Industrial Bearing Adapter Sleeves make bearing mounting and demounting easier, and they frequently make bearing arrangement design simpler. The bearing will wear instead of the motor shaft because the metal in these bearings is considerably softer than the steel shaft of the motor. They are very effective and safe to use. Industrial Bearing Adapter Sleeves are frequently used in motors with fractional horsepower, are constructed of bronze, brass, or babbitt. To improve lubrication, graphite may be injected into the metal.