NNU30/53 TIMKEN Double row cylindrical roller bearings
| Brand Name: | TIMKEN |
| Model Number: | NNU30/53 |
| Series: | HM252300 |
| Cone Part Number: | HM252343 |
| Cup Part Number: | HM252310 |
| Design Units: | Imperial |
| Bearing Weight: | 42.00 Kg |
| Cage Type: | Stamped Steel |
| d: | 254.000 mm |
| D: | 422.275 mm |
Product Details
| Series | HM252300 |
| Cone Part Number | HM252343 |
| Cup Part Number | HM252310 |
| Design Units | Imperial |
| Bearing Weight | 42.00 Kg |
| Cage Type | Stamped Steel |
| d | 254.000 mm |
| D | 422.275 mm |
| B - Cone Width | 79.771 mm |
| C - Cup Width | 66.675 mm |
| B | 86.121 mm |
| R - Cone Backface To Clear Radius1 | 6.860 mm |
| r - Cup Backface To Clear Radius2 | 3.30 mm |
| da - Cone Frontface Backing Diameter | 280.92 mm |
| db - Cone Backface Backing Diameter | 287.02 mm |
| Da - Cup Frontface Backing Diameter | 401.07 mm |
| Db - Cup Backface Backing Diameter | 391.92 mm |
| Ab - Cage-Cone Frontface Clearance | 6.1 mm |
| Aa - Cage-Cone Backface Clearance | 12.2 mm |
| a - Effective Center Location3 | -9.4 mm |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 87400 lbf |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 337000 lbf |
| C0 - Static Radial Rating | 455000 lbf |
| Ca90 - Dynamic Thrust Rating (90 million revolutions)6 | 49700 lbf |
| K - Factor7 | 1.76 |
| e - ISO Factor8 | 0.33 |
| Y - ISO Factor9 | 1.8 |
| G1 - Heat Generation Factor (Roller-Raceway) | 1500 |
| G2 - Heat Generation Factor (Rib-Roller End) | 148 |
| Cg - Geometry Factor | 0.148 |