Hinge joints allow flexion and extension only. Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes when performing a biceps curl.

This occurs when the angle of a joint decreases. For example, the elbow flexes when performing a biceps curl. Extension – straightening a joint. This occurs when the angle of a joint increases ...

The input window for the extension leaves you plenty of options for the joint design. In addition to the size of the box (inside or outside measurements can be selected), you need to enter the ...