Abstract: The end surface 2e of the press-fit portion 2c of the axle 2 is machined with high precision to serve as a reference surface for measuring the negative bearing clearance upon completion of the assembly. The inner ring 3 is press-fitted on the press-fit portion 2c of the axle 2 and is fixed in position by the nut 6 screwed on the threaded portion 2d of the axle 2. In this axle bearing assembly, the inner ring 3 abuts against the shoulder portion 2d of the axle 2 with no clearance defined therebetween, and the negative bearing clearance is assured.

Abstract: The rolls of high-pressure roll presses for the compressive size reduction of granular material are hard surfaced with nub pins which are wear-resistant and suitable for autogenous wear protection. The nub pins, which have a long potential service life even under the action of high compressive loads, have a radially inner pin part (13) which is easily welded to the roll surface (12) and a radially outer harder pin part (14) protectively covering the radially inner pin part.

Abstract: In a process for producing a shaft bearing-bearing housing assembly wherein the shaft bearing has an outer race firmly engaged in the bearing housing, a shaft bearing with a slightly conical outer surface is fitted into a slightly conical receiving bore formed in the bearing housing at an elevated temperature which is higher than the normal operating temperature of the bearing housing and the bearing housing is then permitted to cool down thereby providing for firm engagement of the shaft bearing outer race in the bearing housing.

Abstract: Apparatus for mounting a mill roll on a mill drive shaft in which mounting concentricity is produced by the internal expansion of the drive shaft to engage the bore of the mill roll. A secondary clamping device provides additional lateral binding force on the mill roll necessary for the production of the required frictional forces for the transmission of driving torque from the shaft to the mill roll.

Abstract: A method and device for establishing the correct amount that a bearing should be driven up a shaft involves measuring the strain on at least one of the side faces of the bearing ring through use of a sensor arranged on the side face of the bearing ring. The strain is measured while the bearing is being driven or moved along the shaft. The instantaneous bearing internal clearance reduction in the bearing can then be calculated from the measured instantaneous strain and the value for the known initial bearing internal clearance of the bearing.

Abstract: A method of reinforcing a sandwich panel having opposed first and second skins spaced apart by a core having a thickness "F" in a manner to preserve the spacing between the skins, including the steps of boring an in-line hole through the panel to provide a hole in both skins and the core of a diameter "A", enlarging the hole in the first skin to a diameter "B", inserting a tubular sleeve into the in-line hole, the sleeve having a length substantially equal to "F" and having an external diameter greater than "A" and slightly less than "B", the first end of the sleeve contacting the inner surface of the second skin, and flaring the second end of the sleeve to an external diameter greater than "B" so that it engages the inner surface of the first skin, and inserting a bolt through the sleeve, the bolt having a head to contact the external surface of the first skin and applying a nut to the bolt to contact the external surface of the second skin so that the skins are held in fixed position by the bolt.

Abstract: An electric-motor fuel pump that includes a housing with a fuel inlet and a fuel outlet, and an electric motor with a rotor responsive to application of electrical power for rotating within the housing. A pump mechanism includes an impeller coupled to the rotor for corotation with the rotor and having a periphery with a circumferential array of impeller vanes. A pair of plates oppose the sides of the impeller and a split ring surrounds the periphery of the impeller to form an arcuate pumping channel around the periphery of the impeller. Inlet and outlet ports at opposed ends of the pumping channel are operatively coupled to the inlet and outlet in the pump housing. Channels extend radially inwardly from the pockets in each side face of the impeller, and are interconnected by through-passages that extend through the impeller. A vapor vent is disposed in one of the side plates for sequential registry with the impeller through-openings for venting vapor from the pumping channel.

Abstract: A ball bearing is assembled by evenly spacing the balls through the pressurized air which is directed axially to the balls from a plurality of nozzles and agitated by an agitating plate provided adjacent the balls on the side remote from the nozzles, such that the balls are circumferentially moved before evenly spaced apart from each other.

Abstract: A method of removing a metal plug from a conduit includes the steps of simultaneously applying a static pull force and repetitive impulses to the plug. The method is particularly suited to removing a plug from a heat exchanger tube in a nuclear powered steam generator. A tool for practicing the method on such plugs includes a first hydraulic actuator for first moving an expansion member out of engagement with an interior plug wall, a second hydraulic actuator capable of attachment to the plug for applying a static pull force to the plug, and an arrangement connecting an air impact tool to the second hydraulic actuator for applying, simultaneously with the static force, high-frequency impulses to the plug entirely through solid members.

Abstract: Metal inking rolls, particularly for flexographic printing, having: A roll structure composed of an ammonia hardenable steel, in particular stainless steel, the selection of a roll wherein the minimum thickness of the wall, if tubular, is a direct function of the diameter and an inverse function of the length of the roll, so that, when the roll is supported at its ends and stressed in the middle, on a surface relatively distributed, it may be permanently distorted in the axial direction but without distorting its cross-section; a post-engraving ionic nitriding treatment to increase the surface hardness of the screen to at least 60 HRC and a final straightening step, to reduce the screen eccentricity at least 0.02 mm.

