3. The clamping pressure must only hold the workpiece and should never be great enough so as to damage , deform or change any dimensions of the workpiece
4. The clamping and cutting forces should be directed towards the location pins, otherwise the workpiece may be get bent or forced away from the locating pins during machining
5. Clamping should be simple, quick and foolproof. Complicated clamps lose their effectiveness as they wear.
6. The movement of a clamp should be strictly limited and if possible it should be positively guided.
7. Whenever possible, the lifting of the clamp by hand should be avoided if it can be done by means of a spring fitted to it.
8. Clamps should never be relied upon for holding the workpiece against the cutting force. The cutting force should be arranged against a fixed stop or a substantial part of the fixture body