*** JTEKT (Formerly Koyo Brand) ***

Thrust Needle Roller - Cage & Roller Assembly (NTA)

• Thrust needle roller and cage assembly with inch nominal dimensions using needle rollers of the smallest practical diameter.

About Thrust Needle Roller And Cage Assemblies, Thrust Washer

• Dimensions for bore and O.D. of thrust assemblies and washers are nominal.
• Thrust washers burnished at least one - quarter of bore area (remainder is rough breakaway finish).
• O.D. finish of washers will be as blanked.

About Mounting Tolerances Thrust Needle Roller And Cage Assembly

• On NTA inch type thrust needle roller and cage assemblies, the cage bore has a larger contact area and a closer tolerance than outer diameter.
• Therefore, bore piloting is preferred for these assemblies.
• To reduce wear, it is suggested that the piloting surface for the cage be hardened to an equivalent of at least 55 HRC.
• Where design requirements prevent bore piloting, the NTA thrust needle roller and cage assemblies may be piloted on the outer diameters.
• It should be noted that the "diameter to clear washer O.D." given in the bearing tables is not suitable for outer diameter piloting.
• For such cases, suitable O.D. piloting dimensions should be determined in consultation with your representative the engineering section of this catalog.