工业装订用双线圈
机器自动制作，当中不断齿，一根到底。各种规格齐全，黑、白色常年提供。
| 工业装订用双线圈，随剪随用，装订方便。 |
齿距 pitch | 型号 size | 内直经 coil diameter | 建议最大装订厚度recommended maximum book thickness | 每卷齿数 Each quantity loops |
3:1 | 1/4” | 6.4mm | 4.8mm | 80000 |
5/16” | 7.9mm | 6.4mm | 58000 | |
3/8” | 9.5mm | 7.9mm | 42000 | |
7/16” | 11.1mm | 9.5mm | 28000 | |
1/2” | 12.7mm | 11.1mm | 24000 | |
9/16” | 14.3mm | 12.7mm | 18000 | |
2:1 | 5/8” | 16.0mm | 14.3mm | 10000 |
3/4” | 19.0mm | 17.5mm | 7000 | |
7/8” | 22.0mm | 20.6mm | 4500 | |
1” | 25.4mm | 23.8mm | 3600 |
