2. Apply a deforming force to the washer to deform the opening on the washer into a shape that can accommodate the non-circular flange of the sprocket body.

3. Insert the noncircular flange of the sprocket body into the above opening.

Wheat seeder is a kind of mechanical equipment that sows wheat seeds in the land through sowing mechanical system. It is an important tool to implement the mechanization technology of conservation tillage.

A sprocket is a kind of wheel with teeth embedded in it, which is used to mesh with a pulley at a precise pitch on a chain ring or cable. Sprockets are widely used in chemical industry, textile machinery, escalators, wood processing and other fields.