Abstract: A workpiece cleaning mill that is useful for cleaning castings includes a hollow housing that is established by arranging plural elongated manganese flights side-by-side to establish a cylinder, and attaching the flights to opposed entrance and exit rings. A feed conveyor feeds workpieces into the entrance end, and an exit conveyor conveys the workpieces away from the exit end. Media throwers are disposed at each end to throw high-speed cleansing media, such as shot, into the housing. The housing is rotated as the workpieces move, under the influence of gravity and/or following workpieces being fed into the housing, from the entrance end to the exit end while being bombarded with shot. Steel mesh curtains at each end block the media from passing outside of the mill. Spent media falls through perforations in the flights, and the spent media is conveyed back to a media hopper and thence to the media throwers for reuse. Magnetic valves regulate the amount of media thrown by the throwers.

Abstract: An improved airless blast cleaning wheel and housing. The improved cleaning wheel utilizes axially loaded blade holding slots which, through centrifugal force, as the wheel is rotated secure replaceable impeller blades without the use of spring retainers and the like. An improved housing employs a removable front access plate for gaining access to the wheel and related components and incorporates primary and secondary seals to protect a direct drive motor mounted on the housing.

Abstract: An airless centrifugal blast device in the form of a one piece, two-bladed wheel mounted for rotational movement about either a horizontally or vertically disposed axis and means for off center gravitational feed of particulate media to the inner end portions of the blades with the particulate media feed tube means tapering in cross section to the discharge opening and extension of the discharge opening in the direction of rotation of the wheel.

Abstract: An airless centrifugal blast device in the form of a one piece, two-bladed wheel mounted for rotational movement about either a horizontally or vertically disposed axis and means for off center gravitational feed of particulate media to the inner end portions of the blades with the particulate media feed tube means tapering in cross section to the discharge opening and extension of the discharge opening in the direction of rotation of the wheel.