Abstract: To provide a connecting rod assembly and a bearing-equipped connecting rod both manufacturable easily and inexpensively, a connecting rod assembly 2 includes a plurality of separate rod segments 3A and 3B each having a big end portion 3a, a small end portion 3b and a shank portion 3c intervening between the big and small end portions 3a and 3b. The separate rod segments 3A and 3B are laminated together to provide a laminated rod structure 3, and a ring member 5 is press-fitted to each of the big and small end portions 3a and 3b of the respective separate rod segments 3A and 3B forming the laminated rod structure 3 to thereby integrate the separate rod segments 3A and 3B together. The ring member 5 defines an outer race of, for example, a shell type bearing 4 and this shell type bearing 4 is press-fitted in the big and small end portions 3a and 3b of the laminated rod structure 3 to thereby provide a bearing-equipped connecting rod 1.

Abstract: A rocking bearing is proposed which is low in cost. A raceway is formed on the inner periphery of an arcuate bearing ring. Rolling elements are received in pockets of a retainer provided opposite to the raceway. The bearing ring is formed by pressing a steel plate to reduce the cost and achieve light weight and compactness.

Abstract: The cam follower with roller according to the present invention includes a cam follower body having a roller supporting portion integrally formed therein, a supporting shaft of which both ends are fixed to the roller supporting portion, and a roller rotatably supported to the supporting shaft with a plurality of needle rollers interposed. At least one of the supporting shaft, needle roller and roller is formed of heat-resisting steel, and the both ends of the supporting shaft is caulked to be fixed to the supporting portion.

Abstract: To provide a connecting rod assembly and a bearing-equipped connecting rod both manufacturable easily and inexpensively, a connecting rod assembly 2 includes a plurality of separate rod segments 3A and 3B each having a big end portion 3a, a small end portion 3b and a shank portion 3c intervening between the big and small end portions 3a and 3b. The separate rod segments 3A and 3B are laminated together to provide a laminated rod structure 3, and a ring member 5 is press-fitted to each of the big and small end portions 3a and 3b of the respective separate rod segments 3A and 3B forming the laminated rod structure 3 to thereby integrate the separate rod segments 3A and 3B together. The ring member 5 defines an outer race of, for example, a shell type bearing 4 and this shell type bearing 4 is press-fitted in the big and small end portions 3a and 3b of the laminated rod structure 3 to thereby provide a bearing-equipped connecting rod 1.

Abstract: It is aimed to prolong the life of a rocker arm in which rollers are housed in a full type form between a ring and a pin from a viewpoint completely different from the idea of improving the material. It is proposed to suitably control the relation between clearances in circumferential and radial directions for the rollers housed in a roller housing space formed between the outer peripheral surface of the pin and the inner peripheral surface of the ring.

Abstract: A rocking bearing is proposed which is low in cost. A raceway is formed on the inner periphery of an arcuate bearing ring. Rolling elements are received in pockets of a retainer provided opposite to the raceway. The bearing ring is formed by pressing a steel plate to reduce the cost and achieve light weight and compactness.

Abstract: It is aimed to prolong the life of a rocker arm in which rollers are housed in a full type form between a ring and a pin from a viewpoint completely different from improvement in the material. It is proposed to suitably control the relation between clearances in circumferential and radial directions for the rollers housed in a roller housing space formed between the outer peripheral surface of the pin and the inner peripheral surface of the ring.

Abstract: A shell type needle roller bearing for a universal joint is provided which can eliminate radial gaps. A plurality of needle rollers are mounted in an outer ring which has a cylindrical portion adapted to be fitted in a bearing ring formed in a bifurcated piece of a yoke and having a bottom at one end. The cylindrical portion is formed by three arcuate wall portions having equal circumferential lengths to each other. When a trunnion of a universal joint is inserted into the shell type needle roller bearing, the arcuate wall portions are resiliently deformed radially outwardly through the needle rollers, so that the needle rollers are pressed against the outer circumferential surface of the trunnion by the recovering resilience. This prevents formation of radial gaps.

