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） | ||
| RNA4922 | 125 | 150 | 40 | 152 | 357 | 1.28 | open |
| RNA4924 | 135 | 165 | 45 | 187 | 435 | 1.93 | open |
| RNA4926 | 150 | 180 | 50 | 216 | 540 | 2.36 | open |
| RNA4928 | 160 | 190 | 50 | 224 | 580 | 2.5 | open |
| RNA4930 | 170 | 210 | 60 | 324 | 712 | 4.09 | open |
| RNA4932 | 180 | 220 | 60 | 337 | 761 | 4.31 | open |
| RNA4934 | 190 | 230 | 60 | 347 | 810 | 4.53 | open |
| RNA4936 | 205 | 250 | 69 | 434 | 989 | 6.25 | open |
| RNA4938 | 215 | 260 | 69 | 440 | 1020 | 6.5 | open |
| RNA4940 | 225 | 280 | 80 | 518 | 1120 | 10.4 | open |
| RNA4944 | 245 | 300 | 80 | 536 | 1200 | 11.2 | open |
| RNA4948 | 265 | 320 | 80 | 565 | 1320 | 12 | open |
| RNA4952 | 290 | 360 | 100 | 847 | 1900 | 21.2 | open |
| RNA4956 | 310 | 380 | 100 | 877 | 2040 | 22.5 | open |
| RNA4960 | 340 | 420 | 118 | 1130 | 2650 | 33.4 | open |
| RNA4964 | 360 | 440 | 118 | 1170 | 2830 | 35.2 | open |
| RNA4968 | 380 | 460 | 118 | 1220 | 3020 | 37 | open |
| RNA4972 | 400 | 480 | 118 | 1260 | 3200 | 38.7 | open |
| RNA4976 | 430 | 520 | 140 | 1540 | 4030 | 56.4 | open |
| RNA4980 | 450 | 540 | 140 | 1590 | 4270 | 58.8 | open |
