钻头直径 |
3 7/8(98mm),4 1/2(114mm, 4 5/8(117.5mm), 5 1/4(133mm),
5 7/8(149.7mm),6(152mm),6 1/4(158mm),6 1/2(165mm),6 3/4(171mm),
7 1/2(190mm),7 7/8(200mm),8 1/2(215.9mm),8 3/4(222mm),9(228mm),
9 1/2(241.3mm),9 5/8(244.5mm),9 7/8(250.8mm),10 5/8(269mm),
11 5/8(295mm),12 1/4(311.1mm),13 5/8(346mm),14 3/4(374mm),
15 1/2(393mm),16(406mm),17 1/2(444.5mm)等 |