INA Needle bearings for crank and piston pins

As INA bearing distributor, Nodes bearings have INA needle roller and cage assemblies in stock, including K, K..-ZW, KZK, KBK, and inch series C.

INA 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 INA 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 roller sort as well as the shaft and housing tolerances and can be adjusted by means of the needle roller sort.

The raceways must be hardened, ground and honed.

INA needle roller and cage assemblies for crank pins and piston pins

INA 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 little 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, undergo little wear, have high strength and their large guidance surfaces are designed for optimum lubrication.

INA 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 little clearance. Due to their small radial internal clearance, tilting of the connecting rod is reduced to a minimum.

They 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 low-wear steel cages are case hardened or quenched and tempered and have high strength.

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