In needle roller bearings with ribs, the outer ring and the needleroller and cage assembly form a self-retaining unit. These bearingswith low radial height and high load capacity are highly suitablefor designs with limited radial space. The bearings are availablewith and without inner rings and in sealed and open versions.Bearings without an inner ring are the best solution for bearingarrangements where the shaft can be hardened and ground.Needle roller bearings with inner ring are used if the shaft cannotbe configured as a rolling bearing raceway.
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| ASAL MODEL | Weight(g) | d（mm） | D（mm） | B（mm） |
| NA6901 | 46 | 12 | 24 | 22 |
| NA6902 | 63.6 | 15 | 28 | 23 |
| NA6903 | 72 | 17 | 30 | 23 |
| NA6904 | 141 | 20 | 37 | 30 |
| NA69/22 | 150 | 22 | 39 | 30 |
| NA6905 | 161 | 25 | 42 | 30 |
| NA69/28 | 182 | 28 | 45 | 30 |
| NA6906 | 192 | 30 | 47 | 30 |
| NA69/32-ZW | 288 | 32 | 52 | 36 |
| NA6907-ZW | 310 | 35 | 55 | 36 |
| NA6908-ZW | 430 | 40 | 62 | 40 |
| NA6909-ZW | 495 | 45 | 68 | 40 |
| NA6910-ZW | 515 | 50 | 72 | 40 |
| NA6911-ZW | 780 | 55 | 80 | 45 |
| NA6912-ZW | 808 | 60 | 85 | 45 |
| NA6913-ZW | 833 | 65 | 90 | 45 |
| NA6914-ZW | 1340 | 70 | 100 | 54 |
| NA6915-ZW | 1450 | 75 | 105 | 54 |
| NA6916-ZW | 1522 | 80 | 110 | 54 |
| NA6917-ZW | 2200 | 85 | 120 | 63 |
| NA6918-ZW | 2310 | 90 | 125 | 63 |
| NA6919-ZW | 2500 | 95 | 130 | 63 |
