Ball Bearings

• Deep Groove Ball Bearings

NSK manufactures a full range of deep groove ball bearings (DGBBs). These versatile bearings are the most common type and serve a wide variety of industries.
Besides radial loads, DGBBs can take axial loads in both directions and offer low frictional torque and high-speed components ideal for applications requiring low noise and vibration.

• Angular Contact Ball Bearings

NSK's comprehensive range of angular contact ball bearings is designed to meet the ever-evolving requirements of equipment manufacturers.                                                                                                    Angular contact ball bearings feature a contact angle that sustains significant axial loads in one direction at the same time as radial loads.                                                                                                      Since an axial component is generated when radial load is applied, these bearings are typically used in pairs or multi-bearing sets.

• Self-Aligning Ball Bearings

Self-aligning ball bearings are recommended for applications where aligning the shaft and housing is difficult or where the shaft may bend, such as transmission shafts. The outer ring has a spherical raceway and its center of curvature coincides with that of the bearing, allowing the axis of the inner ring, balls, and cage to rotate freely around the bearing center. Pressed steel cages are typically used for this type.
Since they have a small contact angle, self-aligning ball bearings have low axial load capacity. Permissible dynamic misalignment is approximately 0.07 to 0.12 radian (4 to 7 degrees) under normal loads; however, such angles may not be allowable depending on the surrounding structure.

• Thrust Ball Bearings

Thrust ball bearings are designed to take axial (thrust) loads at high speeds, but they cannot handle any radial loads. These bearings feature bearing washers with raceway grooves in which the balls move.
Thrust ball bearings are classified into flat seat and aligning seat types, based on the shape of the housing washer (outer ring seat), and as single-direction or double-direction. Spherical and aligning seat washers help to provide tolerance for mounting errors. 

• N Series Thin-Section Ball Bearings

Extremely thin-section ball bearings contribute to equipment downsizing, lighter weight, and low torque in robots, construction equipment, and industrial machinery.
With lower frictional torque and less torque variation, N Series bearings improve torque transmission and provide smooth rotation. These high-precision bearings also support high speeds.