Double seal

The double sealed needle roller bearing is a derivative of the standard needle roller bearing that integrates a double-sided sealing structure. It is divided into sub types such as stamped outer ring/solid outer ring, no inner ring/with inner ring, contact/non-contact sealing, etc. The double-sided sealing achieves all-round dust prevention, waterproofing, and grease leakage prevention without the need for additional maintenance and grease replenishment. It is suitable for industrial scenarios with harsh sealing requirements such as dust, moisture, and oil pollution. It is the mainstream choice for outdoor/heavy-duty equipment such as construction machinery, agricultural machinery, conveying equipment, and automotive chassis.

Model Basic Dimensions Basic rated dynamic load Weight Type
Inner diameter Outer diameter Thickness Dynamic load Static load
[mm] [mm] [mm] (kN) (kN) （kg）
NA4902UU 15 28 13 9.6 11.7 0.036 Double seal
NA4903UU 17 30 13 10.3 13.1 0.0395 Double seal
NA49/22UU 22 39 17 18.3 23.7 0.0875 Double seal
NA4905UU 25 42 17 20.3 25.1 0.0925 Double seal
NA49/28UU 28 45 17 21 26.8 0.101 Double seal
NA4906UU 30 47 17 21.6 28.4 0.106 Double seal
NA49/32UU 32 52 20 29.4 44.2 0.167 Double seal
NA4907UU 35 55 20 30.1 46.3 0.179 Double seal
NA4908UU 40 62 22 37.2 58.3 0.245 Double seal
NA4909UU 45 68 22 38.8 63.4 0.29 Double seal
NA4910UU 50 72 22 41.3 71.1 0.295 Double seal
NA4911UU 55 80 25 52.2 85.7 0.415 Double seal
NA4912UU 60 85 25 54.5 92.8 0.445 Double seal
NA4913UU 65 90 25 56.8 99.8 0.475 Double seal
NA4914UU 70 100 30 76.9 143 0.77 Double seal
NA4915UU 75 105 30 79.6 153 0.815 Double seal
NA4916UU 80 110 30 80.7 158 0.86 Double seal
NA4917UU 85 120 35 103 225 1.3 Double seal
NA4918UU 90 125 35 106 238 1.36 Double seal
NA4919UU 95 130 35 109 250 1.42 Double seal