Bearing load ratings are bearing specific data, derived from the characteristics of the materials used. They are used when selecting Spherical Plain Bearings or Rod Ends for a particular load, but may have to be reduced in adverse operating conditions.

Static Load Ratings C_o [kN]

C₀ indicates the maximum permissible static load which a Rod End at its weakest cross section can withstand without developing permanent distortion.
The C_o values listed in the tables of this brochure have been calculated by using the appropriate material specifications and have been tested on a number of Rod Ends during tensile tests carried out at ambient temperature.
80% of the yield strength resulting from the tests have been used so that a safety factor of 1.25 is included.
The static load C_o is also used for establishing the maximum axial load which is limited by an additional bending stress principally due to the method of fastening of the insert. Following are maximum axial values (deformation) which have been established by pressure testing.

a = ≤ 0,4 for GI/GA + GIO/GAO + GXO
a = ≤ 0,2 for GXS, GXSW, GL mounted in a FLURO rod end bearing
a = ≤ 0,1 for EI/EA, EI/EA...D-NIRO

For spherical plain bearing C_o indicates the radial load, which does not deform the mating surface permanently. Precondition is the stable configuration of the housing.

 

Dynamic Load Ratings C [kN]
This rate is used to establish the working life of Spherical Plain Bearings or Rod Ends when under dynamic load conditions. That is to say when they oscillate, rotate or pivot under load. The values listed in the table result from multiplying the maximum surface pressure p_max admissible in gliding movements be the projected bearing surface A_proj, whereby a specific load rating is established for each type of Rod End. The established standard values for maximum surface load for various combinations of anti friction material have been listed in table 1 which allows for movement when oscillating.

Table 1: Maximum surface pressure