
60°、90°、120°直柄锥面锪孔(GB/T4258-2004)(mm) |
||||||
公称直径d1 |
小端直径d2 |
总长l1 α=60° |
总长l1 α=90°或120° |
钻体长l2 α=60° |
钻体长l2 α=90°或120° |
柄部直径d3 |
8 |
1.6 |
48 |
44 |
16 |
12 |
8 |
10 |
2 |
50 |
46 |
18 |
14 |
8 |
12.5 |
2.5 |
52 |
48 |
20 |
16 |
8 |
16 |
3.2 |
60 |
56 |
24 |
20 |
10 |
20 |
4 |
64 |
60 |
28 |
24 |
10 |
25 |
7 |
69 |
65 |
33 |
29 |
10 |