The LD-407 spherical roller bearing represents the pinnacle of self-aligning bearing technology, combining extremely high radial load capacity with the ability to accommodate significant shaft misalignment. Featuring two rows of symmetrical barrel-shaped rollers guided by a central rib, these bearings operate within a spherically ground outer ring raceway that permits angular misalignment of the shaft relative to the housing. Manufactured from premium high carbon chromium bearing steel (GCr15/SUJ2) with case-carburized options available for extreme shock applications, the LD-407 series delivers exceptional durability and fatigue resistance. The barrel roller geometry, optimized through advanced engineering, ensures uniform stress distribution across the roller-raceway contact area, maximizing load capacity while minimizing friction and wear. Both brass and steel cages are available, with brass preferred for high-speed or high-temperature applications. Available in 22200, 22300, 21300, 23100, and 23000 series with bore diameters from 20mm to 200mm, the LD-407 series covers a comprehensive range of heavy-duty applications. Cylindrical and tapered bore options provide mounting flexibility, while multiple clearance classes (C2, C3, C4) allow precise matching to operating temperature and load conditions. Tapered bore versions with adapter sleeves facilitate installation on standard straight shafts and enable easy clearance adjustment. These spherical roller bearings are the bearing of choice for the most demanding industrial environments including mining crushers, wind turbine gearboxes, paper mill machinery, steel processing equipment, and construction machinery. Their exceptional combination of very high radial load capacity, moderate axial load capability in both directions, and self-aligning performance makes them indispensable in heavy machinery applications where shock loads, vibration, and misalignment are common operating conditions.