MIL-DTL-5513D
4.7.6.1 Eccentric loading. The following tests are required to simulate tube misalignment of swivel
joints in aircraft by including an eccentric loading.
4.7.6.1.1 Eccentric loading for style a plane swivels. Style a plane swivels shall be loaded radially and
axially during endurance cycling by imposing a force on one element of the assembly. For style a plane
swivels (straight, shaped, elbow, tee, etc.) the load (see table IX) shall be applied parallel to the swiveling
axis as shown on figure 2.
4.7.6.1.2 Eccentric loading for style b misalignment swivel. For style b angular misalignment swivels
the load (see table IX) shall be applied effective at the bearing portion of the swiveling element as shown
on figure 4.
Inches
mm
12
254.0
FIGURE 4. Eccentric loading for swivel joints.
16
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