Describe the 'Winding' method for installing a spiral retaining ring and why it is superior to snap-ring pliers.

Spiral retaining rings do not have 'ears' or 'holes' for pliers; instead, they are installed by 'winding' the turns into the groove. For a shaft, one end of the ring is started into the groove, and the remainder of the ring is spiraled into place by hand or with a simple tool. This method is superior because it minimizes the radial expansion required. Unlike snap rings, which must be opened to their maximum diameter to clear the shaft, a spiral ring is only minimally expanded as it is threaded. This reduces the peak installation stress $\sigma_i$, preventing permanent set and allowing for a tighter 'cling' to the groove bottom. It also eliminates the risk of 'flying' rings associated with plier slippage.