Official Answer
Answer
Telescoping is a failure mode where the individual turns of a multi-turn spiral ring slide over one another axially, effectively 'unraveling' the ring. This happens when the axial force is so great that it overcomes the radial friction and the stiffness of the material, causing the ring to deform into a helix and slip out of the groove. It is often a sign that the ring's radial wall $b$ is too small for the applied load. Troubleshooting involves increasing the radial wall width or moving to a 'Heavy-Duty' series ring with a higher 'Moment of Inertia' ($I = _x000c_rac{b · t^3}{12}$) to resist the twisting motion that leads to telescoping.
