d:  D: B:  
Bearing No.Internal DiameterOutside DiameterWidthCatalogue
WR1938152D 152.27 38.1 18.961 WR Series
WR1938153DD 152.91 38.1 18.961 WR Series
K52X57X12 52 57 12 K Series
RNA4909 52 68 22 RNA49 Series
RNA4909-RS 52 68 22 RNA 49...RS Series
RNA4909-2RS 52 68 22 RNA49...2RS Series
RNA6909 52 68 40 RNA69 Series
613008 52.39 87.3 Clutch Release Bearing
52TKD01 52.4 96 Clutch Release Bearing
CT52A-1 52.4 97 Clutch Release Bearing
52TMK804 52.4 94 Clutch Release Bearing
1614 9.525 28.575 9.525 1600 Series
1606 9.525 23.019 7.938 1600 Series
1604 9.525 22.225 7.144 1600 Series
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