BC1-7257 bearings ( 100 mm x 180 mm x 40 mm) have the advantages of Ultra-high reliability, long lifespan, maintenance-free operation, and adaptability to extreme conditions, and are therefore widely used in the Railway vehicle axle boxes, traction motors, gearboxes and wheelset systems.

| Part Number | BC1-7257 |
| Interchangeable | SKF BC1-7257 |
| Bearing Type | INSOCOAT cylindrical roller bearings, single row for railway vehicle |
| Load | radial |
| Accuracy class | PN |
| Coating | NO |
| Bearing part | Complete |
| Design | BC1 |
| Internal clearance | C3 |
| Row NO. | One |
| Seal | Open |
| Number of ring | outer ring(2), inner ring(0) |
| Units | Metric |
| Manufacturer Part Code | BC1-7257 |
| Series | BC1 72 series (BC1 72.. ) |
| Lubrication | NO |
| Locating feature | NO |
| Application | Traction motor |
| Relubrication feature | NO |
| Loose flange | NO |
| Weight [lb] | 8.9948 |
| Cr Radial Dynamic [lbf] | 56179 |
| C0r Radial Static [lbf] | 68251 |
| nG Speed ratings (oil) [rpm] | 4423 |
| d φ Inside [inch] | 3.9370 |
| D Φ Outside [inch] | 7.0866 |
| B Thickness [inch] | 1.5748 |
| Axial displacement capability | In both directions |
Cylindrical roller bearings: High radial load capacity, suitable for high speeds, used in high-speed train axle boxes, traction motors, and gearboxes.
Tapered roller bearings: Capable of both radial and axial heavy loads, high rigidity, used in freight cars, locomotives, and high-speed train axle boxes.
Deep groove ball bearings: Simple structure, high speed, maintenance-free, used in traction motors and gearboxes.
Spherical roller bearing: Self-aligning, high load capacity, impact resistant, used in locomotive axle boxes and traction motor bearings.
Angular contact ball bearings: High precision, low friction, suitable for high-speed axial loads, used in high-performance traction motors and engines.















