A bearing unit with a seat is a bearing unit that integrates an outer spherical bearing with a bearing seat. Most outer spherical bearings are processed into spherical structures, which can be matched and assembled with bearing seats with spherical inner holes. The structural styles are diverse and have good universality and interchangeability.

This type of bearing structure comes with self centering ability, easy assembly operation, and is equipped with a double-layer sealing structure, which can be used in environments with poor working conditions. The bearing seat is mainly divided into two manufacturing processes: casting and stamping.

Common types of cast bearing seats include: vertical seat (P), narrow vertical seat (PA), high center vertical seat (PH), square seat (F), convex square seat (FS), convex circular seat (FC), diamond seat (FL), annular seat (C), slider seat (T), suspension seat (HA), adjustable diamond seat (FA), and suspension bearing seat (FB);

Common types of stamped bearing seats include: circular stamped seat (PF), diamond stamped seat (PFL), triangular stamped seat (PFT), vertical stamped seat (PP), etc.