| Product Number | 331978 BG Bearing |
| System of Measurement | Metric |
| Bearing Type | Roller |
| Roller Bearing Type | Tapered Roller |
| Type | Bearing |
| For Load Direction | Combined Radial and Thrust |
| Construction | Four-row |
| Seal Type | Open |
| Bore Dia (d) | 540 mm |
| Bore Dia Tolerance | -0.05mm to 0 |
| Outer Dia (D) | 690 mm |
| Outer Dia Tolerance | -0.075mm to 0 |
| Total Bearing Width Over Inner Rings | 400 mm |
| Total Bearing Width Over Outer Rings | 400 mm |
| Ring Material | 52100 Chrome Steel |
| Cage Material | Steel |
| Roller Material | 52100 Chrome Steel |
| Dynamic Radial Load | 1683000 lbf |
| Static Radial Load | 4770000 lbf |
| Lubrication | Required |
| Temperature Range | -30° to 110 °C |
| ABEC Rating | ABEC-1 |
| RoHS | Compliant |
| REACH | Compliant |
| Weight | 820.12 lb |
| Radial Clearance | Standard (Available in C3/C4/C5) |
331978 BG Bearing|Rolling mill bearings | four row tapered roller bearings | tapered roller bearings|331978 BG_Bearing
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