| model | 25590-25521-B |
| type | bearing |
| Cone Part Number | 25590 |
| Cup Part Number | 25521-B |
| Metering System | Imperial |
| Bearing Type | Roller |
| Roller Bearing Type | Tapered roller |
| Load Direction | Radial force and axial force |
| Structure | Single Column |
| Seal Type | Open |
| Outer ring type | Flange |
| series | 25500 |
| Inside Diameter | 1.796" |
| Inner Diameter Tolerance | +0.013" to 0 |
| Outer Diameter | 3.27" |
| Outer Diameter Tolerance | +0.025" to 0 |
| Cone Width | 1" |
| Cone Width | +0.076" to -0.254" |
| Cup width | 0.75" |
| Cup Width | +0.051" to -0.254" |
| Flange outer diameter (D1) | 3.422" |
| Outer ring flange width (C1) | 0.1563" |
| Flange bearing width | 0.9375" |
| Cone back to clearance radius | 0.14" |
| Cup back to cleaning radius | 0.130" |
| Tapered Front Backing Diameter | 2.01" |
| Tapered backing diameter | 2.28" |
| Cup front backing diameter | 3.18" |
| Cage cone front clearance | 0.06" |
| Cage cone back clearance | 0.01" |
| Effective central location | -0.25" |
| Ferrule Material | 51200 Chrome steel |
| Roller material | 51200 Chrome steel |
| Cage Material | steel |
| Dynamic Radial Load | 20300 lbf |
| Static Radial Load | 24900 lbf |
| Dynamic Radial Rating (90 million rpm) (C90) | 5270 lbf |
| Dynamic Thrust Rating (90 million rpm) (Ca90) | 3020 lbf |
| Lubricant | Lubricant Added |
| Temperature Range | -30° to 110 °C |