Analyze a failure where a spiral retaining ring has 'Walked Out' of its groove under impact loading.

'Walking' occurs when cyclic axial impact loads cause the ring to vibrate and momentarily lose contact with the groove wall. If the ring has a slight 'dish' or if the groove has a radius, the axial force creates a radial component that 'pushes' the ring out of the groove. This is compounded if the ring has low 'cling' force. Analysis usually involves checking the 'Groove Squareness' and 'Ring Flatness.' Mitigation includes: 1) Increasing the initial interference fit (cling); 2) Using a deeper groove to increase the 'Shoulder' height; 3) Using a 'Self-Locking' spiral ring where the turns are mechanically linked to prevent radial expansion.