Brand Koyo (JTEKT) Item Number DAC3055WCS31 Koyo (JTEKT) Category Angular Contact Ball Bearing Double Row Weight and Dimensions Inner (d) MM 30 Outer (D) MM 55 Width (B) MM 32 Inner (d) Inch 1.1811 Outer (D) Inch 2.1654 Width (B) Inch 1.2598 Weight (kg) 0.27 Product Properties BoreC - Cylindrical Bore Seal2RS - Rubber Seal on Two Sides Cage TypeS - Steel or Standard Cage External ModificationNo External Modification Radial Internal PlayCn Normal Internal Play PrecisionStandard Precision LubricationStandard Lubrication Heat StabilizationNo Heat Stabilization - Temperatures up to 120 °C Split Inner ring / Outer ringStandard