The double-pitch means the same parameters such as roller diameter,teeth width…etc, while the pitch is twice that of normal sprockets.
The advantage is, it can be used on double-pitch chains,At the same length, the weight of the chain is lighter than ordinary roller chains at the same length, and it is suitable for light-duty transmissions with large center distances at medium and low speeds, such as conveyors.
Type：R2042
Pitch=25.4
Teeth Width=7.20
Roller=Dia.15.875
| Z（Teeth No.） | OD(Outside Dia.) | dm(Hub Dia.) | A(Length through bore) |
| 10 | 93 | 55 | 40 |
| 11 | 102 | 61 | 40 |
| 12 | 108 | 69 | 40 |
| 13 | 118 | 78 | 40 |
| 14 | 127 | 84 | 40 |
| 15 | 135 | 92 | 40 |
| 16 | 143 | 100 | 40 |
| 18 | 159 | 100 | 40 |
| 20 | 176 | 100 | 40 |
| 24 | 208 | 110 | 50 |
| 25 | 216 | 110 | 50 |
| 26 | 224 | 120 | 50 |
| 28 | 241 | 120 | 50 |
| 30 | 257 | 120 | 50 |
Type：R2052
Pitch=31.75
Teeth Width=8.7
Roller=Dia.19.05
| Z（Teeth No.） | OD(Outside Dia.) | dm(Hub Dia.) | A(Length through bore) |
| 10 | 116 | 70 | 45 |
| 11 | 127 | 77 | 45 |
| 12 | 138 | 88 | 45 |
| 13 | 148 | 98 | 45 |
| 14 | 158 | 108 | 45 |
| 15 | 168 | 118 | 45 |
| 16 | 179 | 120 | 45 |
| 18 | 199 | 120 | 45 |
| 20 | 220 | 120 | 45 |
| 24 | 260 | 140 | 60 |
| 25 | 270 | 140 | 60 |
| 26 | 281 | 150 | 60 |
| 28 | 301 | 150 | 60 |
| 30 | 321 | 150 | 60 |
Type：R2062
Pitch=38.1
Teeth Width=11.6
Roller=Dia.22.225
| Z（Teeth No.） | OD(Outside Dia.) | dm(Hub Dia.) | A(Length through bore) |
| 10 | 140 | 45 | |
| 11 | 153 | 80 | 45 |
| 12 | 165 | 90 | 45 |
| 13 | 177 | 100 | 45 |
| 14 | 190 | 110 | 45 |
| 15 | 202 | 125 | 50 |
| 16 | 214 | 145 | 50 |
| 18 | 239 | 160 | 60 |
| 20 | 263 | 160 | 60 |
| 24 | 312 | 160 | 60 |
| 25 | 324 | 160 | 60 |
| 26 | 337 | 160 | 60 |
| 28 | 361 | 160 | 65 |
| 30 | 385 | 160 | 65 |
Type：R2082
Pitch=50.8
Teeth Width=14.6
Roller=Dia.28.575
| Z（Teeth No.） | OD(Outside Dia.) | dm(Hub Dia.) | A(Length through bore) |
| 10 | 187 | 115 | 65 |
| 11 | 204 | 125 | 65 |
| 12 | 220 | 135 | 65 |
| 13 | 237 | 145 | 65 |
| 14 | 253 | 145 | 65 |
| 15 | 269 | 145 | 65 |
| 16 | 286 | 145 | 75 |
| 18 | 319 | 160 | 75 |
| 20 | 351 | 180 | 75 |
| 24 | 416 | 180 | 75 |
| 25 | 433 | 180 | 75 |
| 26 | 449 | 180 | 75 |
| 28 | 481 | 180 | 85 |
| 30 | 514 | 180 | 85 |
