Asymmetric special hob

The utility model belongs to the field of hobbing cutter technology application equipment, and particularly relates to an asymmetric special hobbing cutter which comprises a hobbing cutter body, the hobbing cutter body comprises a cutter shaft, two bearings are arranged on the periphery of the cutter shaft, and the two bearings are arranged left and right and correspond to a first tapered roller bearing and a second tapered roller bearing respectively. The hob body further comprises a three-blade cutter body which is matched with the peripheries of the two bearings in a matched mode, the outer diameter of the three-blade cutter body is sequentially increased from left to right, an oil seal assembly is arranged between the second tapered roller bearing and the cutter shaft, and a floating seat is arranged on the periphery of the oil seal assembly. A connecting end cover is arranged on one side of the first tapered roller bearing, an oil seal assembly is also arranged between the connecting end cover and the fi