There is an inner ring NA.NK type needle roller bearing. Since the inner ring has no rib, the inner ring, outer ring, a full set of needle rollers and cages can be installed separately, and the axial displacement of the shaft or housing is not restricted. Since the needle rollers are separated by a cage, the friction is reduced, so it can be used in parts with high rotation speed.
| Bearing Number | Dimensions （mm） |
| NA4822 | 110×140×30 |
| NA4822A | 110×140×30 |
| NA4824 | 120×150×30 |
| NA4824A | 120×150×30 |
| NA4826A | 130×165×35 |
| NA4826 | 130×165×35 |
| NA4828A | 140×175×35 |
| NA4828 | 140×175×35 |
| NA4832A | 160×200×40 |
| KA4832A | 170×215×45 |
| NA4836A | 180×225×45 |
| NA4844A | 220×270×50 |
| NA4844A/YA4 | 220×270×50 |
| NA4852A | 260×320×60 |
| NA4856A | 280×350×69 |
| NA4900A | 10×22×13 |
| NA4900A/YA | 10×22×13 |
| NA4900 | 10×22×13 |
| NA4901A | 12×24×13 |
| NA4901 | 12×24×13 |
| NA4902A | 15×28×13 |
| NA4902 | 15×28×13 |
| NA4903A | 17×30×13 |
| NA4903 | 17×30×13 |
| NA4903AS2 | 17×30×13 |
| NA4904A | 20×37×17 |
| NA4904A/YA2 | 20×37×17 |
| NA4904 | 20×37×17 |
| NA49/22 | 22×39×17 |
| NA4905A | 25×42×17 |
| NA4505 | 25×42×17 |
| NA49/28 | 28×45×17 |
| NA4906A | 30×47×17 |
| NA4906 | 30×47×17 |
| NA49/32 | 32×52×20 |
| NA4907A | 35×55×20 |
| NA4907 | 35×55×20 |
| NA4908A | 40×62×22 |
| NA4908 | 40×62×22 |
| NA4909A | 45×68×22 |
| NA44909 | 45×68×22 |
| NA4910A | 50×72×22 |
| NA4910 | 50×72×22 |
| NA4911A | 55×80×25 |
| NA4911 | 55×80×25 |
| NA4912A | 60×85×25 |
| NA4912 | 60×85×25 |
| NA4913A | 65×90×25 |
| NA4913 | 65×90×25 |
| NA4914A | 70×100×30 |
| NA4914 | 70×100×30 |
| NA4915A | 75×105×30 |
| NA4915 | 75×105×30 |
| NA4916A | 80×110×30 |
| NA4916 | 80×110×30 |
| NA4917A | 85×120×35 |
| NA4917 | 85×120×35 |
| NA4918A | 90×125×35 |
| NA4918A/C9 | 90×125×35 |
| NA4918 | 90×125×35 |
| NA4919A | 95×130×35 |
| NA4919 | 95×130×35 |
| NA4920A | 100×140×40 |
| NA4920 | 100×140×40 |
| NA4920A/C9 | 100×140×40 |
| NA4922A | 110×50×40 |
| NA4922 | 110×50×40 |
| NA4924A | 120×165×45 |
| NA4924/YA | 120×165×45 |
| NA4924A/C3 | 120×165×45 |
| NA4924A/C9 | 120×165×45 |
| NA4924 | 120×165×45 |
| NA4926A | 130×180×50 |
| NA4926 | 130×180×50 |
| NA4928A | 140×190×50 |
| NA4928 | 140×190×50 |
| NA5903 | 17×30×18 |
| NA5917 | 85×120×46 |
| NA698A | 8×19×11 |
| NA6900A | 10×22×22 |
| NA6901A | 12×24×22 |
| NA6901 | 12×24×22 |
| NA6902A | 15×28×23 |
| NA6902 | 15×28×23 |
| NA6903A | 17×30×23 |
| NA6903 | 17×30×23 |
| NA6904A | 20×37×30 |
| NA6904 | 20×37×30 |
| NA69/22 | 22×39×30 |
| NA6905A | 25×42×30 |
| NA6905 | 25×42×30 |
| NA69/28 | 22×39×30 |
| NA6906A | 30×47×30 |
| NA6906A/C9 | 30×47×30 |
| NA6906 | 30×47×30 |
| NA4005 | 25×47×22 |
| NA4006 | 30×55×25 |
| NA4007 | 35×62×27 |
| NA4008 | 40×68×28 |
| NA4009 | 45×75×30 |
| NA4010 | 50×80×30 |
| NA4011 | 55×90×35 |
| NA4012 | 60×95×35 |
| NA4013 | 65×100×35 |
| NA4014 | 70×110×40 |
| NA4015 | 75×115×40 |
| NA4016 | 80×125×45 |
| NA4017 | 85×130×45 |
| NA5009 |
|
| NA4120 | 100×165×65 |
| NA5807X3 | 35×40×50 |
| NA5808X3 | 40×45×55 |
| NA6804X2 | 20×32×20.5 |
| NA6805X2 | 25×37×20.5 |
| NA6806X2 | 30×42×20.5 |
| NA6807X2 | 35×47×20.5 |
| NA6808X1 | 40×55×30 |
| NA6808X2 | 40×52×20.5 |
| NA6810X3 | 50×58×25.5 |
| NA4900X2 | 10×22×12.5 |
| NA4908X1A | 40×65×22 |
| NA4911X1A | 55×85×25 |
| NA4911X2 | 55×72×35 |
