FD系列
牙轮钻头掌片
钻头尺寸 | 钻头型号 | |
英寸(in) | 毫米(mm) | |
6 | 152.4 | 417/437/517/537/617/637/737/837 |
8 1/2 | 215.9 | 417/437/517/537/617/637/737/837 |
9 1/2 | 228.6 | 417/437/517/537/617/637/737/837 |
9 7/8 | 250.8 | 417/437/517/537/617/637/737/837 |
12 1/4 | 311.2 | 417/437/517/537/617/637/737/837 |