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Extra-miniature/miniature/small bearings


The MR and 67 Series (thin) and 63 Series (thick) models of small bearings 0.6 to less than 10 mm in inner diameter are available to suit different use loads and rotation speeds. There are open, sealed and shielded types and bearing steel and stainless-steel materials to choose from.
These deep-groove ball bearings are suited to parts of devices that require high-speed rotation, low-friction torque and low vibration/noise in order to make such devices smaller, lighter-weight and thinner.

Our company’s bearing classification Bore diameter(mm) Outer diameter(mm)
Extra-miniature bearings d≦2 D≦7
Miniature bearings d≦5 D<9
Small bearings d<10 D≧9

Main specifications

Parts High-carbon chromium bearing steel Stainless steel
Inner/outer rings SUJ2 KS440
Balls SUJ2 SUS440C
Cage SPCC SUS304
Shield SECC-NC SUS304
Standard class P0 P0

Main purposes of use

Hard disc drives, stepping motors, fan motors, encoders, DVD spindles, small motors, pinch rollers, etc.

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