| NA4916X2 | 80×110×35 |
| NA59/22X3A | 22×40×25 |
| NA5911X3 | 55×78×30 |
| NA4209X3A | 30×70×18.5 |
| NA4207X3 | 35×58×22 |
| NA6/13 | 13×32×20 |
| NA6/17.47 | 17.47×28.5×12.5 |
| NA6/44.5 | 44.5×58.7×19 |
| NA6/50.8 | 50.8×65×22.2 |
| NA6/22.5/C2 | 22.225×40×25.4 |
| NA6/245 | 245×280×36 |
| NA6/245A | 245×280×36 |
| NA4901WB-2LS | 12×24×13/14 |
| NA6/92WB-2LS | 92×117×20 |
| NKI10/16 | 10×22×16 |
| NKI10/20 | 10×22×20 |
| NKI12/16 | 12×24×16 |
| NKI12/20 | 12×24×20 |
| NKI15/16 | 15×27×16 |
| NKI15/20 | 15×27×20 |
| NKI17/16 | 17×29×16 |
| NKI17/20 | 17×29×20 |
| NKI20/16 | 20×32×16 |
| NKI20/20 | 20×32×20 |
| NKI203316 | 20×33×16 |
| NKI22/16 | 22×34×16 |
| NKI22/20 | 22×34×20 |
| NKI25/20 | 25×38×20 |
| NKI25/30 | 25×38×30 |
| NKI28/20 | 28×42×20 |
| NKI28/30 | 28×42×30 |
| NKI14287 | 28.575×47.625×32 |
| NKI30/20 | 30×45×20 |
| NKI30/30 | 30×45×30 |
| NKI32/20 | 32×47×20 |
| NKI32/30 | 32×47×30 |
| NKI35/20 | 35×50×20 |
| NKI35/30 | 35×50×30 |
| NKI38/20 | 38×53×20 |
| NKI38/30 | 38×53×3 |
| NKI40/20 | 40×55×20 |
| NKI40/30 | 40×55×30 |
| NKI42/20 | 42×57×20 |
| NKI42/30 | 42×57×30 |
| NKI45/20 | 45×62×25 |
| NKI45/35 | 45×62×35 |
| NKI45/35/C3 | 45×62×35 |
| NKI50/25 | 50×68×25 |
| NKI50/35 | 50×68×35 |
| NKI55/25 | 55×72×25 |
| NKI55/35 | 55×72×35 |
| NKI60/25 | 60×82×25 |
| NKI60/35 | 60×82×35 |
| NKI65/25 | 65×90×25 |
| NKI65/35 | 65×90×35 |
| NKI70/25 | 70×95×25 |
| NKI70/35 | 70×95×35 |
| NKI75/25 | 75×105×25 |
| NKI75/35 | 75×105×35 |
| NKI80/25 | 80×110×25 |
| NKI80/35 | 80×110×35 |
| NKI85/26 | 85×115×26 |
| NKI85/36 | 85×115×36 |
| NKI90/26 | 90×120×26 |
| NKI90/36 | 90×120×36 |
| NKI95/26 | 95×125×26 |
| NKI95/36 | 95×125×36 |
| NKI100/30 | 100×130×30 |
| NKI100/40 | 100×130×40 |
| NANFLV674 | 370×480×66 |
| NKIS35 | 35×58×22 |
| NKS40 | 40×55×22 |
| NK17/20 | 17×25×20 |
| NK18/16 | 18×26×16 |
| NA6907A | 35×55×36 |
| NA6908A | 40×62×40 |
| NA6909A | 45×68×40 |
| NA6910A | 50×72×40 |
| NA6911A | 55×80×45 |
| NA6911A/YA | 55×80×45 |
| NA6912A | 60×85×45 |
| NA6912A/YA | 60×85×45 |
| NA6913A | 65×90×45 |
| NA6914A | 70×100×54 |
| NA6915A | 75×105×54 |
| NA6916A | 80×110×54 |
| NA6917A | 85×120×63 |
| NA6918A | 90×125×63 |
| NA6919A | 95×130×63 |
| NA6919A/C3 | 95×130×63 |
| NA6920A | 100×140×71 |
| NA6920A/C3 | 100×140×71 |
| NA5003X1A | 17×34×24 |
| NA5004A | 20×42×30 |
| NA6005X2A | 25×47×36 |
| NA6006X3A | 30×56×42 |
| NA6008X1A | 40×65×50 |
| NA6009X1A | 45×72×40 |
| NA69/32 | 32×52×36 |
| NA6907 | 35×55×36 |
| NA6908 | 40×62×40 |
| NA6909 | 45×72×40 |
| NA6910 | 50×72×40 |
| NA6911 | 55×80×45 |
| NA6912 | 60×80×45 |
| NA6913 | 65×90×45 |
| NA6914 | 70×100×54 |
| NA6915 | 75×105×54 |
| NA6916 | 80×110×54 |
| NA6917 | 85×120×63 |
| NA6918 | 90×125×63 |
| NA6919 | 95×130×63 |
| NA6920 | 100×140×71 |
| NA6/101.6M | 101.6×171.45×133.35 |
| NA6035X3M | 175×260×195 |
| NA6/177.8Q1 | 177.8×224.475×161.925 |
| NA6/177.8M | 177.8×244.475×161.925 |
| NA6/177.8X3M | 177.8×257.175×196.85 |
| NA6936X3M | 180×260×215 |
| NA6/180 | 180×280×215 |
| NA6/180X2M | 180×280×215 |
| NA6/195M | 195×290×190 |
| NA6/206.375M/C4W26 | 206.375×285.75×222.25 |
| NA6/206.375M/W26 | 206.375×285.75×222.25 |
| NA6/206.375Q1 | 206.375×285.75×222.35 |
| NA6/206.375M1/C4 | 206.375×285.75×222.35 |
| NA6/206.375M | 206.375×285.75×222.35 |
| NA6008X3APR | 40×72×46 |