The cutter head, also known as hammer head, is the main vulnerable part of the crushing shaft, and it is also the part that bears great impact force when crushing coal. There are castings and forgings on the market, but the castings bearing strength is small and the service life is short. Blade was covered a layer of wear-resisting layer forging and become, blade and blade both use a special fastening bolt and nut set, blade bolts and nuts with locking washers, when wear to a certain situation or cracks have appeared, should change in time, otherwise will make the blade are installed on the part of the blade is damaged, and can no longer be tighten blade on the blade holder. The broken shaft without cutting teeth will lose its balance, and the strong vibration will shorten the service life of the broken shaft sharply. Shuangzhi coal machine for many years focused on the scraper conveyor, transfer machine accessories, crusher accessories system repair, products sold to the major mining areas, more information please click on the official website of Shuangzhi coal machine or call to inquire the factory investigation