68FC45250BW KOYO Four-row cylindrical roller bearings
| Brand Name: | KOYO |
| Model Number: | 68FC45250BW |
| Series: | 129000 |
| Cone Part Number: | EE129120X |
| Cup Part Number: | 129174 |
| Design Units: | Imperial |
| Bearing Weight: | 33.6 Kg |
| Cage Type: | Stamped Steel |
| d: | 304.8 mm |
| D: | 439.948 mm |
| PDF |
68FC45250BW |
Product Details
| Series | 129000 |
| Cone Part Number | EE129120X |
| Cup Part Number | 129174 |
| Design Units | Imperial |
| Bearing Weight | 33.6 Kg |
| Cage Type | Stamped Steel |
| d | 304.8 mm |
| D | 439.948 mm |
| B - Cone Width | 76.992 mm |
| C - Cup Width | 53.975 mm |
| B | 76.203 mm |
| R - Cone Backface To Clear Radius1 | 6.35 mm |
| r - Cup Backface To Clear Radius2 | 4.83 mm |
| da - Cone Frontface Backing Diameter | 327.91 mm |
| db - Cone Backface Backing Diameter | 334.01 mm |
| Da - Cup Frontface Backing Diameter | 411.50 mm |
| Db - Cup Backface Backing Diameter | 406.91 mm |
| Ab - Cage-Cone Frontface Clearance | -0.5 mm |
| Aa - Cage-Cone Backface Clearance | 14.2 mm |
| a - Effective Center Location3 | 7.4 mm |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 52200 lbf |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 201000 lbf |
| C0 - Static Radial Rating | 401000 lbf |
| Ca90 - Dynamic Thrust Rating (90 million revolutions)6 | 37200 lbf |
| K - Factor7 | 1.4 |
| e - ISO Factor8 | 0.42 |
| Y - ISO Factor9 | 1.44 |
| G1 - Heat Generation Factor (Roller-Raceway) | 1882.6 |
| G2 - Heat Generation Factor (Rib-Roller End) | 272.9 |
| Cg - Geometry Factor | 0.171 |
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