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） | ||
| RNA4908 | 48 | 62 | 22 | 41.6 | 67.4 | 0.152 | open |
| RNA49/42 | 50 | 65 | 22 | 42.5 | 70.3 | 0.174 | open |
| RNA4909 | 52 | 68 | 22 | 43.5 | 73.4 | 0.197 | open |
| RNA49/48 | 55 | 70 | 22 | 44.3 | 76.3 | 0.188 | open |
| RNA4910 | 58 | 72 | 22 | 46.2 | 82.1 | 0.179 | open |
| RNA49/52 | 60 | 75 | 22 | 47.1 | 85.1 | 0.205 | open |
| RNA4911 | 63 | 80 | 25 | 57.6 | 97.3 | 0.265 | open |
| RNA49/58 | 65 | 82 | 25 | 58.9 | 101 | 0.275 | open |
| RNA4912 | 68 | 85 | 25 | 60.1 | 104.9 | 0.285 | open |
| RNA49/62 | 70 | 88 | 25 | 61.5 | 109 | 0.32 | open |
| RNA4913 | 72 | 90 | 25 | 62.8 | 113.8 | 0.325 | open |
| RNA49/68 | 75 | 95 | 30 | 79.9 | 147 | 0.47 | open |
| RNA4914 | 80 | 100 | 30 | 83.2 | 157.9 | 0.495 | open |
| RNA4915 | 85 | 105 | 30 | 86.2 | 169.7 | 0.525 | open |
| RNA4916 | 90 | 110 | 30 | 87.4 | 174.6 | 0.55 | open |
| RNA49/82 | 95 | 115 | 30 | 90 | 186 | 0.575 | open |
| RNA4917 | 100 | 120 | 35 | 109.8 | 244.2 | 0.705 | open |
| RNA4918 | 105 | 125 | 35 | 112.8 | 257.9 | 0.74 | open |
| RNA4919 | 110 | 130 | 35 | 116.7 | 270.7 | 0.77 | open |
| RNA4920 | 115 | 140 | 40 | 145 | 329 | 1.19 | open |
