| model | 15578-15520RB |
| type | bearing |
| Cone Part Number | 15578 |
| Cup Part Number | 15520RB |
| 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 | Standard Type |
| series | 15500 |
| Inside Diameter | 1" |
| Inner Diameter Tolerance | +0.013" to 0 |
| Outer Diameter | 2.25" |
| Outer Diameter Tolerance | +0.025" to 0 |
| Cone Width | 0.6875" |
| Cone Width | +0.076" to -0.254" |
| Cup width | 0.5313" |
| Cup Width | +0.051" to -0.254" |
| Width | 0.6876" |
| Width Tolerance | +0.203" to 0 |
| Cone back to clearance radius | 0.050" |
| Cup back to cleaning radius | 0.06" |
| Tapered Front Backing Diameter | 1.2" |
| Tapered backing diameter | 1.28" |
| Cup front backing diameter | 2.11" |
| Cup backing diameter | 2.01" |
| Cage cone front clearance | 0.1" |
| Cage cone back clearance | 0" |
| Effective central location | -0.2" |
| Ferrule Material | 51200 Chrome steel |
| Roller material | 51200 Chrome steel |
| Cage Material | steel |
| Dynamic Radial Load | 12300 lbf |
| Static Radial Load | 11300 lbf |
| Dynamic Radial Rating (90 million rpm) (C90) | 3180 lbf |
| Dynamic Thrust Rating (90 million rpm) (Ca90) | 1880 lbf |
| Lubricant | Lubricant Added |
| Temperature Range | -30° to 110 °C |