A disc harrow is a kind of working tool with a hoe set consisting of several concave disks fixed on a horizontal axis. It is mainly used to loosen the soil after plowing and to meet the agronomic requirements of land preparation before sowing. It is also used for weeding or shallow tillage and mites on harvested land. Heavy duty disc harrows can also be used for arable land operations. Whether cultivating soil or chopping weeds, disc harrows have to slice through a punishing mix of soil, dust and more. While in operation, disc harrow bearings must withstand exposure to heavy loads and shock loads. During washdowns, bearing seals need to keep water and detergents out, and lubricants in. General daily storage should be in a dry environment, and pay attention to the surface of anti-rust treatment, storage time is too long, should be timely increase the second anti-rust.