© Dr. Steve Rapp

Sample
Problem: Determine how much force the jaws of a gripper must exert to hold a part in a vertical plane under the following conditions:

¬Part weights 20 lb., nonuniform shape

¬Gripper jaws are
parallel to each other, gripping part from its vertical
sides

¬Part is grasped 24 inches from COG

¬Part is 2 in. thick,
max. acceleration of 2.5 Gs, including normal gravitation
force

¬Coefficient of friction is 0.85

¬Safety factor of 2 must
be include.