Description

*** 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.