A spindle device (10) includes a rotating shaft (12) having a plurality of turbine blades (11) provided in a circumferential direction, a housing configured to accommodate therein the rotating shaft (12), and a gas bearing (40) mounted to the housing (20) and configured to float and support the rotating shaft (12) to the housing (20) in a contactless manner by supply of a gas. The rotating shaft (12) is configured to be rotatively driven by jetting gas to the plurality of turbine blades (11). The plurality of turbine blades (11) overlaps the gas bearing (40) in an axial direction. Therefore, there is provided the spindle device having a flat configuration in which an axial length is short and capable of implementing miniaturization and weight saving.

A bearing assembly for a blender jar assembly includes a blender jar having a bottom wall that defines an opening. A retainer is positioned within the blender jar and defines a receiving space in communication with the opening. A jar collar is positioned exterior of the blender jar and is operably coupled with the retainer. A bearing housing is positioned within the receiving space and is spaced apart from the retainer by a first spacing. A nut is operably coupled with the bearing housing and is at least partially received by the receiving space. The nut is spaced apart from the retainer by a second spacing. A gasket is positioned to maintain at least one of the first and second spacings of the bearing housing and the nut relative to the retainer.

An apparatus includes a screen basket and a drive system coupled to the screen basket. The drive system includes a motor and a drive having a drive shaft. The drive system imparts a gyratory motion to the screen basket. First and second eccentric masses are coupled to the drive shaft. A method includes coupling the drive system to the screen basket of a sifter; the first eccentric mass positioned a distance above the second eccentric mass. The first and second eccentric masses are rotated together. The masses of the first and second eccentric masses are provided and/or adjusted so that a summation of forces generated by rotating the first and second eccentric masses generates a force line in plane with a center of gravity of the sifter. Rotation of the eccentric weights may move a distal end of a first and/or second weight arm a vertical distance upward.

An annular gap space (18), into which a part of turbine air for driving a turbine (6) and exhaust air discharged from a rear thrust air bearing (12) flow out, is provided between an inner peripheral surface (5B) of a rotational shaft (5) and an outer peripheral surface (17B) of a feed tube (17). Air outflow holes (25) are provided in the rotational shaft (5) to be positioned between a radial air bearing (8) and a rotary atomizing head (16) and to be radially bored through the rotational shaft (5). As a result, the exhaust air flowing in the annular gap space (18) flows out outside of the rotational shaft (5) from the air outflow holes (25) in a position behind the rotary atomizing head (16).

A system for monitoring bearing wear in a circular clarifier drive is provided. The system includes a drive motor comprising at least one gear operatively coupled to at least a bridge platform, skimmer, and header of the circular clarifier drive. The at least one gear is rotatable within a housing of the circular clarifier drive on a plurality of bearings positioned therebetween. The system further includes at least one sensor constructed and arranged to measure a gap between at least one stop block of the housing and the at least one gear and determine if the measured gap is within a predetermined range. Methods of retrofitting a circular clarifier drive including a drive motor operatively coupled to at least one gear disposed within a housing and a plurality of bearings positioned between the at least one gear and the housing are also provided.

An exciter apparatus for a vibrating machine having an exciter body being configured to accommodate a lubricant. The exciter apparatus further has a first bearing comprising an inner bearing portion and an outer bearing portion separated by a number of rollers located in a gap between the inner bearing portion and outer bearing portion. A first shaft is rotatably connected to the exciter body by means of the first bearing. The first shaft has eccentric masses. The first bearing seat and the outer bearing portion comprising a through hole allowing a fluid to flow through the first bearing seat and the outer bearing portion into the gap, The exciter apparatus further comprising a lubricant provision means configured to provide a lubricant from the lubrication zone to the through hole.