RNA, NK type needle roller bearings, this type of bearing has no inner ring, it is suitable for the support structure with limited radial installation size, and the journal matched with the bearing is directly used as the rolling surface. As the shaft of the raceway surface, the hardware must be hardened and ground, and only when it is processed to the appropriate size and shape accuracy, the entire set of needle roller bearings can have a high life and running accuracy. At the same time, since there is no inner ring, the diameter of the shaft can also be appropriately enlarged, thereby increasing the rigidity.
| Bearing Number | Dimensions （mm） |
| RNA4822A | 120×140×30 |
| RNA49/8A | 10×19×11 |
| RNA49/9A | 12×20×11 |
| RNA4900A | 14×22×13 |
| RNA4901A | 16×24×13 |
| RNA4902A | 20×28×13 |
| RNA4902AF | 20×28×13 |
| RNA4903A | 22×30×13 |
| RNA4904A | 25×37×17 |
| RNA4905A | 30×42×17 |
| RNA4906A | 35×47×17 |
| RNA4907A | 42×55×20 |
| RNA4907A/AS4 | 42×55×20 |
| RNA4907AF1 | 42×55×20 |
| RNA4908A | 48×62×22 |
| RNA4909A | 52×68×22 |
| RNA4909AF1 | 52×68×22 |
| RNA4910A | 58×72×22 |
| RNA4910A/YB2 | 58×72×22 |
| RNA4911A | 63×80×25 |
| RNA4912A | 68×85×25 |
| RNA4913A | 72×90×25 |
| RNA4914A | 80×100×30 |
| RNA4915A | 85×105×30 |
| RNA4916A | 90×110×30 |
| RNA4917A | 100×120×35 |
| RNA4918A | 105×125×35 |
| RNA4919A | 110×130×35 |
| RNA4920A | 115×140×40 |
| RNA4922A | 125×150×40 |
| RNA4924A | 135×165×45 |
| RNA59/7A | 10×17×15 |
| RNA59/8A | 12×19×15 |
| RNA5900A | 14×22×16 |
| RNA6901A | 16×24×22 |
| RNA6901 | 16×24×22 |
| RNA6902 | 20×28×23 |
| RNA6903 | 22×30×23 |
| RNA6904 | 25×37×30 |
| RNA69/22 | 28×39×30 |
| RNA6905 | 30×42×30 |
| RNA69/28 | 32×45×30 |
| RNA6906 | 35×47×30 |
| RNA6901AF1 | 16×24×22 |
| RNA6902A | 20×28×23 |
| RNA6903A | 22×30×23 |
| RNA6904A | 25×37×30 |
| RNA6905A | 30×42×30 |
| RNA6905ATN1 | 30×42×30 |
| RNA6905AF1A | 30×42×30 |
| RNA6906A | 35×47×30 |
| RNA49/7X2A | 10×17×12 |
| RNA4905X2A | 30×42×20 |
| RNA49/38X3A | 45×55×22 |
| RNA4908X2A | 45×62×24 |
| RNA4908X3A |
|
| RNA4952X3A | 55×68×25 |
| RNA59/7X2A | 10×17×15 |
| RNA59/8X2A | 12×19×15 |
| RNA5902X3A | 19×27×16 |
| RNA5904X3A | 25×35×25 |
| RNA5908X3A | 50×65×34 |
| RNA59/38X3A | 50×65×35 |
| RNA6903X2A/AS1 | 45×55×32 |
| RNA5001X3A | 16×27×25 |
| RNA5001X2A | 20×28×20 |
| RNA5002X2A | 18×32×25 |
| RNA5003X2A | 22×35×25 |
| RNA5006X3A | 45×55×32 |
| RNA5007X1A | 50×64×36 |
| RNA6001X2A | 20×28×25 |
