Novel hob

The utility model belongs to the field of shield tunneling machine cutter application equipment, and particularly relates to a novel hobbing cutter which comprises a hobbing cutter body, the hobbing cutter body comprises a cutter ring, a cutter hub, an end cover, a cutter shaft and a floating sealing ring, cooling devices are arranged above the two ends of the cutter shaft, grooves are formed in the outer circumference of the cutter ring, cutting teeth are formed in the outer circumference of the cutter ring, and the floating sealing ring is arranged on the cutter hub. The upper end of each cutting tooth comprises a diamond compact and an alloy ring which are arranged inside and outside, and diamond blocks are arranged on the two sides of each cutting tooth. The cooling device sprays cooling liquid to the cutter ring and the floating sealing ring to cool the cutter ring and the floating sealing ring, the sealing performance of the sealing ring is guaranteed, and the working progress is improved; the arc-shape