Calculation Example
Calculation procedure
The suspension of a vehicle (dry running) s to be equipped with paired GLYCODUR® plain bushings.
Design data
| Bolt diameter: | d = 20 mm |
| Mean roughness of pin: | Ra = 0.3 µm |
Operating data
| Radial load at the linkage point: | Fr = 13750 N |
| Half angle of oscillation | ß = 0.6° [more info] |
| Oscillating frequency: | f = 250 min-1 |
| Operating temperature: | t = 30 °C |
Based on the design criteria bearing PG 202320 F with a dynamic load capacity C = 30500 N is selected. It is necessary to check whether the bearing can be used at the given operating conditions and to determine the nominal service life.
For the first check consider the pv diagram (page 17):
Specific bearing load
with K according to:
K = 80 MPa for GLYCODUR® F
K = 120 MPa for GLYCODUR® A
These values are within the permissible area Ι in the pv diagram for
GLYCODUR® F bearings. The following factors result:
| Load Factor c1 | = 1 | [more info] |
| Velocity Factor c2 | = 1 | [more info] |
| Temperature Factor c3 | = 1 | [more info] |
| Roughness Factor c4 | = 0.8 | [more info] |
| Load Distribution Factor c5 | = 1* | [more info] |
| KM | = 480 | |
| n | = 1 | (as pv = 0.03 < 1) |
| * Due to the small oscillation angle a point load has been assumed. |
Nominal service life
