The wavy shims provide just enough gear movement to allow the loadings to balance out. It would be very hard to keep the loading on the gears constant with fixed shims. You'd have to set it up with more slack than needed to stop tight spots which would cause extra wear and generate more heat. Small thinner versions of these can be used as anti-vibration lock washers instead of the thicker offset split washers but those are of course crushed flat.
|