NNU4938 KOYO Double-row cylindrical roller bearings
| Brand Name: | KOYO |
| Model Number: | NNU4938 |
| Series: | LL382100 |
| Cone Part Number: | LL382149 |
| Cup Part Number: | LL382110 |
| Design Units: | Imperial |
| Bearing Weight: | 54.8 Kg |
| Cage Type: | Stamped Steel |
| d: | 698.500 mm |
| D: | 819.150 mm |
| PDF |
NNU4938 |
Product Details
| Series | LL382100 |
| Cone Part Number | LL382149 |
| Cup Part Number | LL382110 |
| Design Units | Imperial |
| Bearing Weight | 54.8 Kg |
| Cage Type | Stamped Steel |
| d | 698.500 mm |
| D | 819.150 mm |
| B - Cone Width | 63.5 mm |
| C - Cup Width | 50.800 mm |
| B | 63.5 mm |
| R - Cone Backface To Clear Radius1 | 3.300 mm |
| r - Cup Backface To Clear Radius2 | 3.30 mm |
| da - Cone Frontface Backing Diameter | 717.04 mm |
| db - Cone Backface Backing Diameter | 720.09 mm |
| Da - Cup Frontface Backing Diameter | 803.91 mm |
| Db - Cup Backface Backing Diameter | 791.97 mm |
| Ab - Cage-Cone Frontface Clearance | 0.8 mm |
| Aa - Cage-Cone Backface Clearance | 5.3 mm |
| a - Effective Center Location3 | 54.6 mm |
| C90 - Dynamic Radial Rating (90 million revolutions)4 | 61500 lbf |
| C1 - Dynamic Radial Rating (1 million revolutions)5 | 237000 lbf |
| C0 - Static Radial Rating | 716000 lbf |
| Ca90 - Dynamic Thrust Rating (90 million revolutions)6 | 36800 lbf |
| K - Factor7 | 1.67 |
| e - ISO Factor8 | 0.35 |
| Y - ISO Factor9 | 1.72 |
| G1 - Heat Generation Factor (Roller-Raceway) | 9940 |
| G2 - Heat Generation Factor (Rib-Roller End) | 2090.8 |
| Cg - Geometry Factor | 0.274 |
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