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）
NA4902U 15 28 13 9.6 11.7 0.036 Single seal
NA4903U 17 30 13 10.3 13.1 0.0395 Single seal
NA49/22U 22 39 17 18.3 23.7 0.0875 Single seal
NA4905U 25 42 17 20.3 25.1 0.0925 Single seal
NA49/28U 28 45 17 21 26.8 0.101 Single seal
NA4906U 30 47 17 21.6 28.4 0.106 Single seal
NA49/32U 32 52 20 29.4 44.2 0.167 Single seal
NA4907U 35 55 20 30.1 46.3 0.179 Single seal
NA4908U 40 62 22 37.2 58.3 0.245 Single seal
NA4909U 45 68 22 38.8 63.4 0.29 Single seal
NA4910U 50 72 22 41.3 71.1 0.295 Single seal
NA4911U 55 80 25 52.2 85.7 0.415 Single seal
NA4912U 60 85 25 54.5 92.8 0.445 Single seal
NA4913U 65 90 25 56.8 99.8 0.475 Single seal
NA4914U 70 100 30 76.9 143 0.77 Single seal
NA4915U 75 105 30 79.6 153 0.815 Single seal
NA4916U 80 110 30 80.7 158 0.86 Single seal
NA4917U 85 120 35 103 225 1.3 Single seal
NA4918U 90 125 35 106 238 1.36 Single seal
NA4919U 95 130 35 109 250 1.42 Single seal