needle bearing / radial / single-row / steel
K, KZW series Nadella



  • Rolling element:


  • Configuration:

    radial, single-row

  • Material:


  • Other characteristics:

    cage assembly, high-precision

  • Inside diameter:

    Min.: 4 mm

    Max.: 110 mm

  • Outside diameter:

    Min.: 7 mm

    Max.: 118 mm

  • Width:

    Min.: 7 mm

    Max.: 30 mm


Radial needle roller and cage assemblies have a steelcage that provides both inward and outward retentionfor the needle rollers. The designs provide maximumcage strength consistent with the inherent high loadratingsof needle roller bearings.Accurate guidance of the needle rollers by the cagebars allows for operation at high speeds. Needle rollerand cage assemblies have either one or two rows ofneedle rollers.Also listed are needle roller and cage assemblies usingmolded, one-piece glass-reinforced engineered polymercages (suffix TN). These operate well at temperatures upto 120° C over extended periods. However, care shouldbe exercised when these assemblies are lubricated withoils containing additives as service life may be reducedif the operating temperature exceeds 100° C. At suchhigh temperatures oil can deteriorate with time and it issuggested that oil change intervals are observed.