The motor is completely enclosed and protected from dust. It also uses
moisture resistant copper wiring in the stator winding to provide longer
life. A dynamically balanced rotor and shaft provides vibration free
and quiet operation. The ball bearings of the unit are lubricated for
life and sealed to be protected from dust and dirt. The bearings never
have to be re-lubed. These models have two spindles. Units come with a
limited 3 year manufacturers warranty. Ships U.P.S.