摘要:
A cage is made of a low carbon steel and is for use in a rolling bearing which includes an outer ring, an inner ring and a plurality of rolling elements disposed rotationally between the outer ring and the inner ring. The cage includes a plurality of pockets for retaining the rolling elements in an equi-distribution in the rotating direction of the rolling elements. The low carbon steel is a steel containing from 0.02 to 0.10% by weight of C and from 0.10 to 0.45% by weight of Mn and is subjected to plastic working. The hardness for the pocket surface at least at a portion in contact with the rolling element is Hv 190 to 270, and the hardness for the core portion in the cage section is Hv 110 to 170.
摘要:
The contact portion of the end face of a conical roller, which is a portion to be slidingly contacted with a collar portion, is ground such that the outer contour line of the section thereof has a continuously curved line which passes through at least not only the first point but also between the third position and fourth position.
摘要:
A brass is a base material, and a material containing Mn and Si is cast to make a ring material. Ametallic structure in the cross section of the ring material is under a condition where an intermetallic compound Mn5Si3 is uniformly and finely scattered and precipitated in the base material (brass composed of &agr;- and &bgr;-phase). A machined retainer provided by matching said material has an excellent sizing precision, sound affect resistance.
摘要:
A cylindrical roller bearing comprises an inner race, an outer race, a plurality of cylindrical rollers disposed between the inner race and the outer race, and a cage disposed between the inner race and the outer race and provided with pocket portions in which the plurality of cylindrical rollers are respectively accommodated. The cylindrical roller bearing satisfies a following relations 1.5×10−3D≦H≦9.0×10−3D and A/B=0.6˜1.0 where D is a diameter of a cage circumferential surface of the cage which is either one of inner and outer circumferential surfaces of an axial end portion of the cage, H is a size of an annular clearance between the cage circumferential surface and a race circumferential surface which is either one of an outer race rib inner-diameter surface and an inner race rib outer-diameter surface opposite to the cage circumferential surface, A is an axial length of the cage circumferential surface and B is an axial length of the race circumferential surface. The bearing using a system for guiding the cage a roller guide system in which radial displacement of the cage is limited by engagement between each pocket and a corresponding roller. A roller guide surface of the cage is provided in a portion opposite to a linear-form portion at least except crowning portions in an axial direction of a roller rolling surface.
摘要:
In order to ensure high levels of insulation performance, and low cost, and have an excellent external appearance, as a ceramic constituting an insulating coating 6 being a ceramic coating layer, one with alumina as its main component, and in which the content of titanium oxide is limited to 0.01 to 0.2 percent by weight is used. Moreover, a particle size of ceramic forming the coating layer is 10 to 50 μm, and average particle size is 15 to 25 μm. By limiting the content of titanium oxide, the insulating coating 6 can be made thin, and by limiting the particle size the film thickness accuracy can be improved, thus simplifying finishing. Moreover, by mixing of titanium oxide, deterioration of the external appearance after sealing can be prevented. As a result, the above problem is solved.
摘要:
A roller bearing with a cage comprises an inner race and an outer race concentric with each other, a plurality of rollers interposed between the inner race and the outer race, and a cage for retaining these rollers. The cage comprises a pair of annular side plates disposed at the both ends of each of the rollers for supporting the rollers to be rotatable, and a plurality of pins each having its both ends respectively connected to connection portions of the pair of annular side plates. The parallel screw portions are respectively formed at the both ends of each of the pins and large-diameter portions each having a larger diameter than the parallel screw portions are respectively formed on the inner sides of the parallel screw portions on the both sides thereof. The circular recesses in which the large-diameter portions are respectively fitted are respectively formed on the inner sides of the pin connection portions of the pair of annular side plates.
摘要:
A roller bearing with a cage comprises an inner race and an outer race concentric with each other, a plurality of rollers interposed between the inner race and the outer race, and a cage for retaining these rollers. The cage comprises a pair of annular side plates disposed at the both ends of each of the rollers for supporting the rollers to be rotatable, and a plurality of pins each having its both ends respectively connected to connection portions of the pair of annular side plates. The parallel screw portions are respectively formed at the both ends of each of the pins and large-diameter portions each having a larger diameter than the parallel screw portions are respectively formed on the inner sides of the parallel screw portions on the both sides thereof. The circular recesses in which the large-diameter portions are respectively fitted are respectively formed on the inner sides of the pin connection portions of the pair of annular side plates.
摘要:
Disclosed herein is an electrolytic erosion preventing insulated rolling bearing and a manufacturing method thereof. In one embodiment, the electrolytic erosion preventing insulated rolling bearing includes an insulating coating being a ceramic coating layer including alumina as the main component and 0.01 to 0.2 percent by weight titanium oxide with the alumina having a particle size ranging from 10 to 50 μm and average particle size ranging from 15 to 25 μm.
摘要:
To provide a rolling bearing in which a spin slippage between a rolling element and a raceway groove is suppressed, and a rolling resistance is reduced to make the torque lower, whereby the rolling elements are easily incorporated even when the bearing rings are the monolithic type. Also, to provide the rolling bearing in which the rolling elements are easily incorporated even in a state where the bearing rings of monolithic type and a retainer are assembled. After the outer and inner races and the retainer are assembled, a small groove 4 for rotating the rolling element is provided in the center of an inner raceway groove 3 within a raceway groove space. The retainer 6 is only provided in one axial pocket face 7b of a pocket 7, and the other face is opened.
摘要:
The radii of curvature RD, RS and RL along a diagonal axis, a short side and a long side of an outer surface of a useful portion of a panel whose inner surface is provided with a phosphor screen satisfy RD≧10 m, RS>RD, and RL>RD. This makes it possible to provide a color picture tube that has an excellent visibility and is not susceptible to the deterioration in color purity due to doming, while including a shadow mask with excellent formability and strength.
摘要翻译:沿着对角线轴线,短边和外侧表面的长边的曲率半径R SUB,R S和R L 其内表面设置有荧光屏的面板的有用部分满足R SUB> =10μm,R S S / / SUB D R D, 和R L,R D,D和D。 这使得可以提供一种具有优异的可视性并且不会由于穹顶而导致的色纯度劣化的彩色显像管,同时包括具有优异成形性和强度的荫罩。