Service Life and Load Safety Factor
Rated Service Life
Rated service life calculation is performed through a special calculation program. Please request our technical questionnaire for calculation. The calculation itself is performed by staff in the application engineering department.
Information Required for myonic Calculation
- Application details (drawings, sketches, technical specifications)
- Workpiece dimensions and weight
- Load cycle details (cutting forces, speeds, operating time)
Static Load Safety Factor
The static load safety factor S0 describes the safety before impermissible plastic deformation in the bearing roller area of the load components.
In the case of purely axial or radial forces, the static load safety can be checked separately using the following formulas:
S0 = C0r / F0r or S0 = C0a / F0a
| Symbol | Description |
|---|---|
| S0 | Static load safety factor (should be >4 for machine tool applications) |
| C0r | Radial static load rating [N] (see dimension tables) |
| C0a | Axial static load rating [N] (see dimension tables) |
| F0r | Maximum radial static bearing load [N] |
| F0a | Maximum axial static bearing load [N] |
Static Limiting Load Diagrams
In most applications, tilting moments are added to radial or axial forces. With the following static limiting load diagrams, the correct bearing size can be easily selected, primarily for bearings with static loads.
Advantages
- Easy selection of bearing sizes primarily with static loads
- Determine the tilting moment Mk that AXDR can absorb in addition to axial load
How to Use the Load Diagram
- X-axis: Equivalent axial bearing load [kN]
- Y-axis: Equivalent tilting moment load [kNm]
- 1 = Bearing/size
- 2 = Permitted range
- 3 = Unpermitted range
Note
AXDR double row angular contact roller bearings and AXRY axial/radial bearings are calculated under the same frame conditions, so both bearing types can be directly compared. They can be directly interchanged when the surrounding structure design complies with myonic catalog data.
AXDR 80 VX to AXDR 210 VX Limiting Load Diagrams
The diagram above shows the static limiting load diagrams for AXDR 80 VX to AXDR 210 VX. The curves show the maximum permissible tilting moment at a given axial load.
AXDR 260 VX to AXDR 650 VX Limiting Load Diagrams
The diagram above shows the static limiting load diagrams for AXDR 260 VX to AXDR 650 VX. Larger bearing sizes have higher load capacities.
Usage Instructions
Selection Steps
- Determine the equivalent axial load Fa in the application
- Determine the tilting moment Mk in the application
- Find the corresponding point on the load diagram
- Select a bearing size whose curve is above that point
- Confirm the selected bearing is within the permitted range
If you have any questions or need more detailed calculations, please contact the myonic application engineering team.