Deep groove ball bearings are a widely used type of rolling bearing characterized by low frictional resistance, high rotational speed, and the ability to withstand radial loads or combined radial and axial loads acting simultaneously. Materials for deep groove ball bearings include, but are not limited to, carbon steel, bearing steel, stainless steel, plastics, ceramics, and so on. Among them, the bearing rings and balls are usually made of GCR15 (AISI 52100) refined bearing steel, and the keepers are stamped from 08F high-quality cold rolled steel strip.

Materials for deep groove ball bearings also include high carbon chrome steel, a heat-treated material with excellent strength and wear resistance for high load and high speed conditions. Stainless steel materials have excellent corrosion resistance and are commonly used in wet or chemically corrosive environments. Ceramic materials such as alumina ceramics and silicon nitride oxide ceramics  are characterized by high strength, high hardness, and low coefficient of friction, making them suitable for high-speed, high-temperature, and high-precision application scenarios.

In addition, there are miniature deep groove ball bearings, whose materials are equally diverse, including carbon steel, stainless steel, plastics, ceramics, etc., of which various types of bearings with an outside diameter of less than 9.525mm in the imperial series are also widely used.

The materials of deep groove ball bearings are usually clearly indicated on the assembly drawing, including but not limited to material type, hardness level, accuracy level, etc., to ensure their suitability and performance in specific applications.