C3, C4

Means "increased internal game". Often referred to as high speed, this means that the bearing is designed for high rotational speeds and moderately high temperatures. WARNING and increased internal clearance bearing will not operate optimally at low speeds. We invite you to refer to the technical data sheet of the desired bearing to know its speed limit.

The basic deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls, and a set of cages. There are two types of deep groove ball bearings, single row, and double row. The deep groove ball structure is divided into two types: sealed and open. The open type means that the bearing does not have a sealed structure. The sealed deep groove ball is divided into dust-proof and oil-proof. seal.