NTN 78/670 angular contact ball bearings
NTN 78/670 angular contact ball bearings Engineering Calculator , 421437 Cup Part Number 420000 Series Manufacturing Service . Get Your Free. EE420812X Cone Part Number
| Series | 420000 |
| Cone Part Number | EE420812X |
| Cup Part Number | 421437 |
| Design Units | Imperial |
| Bearing Weight | 36.200 Kg |
| Cage Type | Stamped Steel |
| d | 206.375 mm |
| D | 365.049 mm |
| B – Cone Width | 88.897 mm |
| C – Cup Width | 63.500 mm |
| B | 92.075 mm |
| R – Cone Backface To Clear Radius1 | 6.35 mm |
| r – Cup Backface To Clear Radius2 | 3.30 mm |
| da – Cone Frontface Backing Diameter | 229.11 mm |
| db – Cone Backface Backing Diameter | 239.01 mm |
| Da – Cup Frontface Backing Diameter | 334.30 mm |
| Db – Cup Backface Backing Diameter | 328.93 mm |
| Ab – Cage-Cone Frontface Clearance | 3.6 mm |
| Aa – Cage-Cone Backface Clearance | 18.3 mm |
| a – Effective Center Location3 | -15.5 mm |
| C90 – Dynamic Radial Rating (90 million revolutions)4 | 64300 lbf |
| C1 – Dynamic Radial Rating (1 million revolutions)5 | 248000 lbf |
| C0 – Static Radial Rating | 409000 lbf |
| Ca90 – Dynamic Thrust Rating (90 million revolutions)6 | 44200 lbf |
| K – Factor7 | 1.45 |
| e – ISO Factor8 | 0.4 |
| Y – ISO Factor9 | 1.49 |
| G1 – Heat Generation Factor (Roller-Raceway) | 1150.5 |
| G2 – Heat Generation Factor (Rib-Roller End) | 128.2 |
| Cg – Geometry Factor | 0.145 |
Detailed Parameters
parameter：
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