... Seals, or Axle Bearing. They are used in the bottom of the underpan. Usually be used in the automobile, machinery, trains, and ... , which is in the bottom of the Underpan. It's used to close the split drive axle and wheel reducer. The ... or the gear unit. They are used in automobile, electrical appliance, mechanical, industrial, trains, motorcycles, trucks, buses, and so on.1. Products ...