We produce different type 3 inch steel ball bearings

If you need 3 inch steel ball bearings. We need know the 3 inch size is the inner bore diameter(ID) or the out ring size(OD) at first.

Then for the material, we have several type can be choose.

Chrome steel 3 inch steel ball bearings
Bearing steel (such as GCr15 or AISI 52100) is one of the most commonly used materials in deep groove ball bearings. It has high hardness, high strength, and good wear resistance, and can withstand large loads and high-speed operation. It is widely used in mechanical equipment such as automobiles, tractors, and machine tools.

Stainless steel 3 inch steel ball bearings
Stainless steel deep groove ball bearings have good corrosion resistance and rust prevention performance, and are suitable for humid or corrosive environments. Common stainless steel materials include AISI SUS440C (domestic code 9Cr18Mo) and AISI 304 (domestic code 1Cr18). Stainless steel bearings can work stably in environments ranging from -60 ℃ to+300 ℃, and are suitable for industries such as food processing, medical equipment, and pharmaceutical machinery.

Plastics 3 inch steel ball bearings
Plastic material deep groove ball bearings have the advantages of being lightweight, corrosion-resistant, and self-lubricating. They are commonly used in applications with light loads, low speeds, or intermittent operation, such as household appliances and office equipment.