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Radial Load - A load applied normal to the bearing bore axis and
parallel to the shank axis. |
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Axial Load - A load applied
along the bearing bore axis. |
Static
Radial
Limit
Load |
That static load required to produce
a specific permanent set in the bearing structure. It will vary for a
given size as a function of configuration. It may also be PIN limited as a
function of body restraints as in the case of rod ends bearings. |
| Static
Radial Ultimate Load |
That load that can be applied to a
bearing without fracturing the ball, race, or rod end eye. The ultimate
load rating is usually, but not always 1,5 times the limit load. |
Static
Axial
Limit
Load |
That load that can be applied to a
bearing to produce a specified permanent set in the bearing structure. |
Static
Axial
Ultimate
Load |
That load that can be applied to a
bearing without separating the ball from the race. The ultimate load
rating is usually, but not always 1.5 times the limit load. |
|
Calculations
of Load Ratings for Rod Ends and Spherical Bearings |
| D = |
Head Diameter or Diameter of Outer Race |
| d = |
Ball Diameter |
| T = |
Housing Width |
| E = |
Shank Diameter of Female Rod Ends |
| H = |
Diameter of Drilled Hole in Shank of Male Rod End |
| X = |
Proportional Limit of Material
| Brass |
30,000 PSI |
| Stainless Steel (Annealed) |
35,000 PSI |
| Low Carbon Steel |
52,000 PSI |
| Alloy Steel |
140,000 PSI |
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The maximum
static radial load is the lowest product resulting from the following
calculations:
| 1. Radial Load: |
R= d x T x X
Material of Race determines X |
| 2. Head Strength of Rod Ends |
Angle of T/D expressed in radians. |
| 3. Shake Strength of Rod Ends |
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The maximum
static axial load for rod end bearings is determined by the following
formula. This formula does not take in consideration the strength of the
stake in the cartridge type of construction, or does not consider bending
of the shank due to force.
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