7221B KOYO Single-row, matched pair angular contact ball bearings
| Brand Name: | KOYO |
| Model Number: | 7221B |
| Series: | 234000 |
| Cone Part Number: | EE234156 |
| Cup Part Number: | 234215W |
| Design Units: | Imperial |
| Bearing Weight: | 44.200 Kg |
| Cage Type: | Stamped Steel |
| d: | 396.875 mm |
| D: | 546.100 mm |
Product Details
| Series | 234000 |
| Cone Part Number | EE234156 |
| Cup Part Number | 234215W |
| Design Units | Imperial |
| Bearing Weight | 44.200 Kg |
| Cage Type | Stamped Steel |
| d | 396.875 mm |
| D | 546.100 mm |
| B - Cone Width | 61.120 mm |
| C - Cup Width | 55.563 mm |
| B | 76.203 mm |
| R - Cone Backface To Clear Radius1 | 6.35 mm |
| r - Cup Backface To Clear Radius2 | 6.35 mm |
| da - Cone Frontface Backing Diameter | 418.08 mm |
| db - Cone Backface Backing Diameter | 427.99 mm |
| Da - Cup Frontface Backing Diameter | 515.87 mm |
| Db - Cup Backface Backing Diameter | 503.94 mm |
| Ab - Cage-Cone Frontface Clearance | 7.9 mm |
| Aa - Cage-Cone Backface Clearance | 12.7 mm |
| a - Effective Center Location3 | 35.6 mm |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 63300 lbf |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 244000 lbf |
| C0 - Static Radial Rating | 451000 lbf |
| Ca90 - Dynamic Thrust Rating (90 million revolutions)6 | 51600 lbf |
| K - Factor7 | 1.23 |
| e - ISO Factor8 | 0.48 |
| Y - ISO Factor9 | 1.26 |
| G1 - Heat Generation Factor (Roller-Raceway) | 2782.9 |
| G2 - Heat Generation Factor (Rib-Roller End) | 448.6 |
| Cg - Geometry Factor | 0.202 |
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