Double-Bellows Vacuum Cups – “2B Cups”Request a Quote Contact Us

Double-bellows vacuum cups provide a longer stroke than single-bellows vacuum cups for greater ability to compensate for varying workpiece heights. This increased ability to compensate for varying heights does come at the cost of stability.
 
Our double-bellows vacuum cups include bottom cleats to help stabilize the cup when collapsed against a workpiece. The added traction surface increases the ability to withstand lateral shear loads. The cleats also help prevent flexible workpieces from deforming into the center of the cup when subjected to deep vacuum.
 
Suitable Workpiece Surface:
  • Flat
  • Slightly Concave
  • Convex
  • Compound
  • Spherical
  • Cylindrical
  • Flexible
  • Shear Loads

View our Double Bellows Vacuum Cups below or to order vacuum cups with cup fittings pre-assembled, click here.  To order cup fittings, click here

 
Double-bellows vacuum cups have a relatively wide sealing lip that lays against the workpiece surface without scrubbing radially outward as the cup collapses under vacuum. This helps prevent the marriage of highly finished surfaces such as injection molded plastic parts or for delicate items such as electronic components.
 
Because they have a longer stroke, double-bellows vacuum cups provide easier handling of products packed in boxes or blister packs. For palletizing applications, the stroke length can compensate for small differences in box heights due to any imperfection in forming the boxes or gluing the flaps. The domed top provides some angular conforming capability which allows for a good grip even when the box top deforms under the load.
 
In operation, double-bellows vacuum cups should remain fully collapsed against the workpiece. If a “springing” action is noticed when the workpiece is lifted or transported, this indicates that the vacuum level is not deep enough to securely hold the workpiece. A larger capacity vacuum pump may be necessary in this situation.
 
Double-bellows vacuum cups are also known as: long-bellows cup, 2.5 bellows cup, 2-1/2 bellows pad.