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Miniature & Instrument Bearings

NNB Bearings offers an enormous array of miniature ball bearings ranging in size, application and materials. These bearings are manufactured with inside diameters starting as small as .0400 inches, and are normally used in instrument applications where moderate to precise tolerances are required. Most sizes are available in chrome and stainless steel as well as a variety of internal clearance, retainers, lubrications, tolerances, and starting torques. Most miniature and instrument bearings are available with flanged outer races, and the option of shields or seals as required.


INCH Series:

Inch series miniature bearings are single row ball bearings starting with inside diameters as small as .0400 though .5000.  Miniature bearings carry a moderate radial load and provide high performance in small working parameters.  Inch series bearings are available in stainless and chrome steel. Inch series bearings are available open, shielded, sealed and flanged. These bearings are also offered in various radial plays and ABEC 3, 5 & 7 tolerances.


METRIC Series:

Metric series miniatures bearings are single row bearings starting with inside diameters as small as 1 millimeter though 10 millimeters.  Similar to inch series miniatures, metric series bearings are offered in high precision ABEC 3, 5 & 7 tolerances,  Metric series miniatures are offered as open, shielded, sealed and flanged.  Metric miniatures are offered in stainless and chrome steel and in varying radial plays. 


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NNB Bearings offers bearing cleaning and lubrication services, as well as distributes the following brands of miniature & instrument bearings:

  • GRW
  • Barden
  • Timken