Static Safety Factor
The basic static load rating C0 is a static load of a dened direction and size where the calculated contact stress of the roller and the raceway at the contact area under maximum stress is 4000 (MPa). (Contact stress exceeding this value may impede rotation.)This load rating is indicated by C0 in the specication table. It is necessary to consider the following static safety factors based on static and dynamic loads.
| fS | Static safety factor (see Table3) |
|---|---|
| C0 | Basic static load rating (N) |
| P0 | Static equivalent radial load (N) |
Table3 Static Safety Factor (fs)
| Load conditions | Lower limit of fs |
|---|---|
| Normal load | 1 to 2 |
| Impact load | 2 to 3 |
- * The values in the table above are guidelines for minimum static safety factors. However, considering dynamic performance such as service life, we recommend a value of 7 or above.
Static Equivalent Radial Load: P0
The static equivalent radial load of the Model RW is obtained from the following formula.
| P0 | Static equivalent radial load (N) |
|---|---|
| Fr | Radial load (N) |
| Fa | Axial load (N) |
| M | Moment (N･mm) |
| X0 | Static radial factor (X0=1) |
| Y0 | Static axial factor (Y0=0.44) |
| dp | Roller pitch circle diameter (mm) |
