The 6307ZZ is a single row deep groove ball bearing, a widely used and versatile type of rolling bearing. It features a 35 mm bore diameter, an 80 mm outer diameter, and a 21 mm width. The 'ZZ' designation indicates that the bearing is equipped with two non-contacting metal shields on both sides, providing effective protection against contaminants and retaining lubricant. This design makes it suitable for applications with moderate speeds and radial loads, offering reliable performance and reduced maintenance in various industrial machinery.