Abstract: A cage for a roller bearing which is free of fretting and abnormal noise, which can be manufactured at low cost, and which can be easily mounted in the bearing. The cage is formed by bending a metal sheet having pockets into a ring shape, temporarily joining its ends, heat-treating the ring thus formed to remove stress, and separating the temporarily joined portion. Such a cage tends to rotate slower than the raceway members on the driving side of the bearing, making it possible to reduce fretting. Such a cage can be used under high-temperature conditions.

Abstract: In a method of producing split bearings, comprising the steps of forming at least one of the two end surfaces of a bearing ring 1 with notches 2 being on a dividing line for splitting, and pressing the bearing ring 1 between upper and lower molds 4 and 5 along the dividing line on which the notches 2 are provided, the raceway surface 1a of the bearing ring 1 is ground in the shape of an ellipsoid which major diameter lies on the dividing line, and in that natural splitting is then effected.

Abstract: Roller tappet can be manufactured with less machining steps to reduce the manufacturing cost. The tappet case consists of two members, i.e. case member and yoke member for supporting a roller. These members are coupled together by fixing the top end of the yoke member to the bottom of the case member.

Abstract: A cage for a roller bearing which is free of fretting and abnormal noise, which can be manufactured at low cost, and which can be easily mounted in the bearing. The cage is formed by bending a metal sheet having pockets into a ring shape, temporarily joining its ends, heat-treating the ring thus formed to remove stress, and separating the temporarily joined portion. Such a cage tends to rotate slower than the raceway members on the driving side of the bearing, making it possible to reduce fretting. Such a cage can be used under high-temperature conditions.

Abstract: A rolling member which has improved strength and permits stable formation of oil films between its rolling surface and its mating surface and which shows a long life even under unfavorable lubricating conditions. The surface of the rolling member is subjected to heat treatment while nitriding. The rolling member is then treated to form minute recesses in its surface so that such surface has a surface roughness parameter RMS of not less than 0.10 .mu.m and a negative SK value. Thus, the surface strength of the rolling element increases and the oil film forming rate improves. The surface of the rolling member is less likely to suffer peeling damage and wear. Its life is prolonged.

Abstract: A needle roller bearing is directed to avoid a possibility that an inner peripheral surface of a bore in a housing may be ground or scraped by an edge defining a peripheral lip region of an opening in an outer race when a needle roller bearing is to be press-fitted into the bore in the housing and also to eliminate the need to adjust the position of a roller retainer while increasing a physical strength of the roller retainer. For this purpose, the outer race is formed with a first opening having a pair of axially spaced tabs bent so as to incline radially inwardly of the outer race from the remaining portion of the outer race. The roller retainer is in the form of a tubular member having a circumferentially continuous wall formed with a second opening at a location aligned with the first opening in the outer race. The roller retainer has a substantially intermediate portion protruding radially outwardly so as to have an outer diameter greater than that of any one of the opposite ends of the roller retainer.

Abstract: A needle roller bearing of a type empolying a generally cylindrical needle roller retainer of two-piece construction for supporting a plurality of needle rollers. The roller retainer is comprised of retainer segments each having opposite side edges. The retainer segments are connected together by means of at least one bond deposit filling up a gap between one of the opposite side edges of one of the retainer segments and a mating one of the opposite side edges of the other of the retainer segments, respectively. As a bonding material forming the bond deposit, a viscous material containing, as a principal component, vinyl acetate resin, or a hot-melt bonding material, both exhibiting a bondability lowering a high temperature, may be employed. When the needle roller bearing is in use, the bond deposit detaches from the gap or melt to separate the retainer segments from each other, allowing the separated retainer segments to function individually to minimize a fretting phenomenon.

Abstract: The present invention is directed to a roller follower for use with an engine. The roller follower incorporates a roller having a surface formed with minute recesses arranged at random so that the average value of the SK value is less than zero. Also, the ratio of the total area of the minute recesses to the entire area should be 10 to 40%.