NBS NK 37/30 needle roller bearings
Various types and 2581 Cone Part Number sizes to accommodate your NBS NK 37/30 needle roller bearings 2500 Series requirements.
| Series | 2500 |
| Cone Part Number | 2581 |
| Cup Part Number | 2523-S |
| Design Units | Imperial |
| Bearing Weight | 0.4 Kg |
| Cage Type | Stamped Steel |
| d | 33.338 mm |
| D | 69.850 mm |
| B – Cone Width | 25.357 mm |
| C – Cup Width | 19.050 mm |
| B | 23.813 mm |
| R – Cone Backface To Clear Radius1 | 0.760 mm |
| r – Cup Backface To Clear Radius2 | 1.52 mm |
| da – Cone Frontface Backing Diameter | 39.12 mm |
| db – Cone Backface Backing Diameter | 39.62 mm |
| Da – Cup Frontface Backing Diameter | 65.00 mm |
| Db – Cup Backface Backing Diameter | 60.96 mm |
| Ab – Cage-Cone Frontface Clearance | 1.5 mm |
| Aa – Cage-Cone Backface Clearance | 0.5 mm |
| a – Effective Center Location3 | -8.6 mm |
| C90 – Dynamic Radial Rating (90 million revolutions)4 | 4880 lbf |
| C1 – Dynamic Radial Rating (1 million revolutions)5 | 18800 lbf |
| C0 – Static Radial Rating | 21200 lbf |
| Ca90 – Dynamic Thrust Rating (90 million revolutions)6 | 2280 lbf |
| K – Factor7 | 2.14 |
| e – ISO Factor8 | 0.27 |
| Y – ISO Factor9 | 2.19 |
| G1 – Heat Generation Factor (Roller-Raceway) | 23.6 |
| G2 – Heat Generation Factor (Rib-Roller End) | 9.63 |
| Cg – Geometry Factor | 0.0656 |
Detailed Parameters
parameter：
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