
| Part Number | 78251D-78571 |
| System of Measurement | Inch |
| Type | Bearing |
| Cone Part Number | 78251D |
| Cup Part Number | 78571 |
| Bearing Type | Roller |
| Roller Bearing Type | Tapered |
| For Load Direction | Combined |
| Construction | Double Row |
| Seal Type | Open |
| Cups Type | Standard |
| Series | 78000 |
| Bore Dia | 2.5″ |
| Bore Dia Tolerance | +0.005″ to 0 |
| Outer Dia | 5.708″ |
| Outer Dia Tolerance | +0.001″ to 0 |
| Double Cone Width | 2.598″ |
| Double Cone Width Tolerance | +0.003″ to -0.01 |
| Cup Width | 0.9058″ |
| Cup Width Tolerance | +0.002″ to -0.01 |
| Bearing Width Across Cups | 2.5616″ |
| Bearing Width Across Cups Tolerance | +0.008″ to 0 |
| Cone Backface ToClear Radius | 0.09″ |
| Cup Backface ToClear Radius | 0.14″ |
| Cup Frontface Backing Diameter | 3.11″ |
| Cup Backface Backing Diameter | 4.65″ |
| Dynamic Radial Load | 66900 lbf |
| Ring Material | Chrome Steel |
| Roller Material | Chrome Steel |
| Cage Material | Steel |
| Dynamic Radial Rating(One Row 90 Million Revolutions) | 9970 lbf |
| Dynamic Thrust Rating(90 Million Revolutions) | 14800 lbf |
| Dynamic Radial Rating(Two Row 90 Million Revolutions) | 17400 lbf |
| Lubrication | Required |
| Temperature Range | -30° to 110 °C |
| ABEC Rating | ABEC-1 |
| Radial Clearance | Standard (Available in C3/C4/C5) |
| RoHS | Compliant |
| REACH | Compliant |
| Weight | 10.8 lb |









