Originally Posted by JFettig How much force can be exerted on one of these vacuume clamps?.... |
The maximum force you can get is 1 atmosphere of pressure, 14.7 psi, if you are able to draw a perfect vacuum. The best vacuum you can get with a venturi is about 90% of a perfect vacuum which is about 13.2 psi. It is fairly easy to get around 60% to 80% of a perfect vacuum with venturi which is between 8 and 9 psi. This does not sound like much but if your part has a decent sort of area the total force holding it down can be large; at 60% vacuum one square foot, 144 square inches, is clamped with a force of 1152lbs. All this assumes your system does not have any leaks; venturi vacuum generators cannot overcome leaks.