车床各生产厂对其产品能钻孔的最大尺寸均无任何规定。这对车床很不利,因钻孔的切削扭矩过大时,钻头便在尾座套筒内打滑,锥孔表面严重研伤;尾座紧固后,若尾座与导轨间的紧固力小于钻削轴向力,尾座便向后滑移,若再加大紧固力,压板又易断裂。所以笔者认为,生产厂应对普通车床所能 The lathe manufacturers do not have any rules on the maximum size of their products that can be drilled. This is very detrimental to the lathe, drill cutting torque is too large, the drill will slip in the tailstock sleeve, tapered surface serious research injury; Tailstock fastening, if the tailstock and rail fastening force is less than the drill Cutting axial force, tailstock will slip backwards, if we increase the fastening force, the pressure plate and easy to break. So I believe that the production plant to deal with ordinary lathe can