The invention relates to a tooth alignment and
hobbing clamp for an octagonal
blind hole. An inner
quadrilateral core is arranged at the center of the clamp, a sheath is sheathed on the periphery of the inner
quadrilateral core, a
gasket is further sheathed outside the sheath, a connecting seat is arranged below the
gasket, a screw hole is formed on the
gasket, a boss of the connecting seat is connected through a countersunk head screw, and a bolt through hole for fixing with a
machine tool is arranged on the connecting seat. The top end surface of the inner
quadrilateral core protrudes from the top end surface of the sheath and the gasket. The
diameter of the outer circle of the gasket is the same with that of a bulge of the connecting seat. The inner quadrilateral core, the sheath, the gasket and the connecting seat are coaxial. According to the tooth alignment and
hobbing clamp disclosed by the invention, a workpiece is centered by an inner octagonal core, an inner hole of a base is used for positioning, the position of a cutter can be adjusted conveniently for realizing alignment between the octagonal
blind hole and tooth shape, the inner octagonal core and an upper
finial are used for driving the workpiece to rotate, the clamping is convenient, and a mechanism is simple but very practical.