深沟球轴承是滚动轴承中最为普通的一种类型。基本型的深沟球轴承由一个外圈，一个内圈、一组钢球和一组保持架构成。 深沟球轴承类型有单列和双列两种，深沟球结构还分密封和开式两种结构，开式是指轴承不带密封结构，密封型深沟球分为防尘密封和防油密封。防尘密封盖材料为钢板冲压，只起到简单的防止灰尘进入轴承滚道。防油型为接触式油封，能有效的阻止轴承内的润滑脂外溢。

Deep groove ball bearing is the most common type of rolling bearing. The basic deep groove ball bearings are made of a outer ring, an inner ring, a set of steel balls, and a group of retaining structures. There are two kinds of deep groove ball bearings: single row and double row. Deep groove ball structure is also divided into two types: open and sealed. The open type means that the bearing does not have a sealing structure, and the sealed deep groove ball is divided into dust seal and oil seal. The dust proof cover material is stamped for the steel plate, only to prevent the dust from entering the bearing raceway. The oil proof type is contact oil seal, which can effectively prevent the grease spillover in the bearing.

单列深沟球轴承类型代号为6，双列深沟球轴承代号为4。其结构简单，使用方便，是生产最普遍，应用最广泛的一类轴承。

Single row deep groove ball bearing type code number 6, double row deep groove ball bearing code number 4. It is simple in structure and convenient in use. It is the most widely used and widely used type of bearing.