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NeedlerollerbearingsforConnectingRod.pdf
Needle roller and cage assemblies for crank pins and piston pins
Features
Needle roller and cage assemblies for connecting rod bearing arrangements are used in the crank mechanisms of 2 and 4 stroke engines as well as in compressors for supporting crank pins and piston pins. They consist of cages equipped with needle rollers, support high centrifugal and acceleration forces and are suitable for high speeds.They require very little radial space since the radial section height only corresponds to the diameter of the needle rollers. They give bearing arrangements with high runout accuracy which is, however, influenced by the geometrical accuracy of the raceways. The radial internal clearance is dependent on the needle sort as well as the shaft and housing tolerances and can be adjusted by means of the needle roller sort.
Needle roller and cage assemblies for crank pins
Needle roller and cage assemblies for crank pins are externally guided, which means that the connecting rod bore guides the cage radially with defined clearance. The radial movement of the cage in relation to the connecting rod bore and the rolling elements is as small as possible. The cages are made from quenched and tempered steel, have good wear resistance, exhibit high strength and their large, guidance surfaces are designed for optimum lubrication.
Needle roller and cage assemblies for piston pins
Needle roller and cage assemblies for piston pins are internally guided, which means that the piston pin guides the cage radially with defined clearance. Due to their small radial internal clearance, tilting of the connecting rod is reduced to a minimum. The needle roller and cage assemblies support high frequency oscillating loads and are available for the majority of piston pin diameters in various widths, in accordance with the piston boss spacing. The steel cages are case hardened or quenched and tempered, exhibit good wear resistance and have high strength.
Features
Needle roller and cage assemblies for connecting rod bearing arrangements are used in the crank mechanisms of 2 and 4 stroke engines as well as in compressors for supporting crank pins and piston pins. They consist of cages equipped with needle rollers, support high centrifugal and acceleration forces and are suitable for high speeds.They require very little radial space since the radial section height only corresponds to the diameter of the needle rollers. They give bearing arrangements with high runout accuracy which is, however, influenced by the geometrical accuracy of the raceways. The radial internal clearance is dependent on the needle sort as well as the shaft and housing tolerances and can be adjusted by means of the needle roller sort.
Needle roller and cage assemblies for crank pins
Needle roller and cage assemblies for crank pins are externally guided, which means that the connecting rod bore guides the cage radially with defined clearance. The radial movement of the cage in relation to the connecting rod bore and the rolling elements is as small as possible. The cages are made from quenched and tempered steel, have good wear resistance, exhibit high strength and their large, guidance surfaces are designed for optimum lubrication.
Needle roller and cage assemblies for piston pins
Needle roller and cage assemblies for piston pins are internally guided, which means that the piston pin guides the cage radially with defined clearance. Due to their small radial internal clearance, tilting of the connecting rod is reduced to a minimum. The needle roller and cage assemblies support high frequency oscillating loads and are available for the majority of piston pin diameters in various widths, in accordance with the piston boss spacing. The steel cages are case hardened or quenched and tempered, exhibit good wear resistance and have high strength.