How to choose drawing dies
| Item | Soft wire product | Hard wire product |
|---|---|---|
| Bell angle (α) | 70°±20° | 60°±20° |
| Approach angle (β) | 35°±5° | 30°±5° |
| Reduction angle (γ) | 18°±2° | 12°±2° |
| Bearing length (D) | 20-50 | 40-60 |
| Back relief angle(θ) | 15°±5° | 15°±5° |
| Exit angle (φ) | 50°±20° | 50°±20° |
| Size d(mm) | TOL(mm) | Max Non-Roundness(mm) | Case Size(mm) | ND | SMCD | PCD | TC |
|---|---|---|---|---|---|---|---|
| 0.007-0.020 | +0/-1.5%d | 0.5%d | 25×6 | ◎ | ◎ | ||
| 0.021-0.025 | +0/-0.0003 | 0.0002 | 25×6 | ◎ | ◎ | ||
| 0.026-0.040 | +0/-0.0004 | 0.0003 | 25×6 | ◎ | ◎ | ||
| 0.041-0.075 | +0/-0.0006 | 0.0004 | 25×8 | ◎ | ◎ | ◎ | |
| 0.076-0.100 | +0/-0.0008 | 0.0004 | 25×8 | ◎ | ◎ | ◎ | |
| 0.101-0.200 | +0/-0.0010 | 0.0010 | 25×8 | ◎ | ◎ | ◎ | ◎ |
| 0.201-0.600 | +0/-0.002 | 0.0015 | 25×10 | ◎ | ◎ | ◎ | ◎ |
| 0.601-1.200 | +0/-0.003 | 0.0020 | 28×10 | ◎ | ◎ | ◎ | ◎ |
| 1.201-2.000 | +0/-0.004 | 0.0025 | 28×12 | ◎ | ◎ | ||
| 2.001-3.500 | +0/-0.005 | 0.0030 | 30×15 | ◎ | ◎ | ||
| 3.501-5.500 | +0/-0.006 | 0.0035 | 35×20 | ◎ | ◎ | ||
| 5.501-8.000 | +0/-0.007 | 0.0040 | 43×27 | ◎ | ◎ | ||
| 8.001-10.000 | +0/-0.008 | 0.0045 | 43×27 | ◎ | ◎ | ||
| 10.001-12.000 | +0/-0.010 | 0.0050 | Custom | ◎ | ◎ | ||
| 12.001-15.000 | +0/-0.012 | 0.0060 | Custom | ◎ | ◎ | ||
| 15.001-18.000 | +0/-0.014 | 0.0070 | Custom | ◎ | ◎ | ||
| 18.001-22.000 | +0/-0.016 | 0.0080 | Custom | ◎ | ◎ | ||
| 22.001-75.000 | +0/-0.020 | 0.0100 | Custom | ◎ | |||
| >75.000 | Custom | Custom | Custom | ◎ |
Hard wire product
Stainless steel wire, copper plated steel wire, galvanized steel wire, brass plated steel wire tungsten wire ,. etc
Soft wire product
Copper wire, aluminum wire, brass wire gold wire ,. etc