Main flexure characteristics are: precision, repeatability, and no friction. Similar to plain or rolling bearings, flexures are joints, connecting solid members which permit relative motion in some directions while constraining motion in others.
Flexible bearings are mechanical linkages just like conventional bearings. Mechanical linkages assume friction or a rolling motion between two solid bodies. Both conventional bearings and mechanical linkages rely upon the friction or rolling of solid bodies on each other, whereas flexures use the elastic properties of matter. In fact, flexures bring numerous advantages for high precision mechanisms: