3478 NTN

The 3478 NTN is a removable cone that serves as the inner ring and rollers of a single-row tapered roller bearing. When combined with a separate cup (or outer ring), it forms a complete tapered roller bearing. With conical raceways on the inner and outer rings and tapered rollers, this bearing can efficiently handle radial and axial forces in one direction. The design minimizes sliding movements between the raceways and rollers, reducing component wear. Proper bearing operation requires a minimum load, and the separable cone and cup enable easy mounting and adjustment of axial clearance or preload during assembly. For reliable performance, it is advisable to replace both the cone and cup simultaneously and use components from the same manufacturer to avoid bearing problems arising from differences in internal profiles, materials, and tolerances. Always pair the 3478 NTN with a compatible cup from the same manufacturer for optimal results.