Single seal

The single sealed needle roller bearing is a derivative of the standard needle roller bearing that integrates a single-sided sealing structure. It is divided into two core categories: stamped outer ring/solid outer ring, and no inner ring/with inner ring. The sealing side achieves dust and grease leakage prevention, and the opening side can be easily refilled, balancing sealing protection and maintenance flexibility. It is suitable for industrial scenarios with mild sealing requirements such as dust and humidity that require regular lubrication. It is the mainstream choice in the fields of engineering machinery, automotive parts, conveying equipment, agricultural machinery, etc.

Model Basic Dimensions Basic rated dynamic load Weight Type
Inner diameter Outer diameter Thickness Dynamic load Static load
[mm] [mm] [mm] (kN) (kN) （kg）
NA4920U 100 140 40 134 297 1.98 Single seal
NA4922U 110 150 40 140 322 2.15 Single seal
NA4924U 120 165 45 178 410 2.99 Single seal
NA4926U 130 180 50 206 511 4.08 Single seal
NA4928U 140 190 50 214 549 4.34 Single seal
RNA6900U 14 22 22 15.6 20.4 0.027 Single seal
RNA6901U 20 24 22 15.6 20.4 0.03 Single seal
RNA6902U 22 28 23 18.4 27.1 0.038 Single seal
RNA6903U 25 30 23 19.8 30.6 0.04 Single seal
RNA6904U 25 37 30 33 44.5 0.096 Single seal
RNA69/22U 28 39 30 33.8 52 0.0975 Single seal
RNA6905U 30 42 30 39.2 58.6 0.11 Single seal
RNA69/28U 32 45 30 38.9 59.1 0.133 Single seal
RNA6906U 35 47 30 40.1 63.1 0.13 Single seal
RNA69/32U 40 52 36 50.3 88.3 0.17 Single seal
RNA6907U 42 55 36 51.6 92.6 0.2 Single seal
RNA6908U 48 62 40 63.7 116.7 0.27 Single seal
RNA6909U 52 68 40 66.7 126.5 0.355 Single seal
RNA6910U 58 72 40 70.8 142.2 0.32 Single seal
RNA6911U 63 80 45 89.4 171 0.47 Single seal