A deep groove in a ball bearing refers to the specific design feature of the bearing's inner and outer raceways, which allows it to accommodate radial and axial loads while enabling smooth and efficient rotation. The deep groove is a critical aspect of the ball bearing's construction and contributes to its performance in various applications.

The primary differences between taper roller bearings and spherical roller bearings are as follows:

Overall, in mechanical terms, a bearing serves as a critical component that enables controlled motion, reduces friction, and supports loads in a wide variety of mechanical systems, playing a fundamental role in the functionality and performance of machinery across industries.