| model | 78255D-78571 |
| type | bearing |
| Cone Part Number | 78255D |
| Cup Part Number | 78571 |
| Metering System | Imperial |
| Bearing Type | Roller |
| Roller Bearing Type | Tapered roller |
| Load Direction | Radial force and axial force |
| Structure | Double row |
| Seal Type | Open |
| Outer ring type | Standard Type |
| series | 78000 |
| Inside Diameter | 2.5586" |
| Inner Diameter Tolerance | +0.013" to 0 |
| Outer Diameter | 5.708" |
| Outer Diameter Tolerance | +0.025" to 0 |
| Double Cone Width | 2.598" |
| Double Cone Width | +0.076" to -0.254" |
| Cup width | 0.9058" |
| Cup Width | +0.051" to -0.254" |
| Bearing width across cup body | 2.5616" |
| Bearing width across cup | +0.203" to 0 |
| Cone back to clearance radius | 0.06" |
| Cup back to cleaning radius | 0.14" |
| Cup front backing diameter | 3.11" |
| Cup backing diameter | 4.65" |
| Dynamic Radial Load | 66900 lbf |
| Ferrule Material | 51200 Chrome steel |
| Roller material | 51200 Chrome steel |
| Cage Material | steel |
| Dynamic Radial Rating (90 million revolutions in two columns) | 9970 lbf |
| Dynamic Thrust Rating (90 million rpm) (Ca90) | 14800 lbf |
| Dynamic Radial Rating (90 million revolutions in two columns) | 17400 lbf |
| Lubricant | Lubricant Added |
| Temperature Range | -30° to 110 °C |
| ABEC Standard | ABEC-1 |
| Clearance Range | Standard (applicable to C3/C4/C5) |
| RoHS Standard | Conform |
| REACH Standard | Conform |
| Weight | 10.8 lb |