Specifications of SKF Bearing W 638/4-2Z
Dimensions
d | 4.0mm | Bore diameter |
D | 9.0mm | Outside diameter |
B | 4.0mm | Width |
d1 | 5.2mm | Shoulder diameter |
d2 | 5.2mm | Recess diameter |
D2 | 8.1mm | Recess diameter |
r1,2 | 0.1mm | Chamfer dimension |
Abutment dimensions
da | 4.8mm | Diameter of shaft abutment |
da | 5.1mm | Diameter of shaft abutment |
Da | 8.2mm | Diameter of housing abutment |
ra | 0.1mm | Radius of shaft or housing fillet |
Calculation data
Basic dynamic load rating | C | 0.364kN |
Basic static load rating | C0 | 0.114kN |
Fatigue load limit | Pu | 0.005kN |
Reference speed | 140000.0r/min | |
Limiting speed | 70000.0r/min | |
Minimum load factor | kr | 0.02 |
Calculation factor | f0 | 6.5 |
Mass
Mass bearing | 0.000925kg |
Tolerance class
Dimensional tolerances | Normal |
Radial run-out | Normal |