RotoPrecision Miniature and Instrument Bearings

Tolerances

The tolerances for the dimensions of miniature and instrument bearings are classified according to standards derived by the Annular Bearing Engineers Committee (ABEC). These standards are distinguished by criteria based on specific bearing dimensions including the internal geometry of a bearing and mounting characteristics such as the bore diameter (d), outer diameter (D) and width (B).

ABEC standards range from ABEC 1 to 9, with higher numbers indicating tighter tolerances and additional requirements to ensure the increasing degrees of precision. The standard ABEC grade for RotoPrecision miniature and instrument bearings is ABEC 3. ABEC 5, 7 and 9 are also available depending on your requirements. 

For any additional information or for immediate assistance,
please contact Application Support.
 


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