Nadella bearings are used in many racecar applications because of their small size, low weight, and high load capacity. The "combination" design features needle rollers arranged axially around the bore for rotation, plus another set of needle rollers arranged radially at one end for thrust. A common use for this style is in rocker pivots on cars with inboard suspension. Two bearings are typically pressed into the rocker from either side, with the radial bearings facing outwards.
Nadella bearings require lubrication before use. A high-quality lithium-based, EP, or synthetic bearing grease is recommended when these bearings are used as suspension pivots. Higher rotational speeds with lower load (such as supporting rotating shafts inside machines) may require oil lubrication.
|Nadella Combined Bearing Dimensions|
|Bore Size |
(Axial Bearing ID)
|Housing OD |
(Around Axial Bearings)
|Radial Bearings ID ||Radial Bearings OD ||Housing OD |
|Dynamic Radial Capacity* ||Dynamic Axial Capacity* |
|12mm ||18mm ||15mm ||22.6mm ||27.5mm ||2473 lb ||562 lb |
|14mm ||20mm ||17mm ||24.6mm ||29.5mm ||2810 lb ||652 lb |
|15mm ||21mm ||19mm ||26.6mm ||31.5mm ||3147 lb ||697 lb |
|18mm ||24mm ||21mm ||28.6mm ||33.5mm ||3597 lb ||1304 lb |
|20mm ||26mm ||22mm ||31.6mm ||36.5mm ||4047 lb ||1439 lb |
|25mm ||33mm ||30mm ||39.6mm ||45.5mm ||4946 lb ||2360 lb |
* Note: In order to achieve rated capacity and life, the mating surfaces should have a smooth finish with a Rockwell hardness between C58 and C64. Commercially-available bolts are too soft for use as a pivot (Grade 8.8 will provide less than 15% of the dynamic load capacity). A better design would be to fit a hardened sleeve between the bolt and the bearing. We offer matching Thin Nadella Thrust Washers (Part No. 3081) and Thick Nadella Thrust Washers (Part No. 3082) separately to provide the proper hardness and finish in the axial direction.