SciOptic Double ball bearing motor is an electric motor that consists of two ball-bearing-type bearings, with the inner races mounted on a common conductive shaft, and the outer races connected to a high current, low voltage power supply. An alternative construction fits the outer races inside a metal tube, while the inner races are mounted on a shaft with a non-conductive section (e.g. two sleeves on an insulating rod). This method has the advantage that the tube will act as a flywheel. The direction of rotation is determined by the initial spin which is usually required to get it going. SciOptic Double bearing motor is 1/4HP explosion proof . The motor assembly includes a 25' power cord and explosion proof ERLB. Easily adapted to most Gas Traps. We use a double bearing this more then doubles the life of the motor. Once the bearings are worn send us back the unit and we can replace the bearing for you.