Precision Metal Ball Bearings and Plastic Bearings - SDP/SI
Four classifications of bearing tolerances have been established, providing standards of precision for the correct application of ball bearings. The designations are: ABEC 1, ABEC 5, ABEC 7 and ABEC 9, ABEC 9 being the most precise. SDP/SI carries a wide range of bearing types and materials suitable for industrial and commercial applications.
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