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Permissible loads for rod ends

Rod ends are primarily intended for the support of radial loads acting in the direction of the shank axis. If loads act at angles to the shank axis (fig. 1), the maximum permissible load is reduced, as additional bending stresses occur in the shank. Under these conditions, consider the design and size dependent material used for the rod end housing (table 1).
The load portion acting perpendicular to the direction of the shank axis should never exceed the value of 0,1 C0. If heavier loads are involved, a larger rod end should be selected.
The maximum permissible load for a rod end in the direction of the shank axis can be calculated using

Pperm = C0 b2 b6

where
Pperm=maximum permissible load [kN]
C0=static load rating [kN]
b2=temperature factor depending on the sliding contact surface combination
  • for rod ends requiring maintenance with steel/steel and steel/bronze sliding contact surface combinations (table 2)
  • for SKF Explorer steel/steel b2 = 1, maximum allowable temperature 110 °C
  • for for maintenance-free rod ends with steel/PTFE sintered bronze sliding contact surface combinations (diagram 1)
  • for for maintenance-free rod ends with steel/PTFE fabric sliding contact surface combinations (diagram 2)
  • for for maintenance-free rod ends with steel PTFE FRP sliding contact surface combinations (diagram 3)
b6=factor for the type of load (table 3)
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