This ball bearing consists of an outer and inner race, balls, and shield. The primary purpose of this ball bearing is to allow the mandrel assembly to rotate. The mandrel assembly should move as smoothly as possible since the blade or spindle relies on this component to function. After extensive use, the ball bearing will fail. Typically, a broken ball bearing will squeal before it completely fails. If the warning noise is ignored, the bearing will eventually cease or break down completely. Often when the bearing completely fails, it will not only damage the mandrel but the mandrel housing as well. If so, a more expensive mandrel assembly replacement will be needed. The tools needed to replace a mandrel's ball bearing include a screwdriver set, nut driver, mallet, and wrench. It is recommended to remove the spark plug to prevent unintentional engine start-up. To reach the mandrel assembly, remove the spindle assembly from the body. Then, take out the carrier plate, guard, mounting assembly, and the pulley. This genuine ball bearing replacement will work with snowblowers, trimmers, tractors, and mowers made by Husqvarna, Weed Eater, Poulan, Craftsman, and Murray. This brand-new bearing is sourced from Husqvarna. It is sold individually.