Bearing RNA4912TT NSK RNA4912TT NSK bearing Size Chart (mm/inches) |
|---|
| Series | M252300 |
| Cone Part Number | M252349 |
| Cup Part Number | M252310X |
| Design Units | Imperial |
| Bearing Weight | 25.2 Kg |
| Cage Type | Stamped Steel |
| d | 269.875 mm |
| D | 381.000 mm |
| B - Cone Width | 74.613 mm |
| C - Cup Width | 57.150 mm |
| B | 74.610 mm |
| R - Cone Backface To Clear Radius1 | 6.35 mm |
| r - Cup Backface To Clear Radius2 | 3.30 mm |
| da - Cone Frontface Backing Diameter | 287.02 mm |
| db - Cone Backface Backing Diameter | 295.91 mm |
| Da - Cup Frontface Backing Diameter | 364.00 mm |
| Db - Cup Backface Backing Diameter | 356.11 mm |
| Ab - Cage-Cone Frontface Clearance | 4.8 mm |
| Aa - Cage-Cone Backface Clearance | 7.6 mm |
| a - Effective Center Location3 | -6.6 mm |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 67000 lbf |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 258000 lbf |
| C0 - Static Radial Rating | 455000 lbf |
| Ca90 - Dynamic Thrust Rating (90 million revolutions)6 | 38100 lbf |
| K - Factor7 | 1.76 |
| e - ISO Factor8 | 0.33 |
| Y - ISO Factor9 | 1.8 |
| G1 - Heat Generation Factor (Roller-Raceway) | 1839.2 |
| G2 - Heat Generation Factor (Rib-Roller End) | 226.1 |
| Cg - Geometry Factor | 0.159 |