Timken M12411DB Double Cone Tapered Roller Bearing Assembly

The Timken M12411DB is a factory-matched double-cone tapered roller bearing assembly consisting of two M12448 inner-ring cones supplied as a matched pair with a bearing spacer. It is designed to operate with the corresponding Timken double cup to support heavy combined radial and axial loads while maintaining controlled preload and end play for precise shaft positioning. Commonly installed in industrial gearboxes, conveyors, mining and aggregate equipment, construction machinery, agricultural equipment, and power transmission systems, this matched double-cone assembly provides high stiffness and accurate axial location under thrust and radial loads. Key specifications include bore diameter 0.8750 in (22.225 mm), cage type stamped steel, and material high-grade bearing steel, with two M12448 cones forming the inner-ring pair and design series DB in the M12400 family. It is designed for Timken matched double-cup assemblies (not interchangeable with a standard single cup); dynamic rating, static rating, and dynamic axial rating, as well as weight, are defined in the matched assembly specification.