Originally Posted by
Gary Campbell
Remember a couple rules of thumb...
What size are your small pieces? Remember there will be little or no vacuum 1 1/4 to 1 1/2 " inches from the edge. Subtract a 1 1/2" borders area from the total area of the part. Apply the rest of the area in square inches times your max vacuum /2 (for psi) and multiply it by .6 (60% for cut slots). If that number is less than 50, it probably wont hold, period. Between 50 and 75, it could hold with special attention. 75 to 100, maybe and over 100 most likely