NNU4972 KOYO Double-row cylindrical roller bearings
| Brand Name: |
KOYO |
| Model Number: |
NNU4972 |
| Series: |
18000 |
| Cone Part Number: |
18204X |
| Cup Part Number: |
18335X |
| Design Units: |
Imperial |
| Bearing Weight: |
0.4 Kg |
| Cage Type: |
Stamped Steel |
| d: |
51.999 mm |
| D: |
85.001 mm |
| PDF |
NNU4972 |
Product Details
| Series |
18000 |
| Cone Part Number |
18204X |
| Cup Part Number |
18335X |
| Design Units |
Imperial |
| Bearing Weight |
0.4 Kg |
| Cage Type |
Stamped Steel |
| d |
51.999 mm |
| D |
85.001 mm |
| B - Cone Width |
18.263 mm |
| C - Cup Width |
12.499 mm |
| B |
19.050 mm |
| R - Cone Backface To Clear Radius1 |
2.030 mm |
| r - Cup Backface To Clear Radius2 |
1.52 mm |
| da - Cone Frontface Backing Diameter |
56.90 mm |
| db - Cone Backface Backing Diameter |
59.94 mm |
| Da - Cup Frontface Backing Diameter |
82.00 mm |
| Db - Cup Backface Backing Diameter |
75.95 mm |
| Ab - Cage-Cone Frontface Clearance |
2.3 mm |
| Aa - Cage-Cone Backface Clearance |
1.8 mm |
| a - Effective Center Location3 |
2 mm |
| C90 - Dynamic Radial Rating (90 million revolutions)4 |
3010 lbf |
| C1 - Dynamic Radial Rating (1 million revolutions)5 |
11600 lbf |
| C0 - Static Radial Rating |
14400 lbf |
| Ca90 - Dynamic Thrust Rating (90 million revolutions)6 |
2920 lbf |
| K - Factor7 |
1.03 |
| e - ISO Factor8 |
0.57 |
| Y - ISO Factor9 |
1.06 |
| G1 - Heat Generation Factor (Roller-Raceway) |
26.1 |
| G2 - Heat Generation Factor (Rib-Roller End) |
20.3 |
| Cg - Geometry Factor |
0.0852 |