ABSTRACT
Mechanical actuators are usually designed as electrically driven mechanical screws with the nuts installed stationary in the housing posts. The electrically or hydraulically driven wedge type mechanism is another version of a mechanical actuator. To decrease the coefficient of friction and increase the load carrying capabilities of the wedge type actuators, a Teflon cloth is installed at the interface between the wedge and the ram [25], as shown in Fig. 9.17.
