable with other bearings. These bearings are being installed in Japan’s finest mechanical watches, and we expect their applications to expand into a variety of fields and products in the future.

Outer diameter of 1.50 mm
Inner diameter of 0.50 mm
Thickness (width) of 0.65 mm
Ball diameter of 0.25 mm x 6 balls

Stainless steel
World’s smallest ball bearings with same pressed-steel ball bearing cage structure as regular miniature ball bearings.


Capable of high-speed rotation of more than 5,000 rpm


World's Smallest Class Stepping Motor @ 6 mm & 3 mm Diameter

6mm diameter stepping motor and 3mm diameter stepping motor
Features & Applications


To know more about the products

World's Thinnest Light guide plates for LED backlights @ 0.3 mm thickness

MinebeaMitsumi utlises its proprietary optical design technologies & ultra-precision machining capabilities to provide World’s Thinnest Light guide plates for LED backlights with a thickness of 0.3 mm or smaller.