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）
NA4920UU 100 140 40 134 297 1.98 Double seal
NA4922UU 110 150 40 140 322 2.15 Double seal
NA4924UU 120 165 45 178 410 2.99 Double seal
NA4926UU 130 180 50 206 511 4.08 Double seal
NA4928UU 140 190 50 214 549 4.34 Double seal
RNA6900UU 14 22 22 16.3 20.9 0.027 Double seal
RNA6901UU 20 24 22 15.6 20.4 0.03 Double seal
RNA6902UU 22 28 23 18.4 27.1 0.038 Double seal
RNA6903UU 25 30 23 19.8 30.6 0.04 Double seal
RNA6904UU 25 37 30 33 44.5 0.096 Double seal
RNA69/22UU 28 39 30 33.8 52 0.0975 Double seal
RNA6905UU 30 42 30 39.2 58.6 0.11 Double seal
RNA69/28UU 32 45 30 38.9 59.1 0.133 Double seal
RNA6906UU 35 47 30 40.1 63.1 0.13 Double seal
RNA69/32UU 40 52 36 50.3 88.3 0.17 Double seal
RNA6907UU 42 55 36 51.6 92.6 0.2 Double seal
RNA6908UU 48 62 40 63.7 116.7 0.27 Double seal
RNA6909UU 52 68 40 66.7 126.5 0.355 Double seal
RNA6910UU 58 72 40 70.8 142.2 0.32 Double seal
RNA6911UU 63 80 45 89.4 171 0.47 Double seal