Draw free-body diagrams of all members of the vice-grip pliers in the position shown in Fig. The objective of the analysis will be to relate the forces, F, exerted by the user's hand to the gripping forces, F, exerted on the workpiece. The pliers mechanism can be regarded as being parallel to the horizontal plane, so there are no gravity loads in the plane of action.
Spring
10
Adjusting Screw
FIGURE: The vice-grip pliers