Abstract: Hollow ball bearings of improved strength and uniformity are produced by causing identical first and second hemispheric units to rotate at different speeds in facing relationship upon a common axis, and forcing the hemispheres into aligned contact. The frictional heat generated by such contact melts the material adjacent the open rim of each contacting hemisphere. The molten material is distributed by centrifugal force about the interior of the hemispheres. The speeds of the two hemispheres are then equalized with attendant cooling and re-solidification of the molten material, thereby producing a hollow sphere.

Abstract: A method for fabricating and installing a split riding ring for use on rotary cylinders that eliminates the need to remove associated equipment from the rotary cylinders to repair and install a new riding ring. The apparatus consists of a riding ring forged in one piece and machined and stress relieved. Both sides of the annular ring are then provided with opposing side pockets. Side plates are positioned within the side pockets and held in place by a first set of bolts located within drill and tapped holes. Holes are drilled through the side pockets, side plates and the riding ring. The side plates are removed and the one piece ring is cut at a forty five degree angle with its central axis of rotation to form a first and second segment and shims are attached to both segments to compensate for the metal loss. A second set of bolts are inserted through the holes in the side pockets and the side plates to form a body bound fit and the completed split ring assembly.

Abstract: For use in replacing a bearing in a machine that has a body, a shaft extending from the body, a bearing by which the shaft is mounted to the body, a wheel mounted on the shaft outside the body for rotation with the shaft, and a belt passing circumferentially around the wheel and exerting on the wheel a force that is perpendicular to the shaft, a fixture that includes a base, first means for attaching the base to the body of the machine, second means connected to the base for applying a counterforce to the wheel equal in magnitude and opposite in direction to the force exerted by the belt, and third means connected to the base for supporting the wheel in a fixed position with respect to the body of the machine after the counterforce has been applied and while the bearing is being replaced.

Abstract: The slow production rates associated with cutting machines for cutting extruded metal tubing to length are avoided in an apparatus that continually cuts extruded metal tubing (46) and which include a reel (44) for providing a coil of (42) of metal tubing (46) to a cutting nip defined by rollers (66) carrying scoring knives (68). The tubing is continuously moved through the nip by a continuously operated set of feeding rolls (70) and then passed to a set of pull rolls (74) which are driven at a more rapid rate to place the tubing (46) in tension to cause it to be severed where scored. Also disclosed is a method of continuously cutting extruded metal tubing.

Abstract: A guide roll having means to expand or contract independent of its support bearings to prevent bearing failures when used under elevated temperature conditions.

Abstract: A device for repairing a cylinder in a printing machine while the cylinder is installed in the printing machine. The device includes a cross slide rail having a base body with longitudinal guides, a longitudinal support slidably mounted on the longitudinal guides, and a transverse support connected to the longitudinal support. The cross slide rail is removably mounted to side walls of the printing machine so as to be parallel to a longitudinal axis of the cylinder to be repaired. A pull spindle is rotatably mounted to the base body and operatively connected to the longitudinal support so that the rotation of the pull spindle moves the longitudinal support along the longitudinal guides of the base body. A tool holder is connected to the transverse support for carrying a tool for working the cylinder. A mechanism for driving the cylinder is also provided.

Abstract: A method for making double-wall airfoil for applications such as the blades and vanes of gas turbine engines by depositing an airfoil skin over an inner support wall which is separately formed and contains channels filled by a channel filling means. The channel filling means is removed thereby forming integral channels within the double-wall for circulating a cooling gas adjacent to the airfoil skin. The airfoil skin deposited may be a metal alloy skin or a microlaminate structure, including microlaminate composite structures.

Abstract: A high vacuum sealing flange is formed of an outer housing with an insert which has, around its periphery, a blade formed on a inward-upward slant that cooperates with the inner wall of the housing to plastically deform a soft metal gasket when it is clamped between a similar flange. While designed primarily for rectangular flanges, the claimed invention may be used to make flanges of any desired shape.

Abstract: To provide a ball bearing that insures reasonable endurance and which reduces the necessary torque for rotation while causing less fluctuations in torque, a synthetic resin cage of the ball bearing for retaining a plurality of balls so as to roll freely is impregnated with a lubricating oil having a viscosity of 10 to 150 mm.sup.2 /s at 40.degree. C. in an amount of 0.1 to 1.0% by weight of the cage, a film of the lubricating oil is formed in a thickness of 0.03 to 20 .mu.m on the surfaces of an inner race, an outer race, balls and the cage, and the amounts of the oiliness agent and the rust inhibitor that are to be contained in the lubricating oils are limited to the specified ranges.

Abstract: A tube transfer device which includes a tube conveyor for transporting processed tubes from an entry location to an exit location thereon. The tube conveyor includes a plurality of first tube holders thereon which are adapted to hold the processed tubes so that axes thereof will extend parallel to one another and be laterally spaced apart a first distance from one another at the aforesaid entry location. A movable tube shuttle is provided for shifting processed tubes between a first position and a second position located adjacent the aforesaid entry location to the tube conveyor. The tube shuttle includes movable second tube holders adapted to receive the processed tubes when at the aforesaid first position and while maintaining a second distance between the processed tubes.