open

Open type needle roller bearings, specifically referring to needle roller bearings with completely open ends and no self sealing/closed end caps (especially common in the stamped outer ring HK series), are an economical choice for compact radial heavy-duty scenarios, different from the single-sided closed BK type and the 2RS type with sealing rings.

Model Basic Dimensions Basic rated dynamic load Weight Type
Inner diameter Outer diameter Thickness Dynamic load Static load
[mm] [mm] [mm] (kN) (kN) （kg）
NA6904 20 37 30 35.4 48.9 0.136 open
NA69/22 22 39 30 36.3 56.9 0.152 open
NA6905 25 42 30 42.1 64.3 0.16 open
NA69/28 28 45 30 41.8 64.8 0.176 open
NA6906 30 47 30 43 69 0.184 open
NA69/32 32 52 36 53.5 95.7 0.295 open
NA6907 35 55 36 54.9 100 0.32 open
NA6908 40 62 40 71.3 135 0.44 open
NA6909 45 68 40 74.6 147 0.52 open
NA6910 50 72 40 79.2 164 0.53 open
NA6911 55 80 45 98.7 194 0.73 open
NA6912 60 85 45 103 211 0.785 open
NA6913 65 90 45 108 227 0.84 open
NA6914 70 100 54 134 311 1.4 open
NA6915 75 105 54 138 331 1.48 open
NA6916 80 110 54 143 351 1.56 open
NA6917 85 120 63 173 467 2.34 open
NA6918 90 125 63 178 490 2.46 open
NA6919 95 130 63 182 514 2.58 open