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ABIS Miniature and Precision Ball Bearings

With bores of 0.6 to 90mm and precision grades to ABEC 7


Inch/Metric Bearing
Desired Bore
Desired Outer Diameter

basic rules for selection & handling of bearings


  • The efficiency of miniature or thin section bearings can be greatly affected by the precision of shaft and housing seats. The accuracy of the surrounding must be such that it will not adversely affect the operation of the bearing. If you have any questions, in particular regarding series 6700 and 6800, please contact us.
  • In applications with steel crown type cages (W type), where high acceleration, heavy loads, shock loads or vertical shafts occur or where oil is the only lubricant available, please contact us. 
  • Selection of fitting clearance and grease type requires a careful consideration of rotating speed, load conditions and temperature in order to prevent premature bearing failure. 
  • Full complement ball bearing are suitable for low speed and heavy radial load conditions. There is a danger of ball being pushed out of the bearing through the filling slot, even under light axial load. For this reason, full complement ball bearings are not suitable for supporting axial loads.


  • The actual assembly area should be kept free from dust as any contamination has a detrimental effect on the operation and life of rolling bearings. If there is any doubt concerning the cleanliness of a bearing, it can be washed with a suitable agent and then re-lubricated.
  • When bearings are being fitted care should be taken to ensure that the ring concerned is presented squarely to the mating surface and that any fitting load required is applied via the ring being fitted – NOT UNDER ANY CIRUMSTANCES FROM ONE RING TO THE OTHER THROUGH THE BALLS. If it is necessary to heat the bearing to facilitate fitting, the temperature should not exceed +120oC.
  • After assembly, the bearing should be rotated to check its correct operation. If the bearing does not appear to be functioning correctly, it should be re-examined to establish the cause of the malfunction.
  • It is not advisable to mix oils and greases as this will affect the efficiency of the bearing.
  • Bearings must be stored in a clean environment with stable temperature. They should be handled with care to avoid the possibility of corrosion and rusting.
  • Lint-free cloth must be used to wipe shaft and housing seats to avoid the ingress of contaminants into the bearing. 


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