61876Q4A/P69

61876Q4A/P69 is a large-sized high-precision deep groove ball bearing of the 618 series. It focuses on the core transmission requirements in heavy-duty industrial scenarios that have strict demands for precision, stability, and anti-interference. Based on the large-sized structure of 380mm inner diameter, 480mm outer diameter, and 46mm width, it is equipped with Q4A special design to enhance sealing protection and adaptability. The P69 high precision grade ensures the coaxiality and smoothness of operation. Combined with the excellent fatigue resistance and wear resistance of high-carbon chromium bearing steel (GCr15), it has strong bearing capacity and can stably withstand large radial loads and certain bidirectional axial loads. The low friction coefficient design is suitable for long-term continuous operation conditions. It is also convenient for installation and has low maintenance costs, and can flexibly adapt to metallurgical heavy equipment, high-precision heavy machine tools, large motors and reducers, wind power core transmission systems, port lifting equipment, engineering hydraulic machinery and other fields. It provides reliable and precise rotational support for various large-sized heavy-duty high-precision equipment, balancing the advantages of heavy-duty compatibility and high-precision transmission, and meeting the core transmission requirements of high-end heavy-duty equipment in multiple industries.