Abstract:
A plastic part is molded of a plastic with an inner body of crystalline plastic and an outer surface layer of an amorphous plastic. The amorphous surface layer withstands friction loading at least during an initial break-in period. In one embodiment, the amorphous surface is formed by using a higher plastic melt temperature and/or a lower mold temperature than normal. In another embodiment, an intermediate part is molded as a crystalline intermediate part, and a surface layer is heated and quenched to form the amorphous surface layer on the final part. A bearing cage is molded by injecting the plastic melt at a single point intermediate the ends of a single bar of the bearing cage to permit formation of the desired amorphous layer on rails connected to the ends of the bars.
Abstract:
A linear motion ball bearing (A) comprises a rail (1), a moving body (2) slidably fitted to the rail and a plurality of rolling bodies (4) disposed between the rail (1) and the moving body, and rolled and circulated with their relative sliding movement, wherein a solid film (16) of a fluorine-containing polyurethane polymer compound is formed at least at the rolling/sliding portions of the constituent elements. The molecules of this solid film (16) have a urethane bond and a three-dimensional net-like structure. Therefore, wear besides separation and peel-off is limited. In consequence, the suppression of dusting and the lubricity are improved, and a long life is achieved.
Abstract:
A sliding contact bearing, especially an aircraft landing gear trunnion bearing, comprises two bearing members (1, 3) composed of titanium or titanium alloy with cooperating sliding surfaces (2, 4), a first one of which is chromium plated and the second one of which is coated with nickel and fluorocarbon polymer. Preferably, the nickel coating is applied by an electroless plating process, and the fluorocarbon is infused into pores in the nickel plating. Preferably, the nickel and fluorocarbon coating is 0.025 to 0.041 mm thick, and has a hardness in the range 750-1000 VPN.
Abstract:
A bearing container of a synthetic resin, which can be injection molded out of a material obtained by mixing at least particles of a heat resisting resin with a thermoplastic resin, and which can thereby be manufactured at a low cost without compromise in suitability for high-rotational-speed and high-temperature applications.
Abstract:
An improved expansion tool (10) having a resilient wedge (24a) and (24b) held in the inner face (21a) and (21b) of an expandable jaw (18a) and (18b) for engaging a ram tongue (22) to expand the jaw (18a) and (18b). Each resilient wedge (24a) and (24b) has a surface which has a low coefficient of friction, is self-lubricating and which does not bind with the surface of the tongue (22) at high pressure, is angled to repeatedly engage the tongue (22) and communicate great pressure to the jaws (18a) and (18b) without the use of breakable or moving parts in the jaws (18a) and (18b), is comprised of a material resilient enough and is properly angled to cause the tongue (22) to disengage when the pressure is released, and is hard, dense, and resilient enough to repeatedly withstand great pressure without breaking.
Abstract:
A bushing can include a load bearing substrate having a first major surface, an adhesive film overlying the first major surface, and a friction reducing layer overlying the adhesive film. A method can include extruding an adhesive film, laminating a friction reducing layer to a load bearing substrate with the adhesive film therebetween to form a composite, and shaping the composite to form a bushing. The adhesive film can include a first adhesive layer, such as and a fluoropolymer layer. The adhesive layer can include a modified ethylene tetrafluoroethylene, and the fluoropolymer layer can include an ethylene tetrafluoroethylene.
Abstract:
A pinch roller device capable of running a tape stably through a sufficient automatic aligning action, wherein a circular sliding plate in correct with both upper and lower end faces of a sliding bearing is installed on a pinch roller shaft so that the inclination of the sliding bearing can be controled, assuming that an axial clearance A between the circular sliding plate in contact with the upper end face of the sliding bearing and the sliding bearing is A and the outside diameter of the circular sliding plate is B, the circular sliding plate and the sliding bearing are formed so that the relation, 0.007 /= 0.052, is established.
Abstract translation:一种能够通过足够的自动对准动作稳定地运行胶带的夹送辊装置,其中,在滑动轴承的上下端面正确的圆形滑板安装在压紧辊轴上,使得滑动轴承 可以控制,假定与滑动轴承的上端面接触的圆形滑动板与滑动轴承之间的轴向间隙A为A,圆形滑动板的外径为B,圆形滑板和 形成滑动轴承,使得建立了0.007 A / B = 0.06的关系,并且假设夹送辊轴与滑动轴承的滑动面之间的径向间隙为X,并且有效长度 滑动轴承的滑动面为Y,最好形成夹送辊轴和滑动轴承,使其关系X / Y> / = 0.052成立。
Abstract:
A composite journal and thrust bearing system having a bearing housing with a journal and a thrust face lined with a high performance polymer, such as a polyimide, that is useful in applications requiring loss of lubrication protection.
Abstract:
A friction-reducing abrasion resistant bearing material is described. The material comprises a monolithic, porous polytetrafluoroethylene (ePTFE) having dispersed therein a wear-resistant thermosetting or thermoplastic resin material.