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 [more info]:
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. |