NNU4921K NSK Double row cylindrical roller bearings
| Brand Name: |
NSK |
| Model Number: |
NNU4921K |
| Series: |
8500 |
| Cone Part Number: |
8575 |
| Cup Part Number: |
8522 |
| Design Units: |
Imperial |
| Bearing Weight: |
12.5 Kg |
| Cage Type: |
Stamped Steel |
| d: |
234.95 mm |
| D: |
328.625 mm |
| PDF |
NNU4921K |
Product Details
| Series |
8500 |
| Cone Part Number |
8575 |
| Cup Part Number |
8522 |
| Design Units |
Imperial |
| Bearing Weight |
12.5 Kg |
| Cage Type |
Stamped Steel |
| d |
234.95 mm |
| D |
328.625 mm |
| B - Cone Width |
52.388 mm |
| C - Cup Width |
36.513 mm |
| B |
52.388 mm |
| R - Cone Backface To Clear Radius1 |
6.35 mm |
| r - Cup Backface To Clear Radius2 |
3.30 mm |
| da - Cone Frontface Backing Diameter |
247.90 mm |
| db - Cone Backface Backing Diameter |
259.08 mm |
| Da - Cup Frontface Backing Diameter |
314.96 mm |
| Db - Cup Backface Backing Diameter |
306.07 mm |
| Ab - Cage-Cone Frontface Clearance |
3.3 mm |
| Aa - Cage-Cone Backface Clearance |
6.1 mm |
| a - Effective Center Location3 |
7.6 mm |
| C90 - Dynamic Radial Rating (90 million revolutions)4 |
32500 lbf |
| C1 - Dynamic Radial Rating (1 million revolutions)5 |
126000 lbf |
| C0 - Static Radial Rating |
240000 lbf |
| Ca90 - Dynamic Thrust Rating (90 million revolutions)6 |
22700 lbf |
| K - Factor7 |
1.44 |
| e - ISO Factor8 |
0.41 |
| Y - ISO Factor9 |
1.48 |
| G1 - Heat Generation Factor (Roller-Raceway) |
1050.5 |
| G2 - Heat Generation Factor (Rib-Roller End) |
172.4 |
| Cg - Geometry Factor |
0.14 |