Extra-miniature/miniature/small bearings
Characteristics
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 |
Seal | NBR+SPCC-NP | NBR+SPCC-NP |
Standard class | P0 | P0 |
Main purposes of use
Hard disc drives, stepping motors, fan motors, encoders, DVD spindles, small motors, pinch rollers, etc.