Bearing NJ305R KOYO NJ305R KOYO bearing Size Chart (mm/inches) |
|---|
| Series | 30209M |
| Cone Part Number | X30209M |
| Cup Part Number | Y30209M |
| Design Units | METRIC |
| Bearing Weight | 0.5 Kg |
| Cage Type | Stamped Steel |
| d | 45.000 mm |
| D | 85.000 mm |
| B - Cone Width | 19.000 mm |
| C - Cup Width | 16 mm |
| B | 20.750 mm |
| R - Cone Backface To Clear Radius1 | 1.520 mm |
| r - Cup Backface To Clear Radius2 | 1.52 mm |
| da - Cone Frontface Backing Diameter | 53.09 mm |
| db - Cone Backface Backing Diameter | 55.12 mm |
| Da - Cup Frontface Backing Diameter | 80.77 mm |
| Db - Cup Backface Backing Diameter | 75.95 mm |
| Ab - Cage-Cone Frontface Clearance | 4.3 mm |
| Aa - Cage-Cone Backface Clearance | 0.5 mm |
| a - Effective Center Location3 | -2.5 mm |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 24600 N |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 94800 N |
| C0 - Static Radial Rating | 89000 N |
| Ca90 - Dynamic Thrust Rating (90 million revolutions)6 | 17000 N |
| K - Factor7 | 1.44 |
| e - ISO Factor8 | 0.4 |
| Y - ISO Factor9 | 1.48 |
| G1 - Heat Generation Factor (Roller-Raceway) | 28.3 |
| G2 - Heat Generation Factor (Rib-Roller End) | 16.3 |
| Cg - Geometry Factor | 0.0789 |