| RNA6001X2L1A | 20×28×25 |
| RNA6002X1A | 18×33×30 |
| RNA6002X1ATN1 | 18×33×30 |
| RNA6/37A | 37×52×22 |
| NK16/16A | 16×24×16 |
| NK16/20A | 16×24×20 |
| NK16/20AF1 | 16×24×20 |
| NK14/16A | 14×22×16 |
| NK20/20A | 20×28×20 |
| NK20/25A | 20×28×25 |
| NK22/20A | 22×30×20 |
| NK25/16A | 25×33×16 |
| NK25/20A/ASI | 25×33×20 |
| NK32/20A | 32×42×20 |
| NK55/25A | 55×68×25 |
| RNA2913/YA4 | 75×90×16 |
| RNA4822 | 120×140×30 |
| RNA4824 | 130×150×30 |
| RNA4826 | 140×165×35 |
| RNA4838M/YA5 | 210×240×50 |
| RNA49/8 | 10×19×11 |
| RNA4900 | 14×22×13 |
| RNA4901 | 16×24×13 |
| RNA4902 | 20×28×13 |
| RNA4903 | 22×30×13 |
| RNA4904 | 25×37×17 |
| RNA49/22 | 28×39×17 |
| RNA4905 | 30×42×17 |
| RNA49/28 | 32×45×17 |
| RNA4906 | 35×47×17 |
| RNA49/32 | 40×52×20 |
| RNA4907 | 42×55×20 |
| RNA4908 | 48×62×22 |
| RNA4909 | 52×68×22 |
| RNA4910 | 58×72×22 |
| RNA4911 | 63×80×25 |
| RNA4912 | 68×85×25 |
| RNA4913 | 72×90×25 |
| RNA4914 | 80×100×30 |
| RNA4915 | 85×105×30 |
| RNA4916 | 90×110×30 |
| RNA4917 | 100×120×35 |
| RNA4918 | 105×125×35 |
| RNA4919 | 110×130×35 |
| RNA4920 | 115×140×40 |
| RNA4922 | 125×150×40 |
| RNA4924 | 135×165×45 |
| RNA4926 | 150×180×50 |
| RNA4928 | 160×190×50 |
| RNA4002 | 20×32×17 |
| RNA4004 | 26×42×22 |
| RNA4004/S0 | 26×42×22 |
| RNA4005 | 34×47×22 |
| RNA4006 | 40×55×25 |
| RNA4007/YA4 | 45×62×27 |
| RNA4007 | 46×62×27 |
| RNA4008 | 52×68×28 |
| RNA4009 | 57×55×30 |
| RNA4010 | 62×80×30 |
| RNA4011 | 70×90×35 |
| RNA48/9X2 | 17×25×16 |
| RNA4805X3 | 32×38×11 |
| RNA4811X2 | 60×72×16 |
| RNA6804X3 | 25×32×28 |
| RNA6807X3 | 38×48×25 |
| RNA49/8X2 | 12×19×12 |
| RNA49/8X3 | 10×17×12 |
| RNA49/8X3TN | 10×17×12 |
| RNA49/9X3 | 12×19×12 |
| RNA4907X2 | 40×55×22 |
| RNA49/42X3 | 50×65×25 |
| RNA4909X3 | 50×65×25 |
| RNA49/52X3 | 60×72×25 |
| RNA6901X3 | 16×22×20 |
| RNA69/22X3 | 28×40×32 |
| RNA6906X1 | 35×57×30 |
| RNA6910X3 | 56×70×50 |
| RNA6910X3-1 | 56×70×45 |
| RNA3002X2 | 20×32×12 |
| RNA50/28X1 | 35×51×32 |
| RNA5007 | 40.7×62×36 |
| RNA5007X3 | 42×65×32 |
| RNA5008X3 | 48.3×72×40 |
| RNA6/15 | 15×25×12 |
| RNA6/17 | 17×30×12 |
| RNA6/18 | 18×26×20 |
| RNA6/19.2 | 19.2×30×23 |
| RNA6/24 | 24×42.86×25.6 |
| RNA6/26P5 | 26×60×34 |
| RNA6/28 | 28×45×19 |
| RNA6/28X1-3 | 27.1×42×22 |
| RNA6/32 | 32×50×35 |
| RNA6/34ASI | 34×50×35 |
| RNA6/34.4 | 34.4×52×32 |
| RNA6/445 | 44.5×58.7×19 |
| RNA6/76.2 | 76.2×95.25×44.45 |
| NK6/12TN | 6×12×12 |
| NK8/12P6S1 | 8×15×12 |
