... drilling, boring and reaming on different materials, and screw diameter of M42X4, M48X3, M60X2.5, M70X2, and M80X1.The machine tool apply ... tap holder; 10. Foundation bolt;11. Hexagon nut; 12. Washer2.The machine tool applies to diameter within 31.5mm of drilling ... , boring and reaming on different materials, and pitch within 3mm.The machine tool apply cutting operation of single ...