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） | ||
| RNA493 | 5 | 11 | 10 | 2.42 | 1.95 | 0.0046 | open |
| RNA494 | 6 | 12 | 10 | 2.7 | 2.32 | 0.0053 | open |
| RNA495 | 7 | 13 | 10 | 2.96 | 2.69 | 0.0059 | open |
| RNA496 | 8 | 15 | 10 | 3.9 | 3.4 | 0.0073 | open |
| RNA497 | 9 | 17 | 10 | 4.5 | 3.6 | 0.0093 | open |
| RNA498 | 10 | 19 | 11 | 6.2 | 5 | 0.0126 | open |
| RNA499 | 12 | 20 | 11 | 6.6 | 6.3 | 0.0136 | open |
| RNA4900 | 14 | 22 | 13 | 9.2 | 10.1 | 0.0165 | open |
| RNA4901 | 16 | 24 | 13 | 9.7 | 11.1 | 0.0181 | open |
| RNA49/14 | 18 | 26 | 13 | 10.6 | 12.8 | 0.0199 | open |
| RNA4902 | 20 | 28 | 13 | 10.9 | 13.8 | 0.0215 | open |
| RNA4903 | 22 | 30 | 13 | 11.8 | 15.6 | 0.0235 | open |
| RNA4904 | 25 | 37 | 17 | 21 | 25 | 0.0555 | open |
| RNA49/22 | 28 | 39 | 17 | 21.4 | 28.8 | 0.0565 | open |
| RNA4905 | 30 | 42 | 17 | 23.7 | 30.7 | 0.064 | open |
| RNA49/28 | 32 | 45 | 17 | 24.5 | 32.7 | 0.0765 | open |
| RNA4906 | 35 | 47 | 17 | 25.2 | 34.7 | 0.0725 | open |
| RNA49/32 | 40 | 52 | 20 | 31.3 | 47.9 | 0.096 | open |
| RNA4907 | 42 | 55 | 20 | 32 | 50.2 | 0.113 | open |
| RNA49/38 | 45 | 58 | 20 | 33.6 | 54.6 | 0.12 | open |
