Tungsten Carbide double helical hole round bars refer to round bars with two helical holes, and the helical angles are generally 15°, 40°, 45° and 60°. Hard alloy double helical hole round bar is a kind of alloy material with high hardness and strength, which is mainly made of tungsten carbide (WC), and other precious metals or binders are added and sintered by powder metallurgy method.
The process flow of hard alloy double helical hole round bars: powder making → formula according to application requirements → wet grinding → mixing → crushing → drying → sieving → then add forming agent → re-drying → sieving to obtain the mixed material → granulation → pressing → forming → low-pressure sintering → forming (blank)→ fine grinding by external cylindrical grinding (blank does not have this process)→ dimensional inspection → packaging → storage.
The application scope of hard alloy double helical hole round rods: They are widely used in the production and processing fields, such as micro-drill bits in the PCB industry, electrode rods in the optoelectronic communication industry, tungsten steel drill bits, drill holders, centers, push rods, wear-resistant precision parts in the mechanical processing industry, and are the preferred high-quality materials for integral CNC milling cutters and hole processing tools.
| 外径 |
外径公差 |
孔公差 |
孔间距 |
孔间距公差 |
孔偏离 |
螺距 |
角度公差 |
| Φ6.3 |
0～+0.3 |
±0.10 |
2.6 |
-0.40 |
0.15 |
32.65 |
-3.0～+3.0 |
15°±0.5°
30°±0.5°
45°±0.5°
60°±0.5° |
| Φ8.3 |
±0.15 |
4.0 |
-0.40 |
0.15 |
43.53 |
-4.5～+4.5 |
| Φ10.3 |
±0.15 |
4.8 |
-0.60 |
0.20 |
54.41 |
-4.5～+4.5 |
| Φ12.3 |
0～+0.4 |
±0.20 |
6.25 |
-0.80 |
0.30 |
65.30 |
-7.0～+7.0 |
| Φ14.3 |
±0.20 |
7.1 |
-1.0 |
0.37 |
76.18 |
-7.0～+7.0 |
| Φ16.3 |
±0.20 |
8.3 |
-1.0 |
0.40 |
87.06 |
-7.0～+7.0 |
| Φ18.3 |
0～+0.5 |
±0.25 |
9.55 |
-1.0 |
0.50 |
97.95 |
-7.5～+7.5 |
| Φ20.3 |
±0.25 |
10.40 |
-1.0 |
0.50 |
108.83 |
-7.5～+7.5 |
