Abstract: A desiccant device for preventing rotor bearings from rusting during nonuse is described which removes moisture from the air supplied to such bearings. The air supplied to the bearings is first transmitted through the desiccant device by connecting such device to the lubrication fittings of such bearings. The bearing breather desiccant device can be connected to electrical motors, pumps, gear reducers or other equipment having rotor bearing means which tend to rust during storage or other periods of nonuse when the lubricant drains away from the surface of such bearing. The desiccant can include a moisture indicator which changes color to indicate the amount of moisture absorbed by the desiccant so that the desiccant device can be replaced before it is no longer effective. The moisture indicator is viewed through a light transparent plastic bag containing such desiccant.