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我公司“OPEL”产品的横梁主轴材质为42CrMo,净重1673 kg。在用加长的φ23.5mm钻头钻深孔时,将其长度近200mm的前端断于深达980mm的孔内(图1)。
My company “OPEL” products beam spindle material 42CrMo, net weight 1673 kg. When drilling a deep hole with an extended φ23.5 mm drill bit, the front end of a length of nearly 200 mm is cut into a hole of a depth of 980 mm (FIG. 1).