| NK8/12TN | 8×15×12 |
| NK8/16TN | 8×15×16 |
| NK9/12 | 9×16×12 |
| NK14/16 | 14×22×16 |
| NK14/20 | 14×22×20 |
| NK15/12 | 15×25×12 |
| NK15/16 | 15×23×16 |
| NK15/20 | 15×23×20 |
| NK16/16 | 16×24×16 |
| NK16/20 | 16×24×20 |
| NK16/22 | 16×24×22 |
| NK17/16 | 17×25×16 |
| NK18/20 | 18×26×20 |
| NK19/16 | 19×27×16 |
| NK19/20 | 19×27×20 |
| NK20/12 | 20×33×12 |
| NK20/16 | 20×28×16 |
| NK20/20 | 20×28×20 |
| NK21/20 | 21×29×20 |
| NK22/16 | 22×30×16 |
| NK22/20 | 22×30×20 |
| NK22/20TN | 22×30×20 |
| NK24/16 | 24×32×16 |
| NK24/20 | 24×32×20 |
| NK25/16 | 25×33×16 |
| NK25/20 | 25×33×20 |
| NK25/30 | 25×33×30 |
| NK26/16 | 26×34×16 |
| NK26/20 | 26×34×20 |
| NK28/20 | 28×37×20 |
| NK28/30 | 28×37×20 |
| NK29/20 | 29×38×20 |
| NK29/30 | 29×38×30 |
| NK30/20 | 30×40×20 |
| NK30/30 | 30×40×30 |
| NK32/20 | 32×42×20 |
| NK32/30 | 32×42×30 |
| NK35/20 | 35×45×20 |
| NK35/30 | 35×45×30 |
| NK37/20 | 37×47×20 |
| NK37/30 | 37×47×30 |
| NK38/20 | 38×48×20 |
| NK38/30 | 38×48×30 |
| NK40/20 | 40×50×20 |
| NK40/30 | 40×50×30 |
| NK42/20 | 42×52×20 |
| NK42/30 | 42×52×30 |
| NK43/20 | 43×53×20 |
| NK43/30 | 43×53×30 |
| NK45/20 | 45×55×20 |
| NK45/30 | 45×55×30 |
| NK45/40 | 45×65×40 |
| NK45/54 | 45×60×54 |
| NK47/20 | 47×57×20 |
| NK47/30 | 47×57×30 |
| NK50/25 | 50×62×25 |
| NK50/27/YA | 50×67×27 |
| NK50/35 | 50×62×35 |
| NK55/25 | 55×68×25 |
| NK55/35 | 55×68×35 |
| NK60/25 | 60×72×25 |
| NK60/35 | 60×72×35 |
| NK65/25 | 65×78×25 |
| NK65/35 | 65×78×35 |
| NK65/35/ASI | 65×78×35 |
| NK68/25 | 68×82×25 |
| NK68/35 | 68×82×35 |
| NK70/25 | 70×85×25 |
| NK70/25/YA | 70×85×25 |
| NK70/35 | 70×85×35 |
| NK73/25 | 73×90×25 |
| NK73/35 | 73×90×35 |
| NK75/25 | 75×92×25 |
| NK75/35 | 75×92×35 |
| NK80/25 | 80×95×25 |
| NK80/35 | 80×95×35 |
| NK80/60 | 80×170×60 |
| NK85/25 | 85×105×25 |
| NK85/35 | 85×105×35 |
| NK90/25 | 90×110×25 |
| NK90/35 | 90×110×35 |
| NK95/26 | 95×115×26 |
| NK95/36 | 95×115×36 |
| NK100/26 | 110×120×26 |
| NK100/36 | 110×120×36 |
| NK105/26 | 105×125×26 |
| NK105/36 | 105×125×36 |
| NK110/30 | 110×130×30 |
| NK110/40 | 110×130×40 |
| RNAP4005X3 | 30×46×23 |
| RNAP6/26 | 26×60×34 |
| RNAP6/32 | 35×60×34 |
| RNA4912B | 70×85×20 |
| RNA4004B | 27.1×42×22 |
| RNA50/28B | 34.4×52×32 |
| RNA5007B | 40.7×62×36 |
| RNA5900X3B | 14×21×17 |
| RNA5006X3B | 38×56×38 |
| RNA6801X2B | 15×21×17 |
| RNA6902X1B | 19.2×30×23 |
| RNA69/42X1B | 48.3×72×40 |
| RNA6/175X3Q1 | 175×245×160 |