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| Chain | No.120 | |
| Pitch | (P) | 38.10 mm |
| Internal Width | (W) | 25.40 mm |
| Roller Dia. | (Dr) | 22.23 mm |
| Teeth Width | (T) | 23.5 mm |
| Sprocket No. | Outside Dia.Do | Pitch Dia.Dp | Bore Dia. | Hub | Weight(kg) | ||||
| Type | Z | Stock Bore | Min. | Max | BD | BL | |||
| NK120B | 10 | 140 | 123.29 | 20 | 22 | 51 | 78 | 56 | |
| 11 | 153 | 135.24 | 20 | 22 | 60 | 91 | 56 | 4.0 | |
| 12 | 165 | 147.21 | 20 | 22 | 66 | 98 | 56 | 4.8 | |
| 13 | 177 | 159.20 | 20 | 22 | 66 | 98 | 56 | 5.3 | |
| 14 | 190 | 171.22 | 20 | 22 | 75 | 107 | 56 | 6.3 | |
| 15 | 202 | 183.25 | 20 | 22 | 80 | 117 | 63 | 7.8 | |
| 16 | 214 | 195.29 | 20 | 22 | 80 | 117 | 63 | 8.4 | |
| 17 | 227 | 207.35 | 20 | 22 | 80 | 117 | 63 | 9.1 | |
| 18 | 239 | 219.41 | 20 | 22 | 80 | 117 | 63 | 9.9 | |
| 19 | 251 | 231.48 | 20 | 22 | 80 | 117 | 63 | 10.7 | |
| 20 | 263 | 243.55 | 20 | 22 | 89 | 127 | 63 | 12.1 | |
| 21 | 276 | 255.63 | 20 | 22 | 89 | 127 | 63 | ||
| 22 | 288 | 267.72 | 26 | 28 | 89 | 127 | 63 | 13.4 | |
| 23 | 300 | 279.80 | 89 | 127 | 63 | 14.5 | 63 | ||
| 24 | 312 | 291.90 | 26 | 28 | 89 | 127 | 63 | 15.2 | |
| 25 | 324 | 303.99 | 26 | 28 | 89 | 127 | 63 | 16.2 | |
| 26 | 337 | 316.09 | 26 | 28 | 89 | 127 | 63 | 17.2 | |
| 28 | 361 | 340.29 | 26 | 28 | 95 | 137 | 71 | 20.9 | |
| 30 | 385 | 364.50 | 26 | 28 | 95 | 137 | 71 | 23.2 | |
| 32 | 410 | 388.71 | 26 | 28 | 95 | 137 | 71 | 25.7 | |
| 33 | 422 | 400.82 | 26 | 28 | 95 | 137 | 71 | 28.4 | |
| 34 | 434 | 412.93 | 26 | 28 | 95 | 137 | 71 | 29.0 | |
| 35 | 446 | 425.04 | 26 | 28 | 95 | 137 | 71 | 29.7 | |
| 36 | 458 | 437.15 | 26 | 28 | 95 | 137 | 71 | 32.0 | |
| 38 | 483 | 461.38 | 26 | 28 | 95 | 137 | 71 | 35.0 | |
| 40 | 507 | 485.60 | 26 | 28 | 103 | 147 | 80 | 38.2 | |
| 42 | 531 | 509.84 | 26 | 28 | 103 | 147 | 80 | 42.0 | |
| 45 | 568 | 546.19 | 26 | 28 | 103 | 147 | 80 | 47.6 | |
| 48 | 604 | 582.54 | 26 | 28 | 103 | 147 | 80 | 53.0 | |
| 50 | 628 | 606.78 | 26 | 28 | 103 | 147 | 80 | 58.0 | |

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Luotuo Industrial Area, Zhenhai District, Ningbo City, China
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