School Double Metal 3:1 And 2:1 Double Loop Binding Wires
Introdction:
The binding coil, also known as double coil, is suitable for binding all kinds of loose-leaf books, commemorative albums, desk calendars, exquisite picture albums, etc. We use high-quality environmentally friendly materials, bright color, strong adhesion, uniform hardness, good roundness when pressing the ring.
Applications:
Widely use for stationery items. such as reports,books,surveys,sales presentations, reference materials, training manuals, cookbooks,calendars, notebooks,proposals,summaries etc.
Specification:
| Inner Diameter | Wire Diameter (mm) | Pitch | Loops/Spool | Max Thickness (mm) | Approx Number of Sheet (80g) | |
| Large | Small | |||||
| 1/4" (6.4mm) | 0.7 | 3:1 | 99000 | 80000 | 4.8 | 45 |
| 5/16" (7.9mm) | 0.8 | 71700 | 58000 | 6.4 | 60 | |
| 3/8" (9.5mm) | 53400 | 42000 | 7.9 | 75 | ||
| 7/16" (11.1mm) | 0.9 | 38600 | 28000 | 9.5 | 85 | |
| 1/2" (12.7mm) | 30000 | 24000 | 11.1 | 100 | ||
| 9/16" (14.3mm) | 1 | 21500 | 18000 | 12.7 | 120 | |
| 5/8" (15.9mm) | 16800 | 14700 | 14.3 | 135 | ||
| 11/16" (17.5mm) | 14700 | 12300 | 15.9 | 150 | ||
| 3/8" (9.5mm) | 0.8 | 2:1 | 34100 | 27000 | 7.9 | 75 |
| 9/16" (14.3mm) | 1 | 14400 | 12000 | 12.7 | 120 | |
| 5/8" (15.9mm) | 1.1 | 12300 | 10000 | 14.3 | 135 | |
| 3/4" (19mm) | 1.2 | 8500 | 7000 | 17.5 | 165 | |
| 7/8" (22.2mm) | 6100 | 4500 | 20.6 | 180 | ||
| 1" (25.4mm) | 4500 | 3600 | 23.8 | 200 | ||
| 1-1/8" (28.6mm) | 1.4 | 3900 | 3000 | 25.4 | 230 | |
| 1-1/4" (31.8mm) | 2600 | 2000 | 28.6 | 245 | ||
| 1-3/8"(34.9mm) | 1.5 | / | / | 31.8 | 275 | |
| 1-1/2" (38.1mm) | / | / | 34.9 | 300 | ||
| 1-3/4" (44.5mm) | / | / | 38.1 | 365 | ||
