Abstract: A rotary sealing device to prevent the intrusion of coolant, grit and other unwanted material into operational bearings. Said device consists of a annular rigid body made of composite, plastic or metal material that is sealed to the rotating shaft with rubber-like o-rings. One or more flexible rings (similar to piston rings) are fitted into grooves on the outer periphery of the annular rigid body. The flexible rings compress to fit tightly in the housing or end cap of the unit containing the bearing to be sealed. Grease or similar liquid material in the grooves of the circular rigid body seal to the flexible rings, yet allow free rotation between the rings and the rigid body. Low friction allows high rotational speeds with little heat generation by the seal itself.

Abstract: A roller bearing assembly for both radial and axial loads comprises an annular series of hollow roller bearings within associated inner and outer annular bearing races. Each race has an integral end flange which projects generally radially toward the opposite race and which defines an axially inwardly facing parti-circular annular thrust surface. The flanges are arranged at axially opposite diagonal locations so that the thrust surfaces diagonally oppose each other in the axial direction. The roller bearings have parti-circular rim surfaces which engage the thrust surfaces and with the bearings preloaded both radially and axially enhanced stiffness and running accuracy is achieved. In a second form, annular recesses provide opposite end flanges on the roller bearings with enhanced axial flexibility. Bearing assemblies may be employed in axially adjacent pairs in machine tool spindles and the like.

Abstract: A hollow roller bearing has inner and outer races with the former provided with opposing axially spaced generally radially outwardly projecting shoulders. Roller bearings, hollow by diameter in the range 55% to 75% are disposed between the shoulders and in loose engagement with the inner and outer races during initial assembly. The bearings are thereafter pressed onto a shaft for preloading and assembly is thus completed. A method for making bearings involves the provision of the bearing as described with a loose assembly of the elements. The mounting method involves the press fitting of the loosely assembled elements on a shaft where upon preloading is achieved.

Abstract: A plurality of hollow rollers is located in the annular space between the inner and outer tapered raceways of a tapered bearing. Each hollow roller has an axial bore extending completely therethrough. The percent hollowness of each roller is uniform throughout its full length. The rollers may be preloaded between the races.

Abstract: This disclosure relates to a roller bearing assembly which, when used to support a shaft for rotation, unexpectedly greatly reduces the run-out of the shaft even as compared to previous super precisions roller bearings. It has been discovered that if hollow rollers are substituted in a roller bearing for solid rollers and the hollow rollers are positioned between an outer race and a shaft or inner race in a preloaded condition with the allowable flexure of the rollers being at least slightly greater than the variations in radial spacing between the races, the run-out of a shaft axis so supported is greatly reduced. Further, the life of such a bearing is greatly extended. In addition, less precisions rollers may be utilized.

Abstract: This disclosure relates to a full complement bearing and the method of forming the same wherein the rollers of the bearing are hollow and are installed between the bearing races in a preloaded condition. Further, the rollers have the end portions thereof relieved so that only the central portion of each roller is cylindrical. Such a roller bearing produces highly desirable and unexpected results. First, the runout of the bearing is at a minimum. In fact, utilizing lower grade components, a full complement hollow roller bearing formed in accordance with this disclosure will have the superior minimum runout of a much higher grade bearing utilizing solid rollers. In addition, the life expectancy of the full complement bearing is much greater than that of like full complement bearings having solid rollers.