Sealing device for a wheel hub assembly provided with a rolling bearing, the sealing device being provided with a shield mounted on an outer ring of the bearing and with an annular cylindrical wall having an inner lateral surface mounted on an outer lateral surface of a collar of the outer ring; and with a sealing material fixed to the shield and defined by a pre-formed annular covering of polymer material, preferably but not necessarily rubber or thermoplastic material, formed independently and separately from the shield and mounted on the shield.

A cast for producing end plates for a pump assembly, the cast comprising a base portion and a pair of projections, the pair of projections providing material to machine bearing assembly housings for accommodating drive and idler shafts in the pump assembly. Also provided is an inner plate bushing for an end plate in a pump assembly, the inner plate bushing comprising a collar extending from a flange, the collar to be inserted into a mounting recess in the end plate with the flange seating flush with a surface of the end plate, the surface area of an end of the collar being larger than an inner surface of the flange.

A stator of a dry vacuum pump is provided, the pump having at least two rotors to rotate in a synchronised manner in opposite directions in a central housing to drive a gas to be pumped between a suction inlet and a delivery outlet, the stator including an outer part made of cast iron containing less than 5% nickel, and a stator insert wherein is arranged the central housing configured to receive the at least two rotors, the stator insert containing at least 10% nickel, the outer part of the stator having been cast on the stator insert. There is also provided a rotary shaft configured to bear and drive in rotation at least one rotor of a vacuum pump, a dry vacuum pump having at least one such stator and/or at least one such shaft, and a method for manufacturing such a stator and/or such a rotary shaft.

A bearing includes an inner ring and an outer ring arranged to face each other with a rolling element interposed therebetween, and a housing including a housing inner supported by the inner ring and a rotor flange supported by the outer ring. The rotor flange includes a pair of C-type retaining rings respectively arranged at one end surface side in an axial direction of the outer ring and at the other end surface side in the axial direction of the outer ring, groove portions extending in a circumferential direction and in which the pair of C-type retaining rings is respectively mounted, and first gap sealing members formed of a resin material and arranged in gaps between the C-type retaining rings and the respective end surfaces in the axial direction of the bearing, and gaps between the C-type retaining rings and the groove portions.

A sand casting apparatus, a method of forming a sand casting apparatus, and an automotive component are provided. The sand casting apparatus includes a sand casting base including a sand mold and/or a sand core having a base sand mixture, where the base sand mixture includes a sand material and a binder material. The sand casting apparatus further includes an outer layer disposed on the sand casting base. The outer layer includes silicon, magnesium, calcium, zirconium, manganese, carbon, aluminum, and iron. The automotive component has portions defining an aperture therein. The automotive component is formed of cast iron and has a nodular graphite structure from interior matrix to surface, where the nodular graphite structure on the surface is formed by a sand core having an outer layer that has reacted with the cast iron automotive component to form the nodular graphite structured surface.

A power tool includes a motor housing and a motor supported within the motor housing. The motor includes an output shaft defining an axis. The power tool also includes a bearing configured to support the output shaft for rotation about the axis, an end cap removably coupled to the motor housing, and a bearing retainer integrally formed with the end cap. The bearing retainer is configured to axially and radially secure the bearing to the end cap.

An automobile vehicle crankshaft including a crankshaft casting of a nodular iron. The crankshaft casting includes multiple main journals coaxially aligned on a common crankshaft casting axis. Multiple crankpin journals are fixedly connected to the main journals by individual webs. Multiple lightening holes have individual ones of the multiple lightening holes integrally formed within individual ones of the crankpin journals during casting. A bubble space is located proximate to a mid-portion of selected ones of the multiple lightening holes of the crankpin journals. The bubble space locally increases a passage size of the selected ones of the multiple lightening holes and reduces a mass of the individual ones of the crankpin journals.

A bearing unit structure includes a bearing and a bearing holding unit. The bearing rotatably supports a drive shaft. The bearing holding unit is provided to a crankcase so as to hold the bearing. A groove portion is formed on an inner peripheral surface a of the bearing holding unit, and the inner peripheral surface a faces the bearing. A thermal expansion correction band made of a resin is integrally formed with the bearing holding unit in a state of being embedded into the groove portion.

This exhaust cam shaft (2) is provided with a shaft part (5) and cam parts (6 to 13) provided on the outer circumference of the shaft part (5). The shaft part (5) has holes (16, 17, 19) opened at predetermined positions on the outer circumferential surface of the shaft part (5). The holes (16, 17, 19) are formed so as to be gradually tapered from an outside of the shaft part (5) toward a center of the shaft part (5) in a radial direction.

A sand casting apparatus, a method of forming a sand casting apparatus, and an automotive component are provided. The sand casting apparatus includes a sand casting base comprising a sand mold and/or a sand core comprising a base sand mixture, where the base sand mixture includes a sand material and a binder material. The sand casting apparatus further comprises an outer layer disposed on the sand casting base. The outer layer comprises silicon, magnesium, calcium, zirconium, manganese, carbon, aluminum, and iron. The automotive component has portions defining an aperture therein. The automotive component is formed of cast iron and has a nodular graphite structure from interior matrix to surface, where the nodular graphite structure on the surface is formed by a sand core having an outer layer that has reacted with the cast iron automotive component to form the nodular graphite structured surface.