This product is used for the transmission gearbox cutter beam of self-propelled locomotives and rotary disc lawnmowers. It is derived from European and American design concepts and inputs power through the locomotive engine. The transmission external gearbox drives the cylindrical gear to the cutter head. The cutter beam adopts a full gear structure design and the output speed is 3000 rpm. The transmission noise is low, and the quality is more stable and reliable; this cutter bar can be combined into different models to form a larger width. The working width can reach 3.2 meters to 5.5 meters, adapting to different needs. At the same time, the lawn mowing and flattening function can also be realized. It is used for harvesting alfalfa, safflower, and other crops. Flattening the stems will help to absorb water and spread them out for drying.