Single row open tapered roller bearing NTN 4T-3984/3920 for cylindrical shafts. Steel cage, inch size series.

Limit rotation speed 3200 rpm. Design dynamic load 174 kN, design static load 1.18 kN. Manufacturer's recommended operating temperature -40°C to 120°C

Outer ring width (B): 23.812 mm.
Inner ring width (C): 30.048 mm.
Overall width bearing assembly (T): 30.162 mm.
Capable of supporting axial and radial loads like an angular contact bearing. The split design of tapered roller bearings allows the inner ring with rollers and cage to be installed separately from the outer (outer) ring. Often installed in pairs in a back-to-back pattern or mirrored.
Found under catalog numbers: JD7378+JD7292, etc.