BCZ-0509 bearings ( 100 mm x 225 mm x 120 mm) have the advantages of High rigidity, high load-bearing capacity and precision retention, and are therefore widely used in the Backing for multi-roll mills.

| Part Number | BCZ-0509 |
| Interchangeable | SKF BCZ-0509 |
| Cage | Machined brass cage, roller centred |
| Bearing Type | Backing bearings for cluster mills |
| Load | radial |
| Accuracy class | P4 (ABEC 7) |
| Coating | NO |
| Bearing part | Complete |
| Design | With axial guidance |
| Internal clearance | NSTD |
| Row NO. | Two |
| Seal | Seal on both sides |
| Sealing type | Contact |
| Number of holes | 1 |
| Units | Metric |
| Manufacturer Part Code | BCZ-0509 |
| Series | BCZ series(BCZ-05..) |
| Application | cluster mills |
| Relubrication feature | Yes |
| Weight [lb] | 61.0674 |
| Cr Radial Dynamic [lbf] | 112585 |
| C0r Radial Static [lbf] | 156073 |
| Pu Fatigue load limit [lbf] | 18685 |
| Fr max. Dynamic radial loads [lbf] | 106427 |
| F0r max. Static radial loads [lbf] | 150321 |
| d φ Inside [inch] | 3.9370 |
| D Φ Outside [inch] | 8.8582 |
| B Thickness [inch] | 4.7244 |
| C [inch] | 4.6457 |
| K [inch] | 0.1969 |
| r min. Chamfer [inch] | 0.020 |
| d1 [inch] | 5.0866 |
| D1 [inch] | 5.9055 |
| H(max.) Section height [inch] | 2.460 |
The BCZ-0509 Backed bearings primarily consist of an inner ring, an outer ring, single-row, double-row, or triple-row cylindrical rollers, and a cage. The outer ring is exceptionally thick, and the rollers and raceways feature a logarithmic profile design to optimize load distribution and reduce edge stress.
Backed bearings possess extremely high load-carrying capacity, capable of withstanding heavy loads and impact loads, while exhibiting low friction, minimal heat generation, and a long service life. The outer surface of the outer ring also utilizes a logarithmic profile, reducing edge loads during operation and improving operational reliability.














