6,35 mm x 15,875 mm x 4,978 mm NMB RF-4DD deep groove ball bearings
Manufacturers of all NMB Bearing 240 kN Axial static load carrying capacity are represented in BEARING-SINGAPORE (PTE)LTD. our partial list of clients. 6,35 mm x 15,875 mm x 4,978 mm Contact Gary for a complete 6,35 mm x 15,875 mm x 4,978 mm NMB RF-4DD deep groove ball bearings list of clients and projects.
What is RF-4DD bearing interchange？
| Brand Name: |
NMB |
| Model Number: |
RF-4DD |
| Series: |
28000 |
| Cone Part Number: |
28156 |
| Cup Part Number: |
28317 |
| Design Units: |
Imperial |
| Bearing Weight: |
0.4 Kg |
| Cage Type: |
Stamped Steel |
| d: |
39.980 mm |
| D: |
80.035 mm |
| PDF |
RF-4DD |
Product Details
| Series |
28000 |
| Cone Part Number |
28156 |
| Cup Part Number |
28317 |
| Design Units |
Imperial |
| Bearing Weight |
0.4 Kg |
| Cage Type |
Stamped Steel |
| d |
39.980 mm |
| D |
80.035 mm |
| B - Cone Width |
19.649 mm |
| C - Cup Width |
15.875 mm |
| B |
20.142 mm |
| R - Cone Backface To Clear Radius1 |
2.290 mm |
| r - Cup Backface To Clear Radius2 |
1.52 mm |
| da - Cone Frontface Backing Diameter |
44.96 mm |
| db - Cone Backface Backing Diameter |
49.02 mm |
| Da - Cup Frontface Backing Diameter |
73.90 mm |
| Db - Cup Backface Backing Diameter |
69.09 mm |
| Ab - Cage-Cone Frontface Clearance |
1.8 mm |
| Aa - Cage-Cone Backface Clearance |
0.3 mm |
| a - Effective Center Location3 |
-3.6 mm |
| C90 - Dynamic Radial Rating (90 million revolutions)4 |
4390 lbf |
| C1 - Dynamic Radial Rating (1 million revolutions)5 |
16900 lbf |
| C0 - Static Radial Rating |
15500 lbf |
| Ca90 - Dynamic Thrust Rating (90 million revolutions)6 |
3020 lbf |
| K - Factor7 |
1.45 |
| e - ISO Factor8 |
0.4 |
| Y - ISO Factor9 |
1.49 |
| G1 - Heat Generation Factor (Roller-Raceway) |
20.7 |
| G2 - Heat Generation Factor (Rib-Roller End) |
12.5 |
| Cg - Geometry Factor |
0.0709 |