Abstract:
There is provided a cam follower in which a surface roughness of an outer surface of a roller of a cam follower which is in rolling contact with a cam of an engine is obtained individually in an axial direction and a circumferential direction, a skewness Rsk of a profile is formed to be negative, a core roughness depth Rk is made to be 0.3 or less, a reduced valley depth Rvk is made to be 0.3 or less, and a ratio Rk/Rt of the Rk to a maximum height Rt of the profile is made to be 0.19 or more.
Abstract:
The invention provides a cam follower having an outer ring which is used in a state where the cam follower comes into sliding contact or rolling contact with a mating part. The outer ring is configured such that the hardness of a surface layer portion existing between the surface and at least 3 μm below the surface is Hv 780 to 900, and the hardness of an internal surface portion existing at a depth of 10 μm or more from the surface is lower than the hardness of the surface layer portion and less than Hv 780. Such hardness can be obtained by performing soft shot blasting or flow barrel processing on a surface layer portion of a base material to be the outer ring.
Abstract:
A bearing apparatus includes: two split outer ring halves which are mounted to the housing; a plurality of rolling elements which are provided so as to roll on the two split outer ring halves; and a cage which holds the rolling elements such that the rolling elements are disposed at substantially equal intervals in a circumferential direction of the cage and which is split at a position of the cage to form joint surfaces, an outside diameter of the cage being guided by inner circumferential surfaces of the split outer ring halves. An outside diametrical dimension in a normal direction to the joint surfaces is made larger than an outside diametrical dimension of the cage in a direction parallel to the joint surface, and vicinity of an outside diametrical position of the cage lying in the normal direction is made to be guided by the outer ring halves.
Abstract:
A bearing apparatus includes: two split outer ring halves which are mounted to the housing; a plurality of rolling elements which are provided so as to roll on the two split outer ring halves; and a cage which holds the rolling elements such that the rolling elements are disposed at substantially equal intervals in a circumferential direction of the cage and which is split at a position of the cage to form joint surfaces, an outside diameter of the cage being guided by inner circumferential surfaces of the split outer ring halves. An outside diametrical dimension in a normal direction to the joint surfaces is made larger than an outside diametrical dimension of the cage in a direction parallel to the joint surface, and vicinity of an outside diametrical position of the cage lying in the normal direction is made to be guided by the outer ring halves.
Abstract:
A cam follower includes a roller on which a cam rolls. A material ratio Rmr (C) (C: a section level %) of an radially outer surface of the roller is set to relations of 0 %
Abstract:
A rocker arm bearing comprising a support shaft in which end faces of shaft end portions of the support shaft are crimped to inner circumferential edges of shaft end inserting holes in opposed side walls and an outer ring which is rotatably supported on a raceway portion at a shaft intermediate portion of the support shaft via a plurality of rollers or directly, wherein an external surface of the raceway portion at the shaft intermediate portion of the support shaft is surface hardened by virtue of quenching, and as a wear-resistant hard coating, a DLC coating is formed on at least the external surface of the raceway portion which is surface hardened.
Abstract:
An object is to provide a laminated polyimide substrate, and a method for the production thereof, in which various properties are ensured and/or provided by effectively controlling changes over time under stringent conditions, while ensuring sufficient adhesion between a polyimide film and metal layer. A laminated polyimide substrate comprises a polyimide layer, an alkali-treated layer derived from the polyimide layer, and a metal layer, arranged in that order, wherein the alkali-treated layer contains an anionic functional group, and is a laminated structure having a layer containing a metal catalyst arranged on the metal layer side and a layer containing a complex of the metal catalyst arranged on the polyimide layer side.
Abstract:
A cam follower includes a roller on which a cam rolls. A material ratio Rmr (C) (C: a section level %) of an radially outer surface of the roller is set to relations of 0%
Abstract:
An object is to provide a laminated polyimide substrate, and a method for the production thereof, in which various properties are ensured and/or provided by effectively controlling changes over time under stringent conditions, while ensuring sufficient adhesion between a polyimide film and metal layer.A laminated polyimide substrate comprising a polyimide layer, an alkali-treated layer derived from the polyimide layer, and a metal layer, arranged in that order, wherein the alkali-treated layer contains an anionic functional group, and is a laminated structure having a layer containing a metal catalyst arranged on the metal layer side and a layer containing a complex of the metal catalyst arranged on the polyimide layer side.