When a suction cup is sealed against a surface and air is squeezed out of the cup, a low pressure region is created inside the suction area. It's actually the atmospheric pressure OUTSIDE the cup, pressing down on the low pressure area INSIDE the cup, that creates the suction.

How does a vacuum suction cup work?

Vacuum cups, or suction cups, are often used as grippers in manual or automated handling applications. ... Instead, when a suction cup contacts the workpiece surface, it activates a vacuum generator (such as a vacuum ejector, blower or pump) and draws out air from the cup interior and creates a vacuum.

How does vacuum create suction?

The suction motor creates vacuum pressure and suction by rotating a motor fan. The impeller rotates at an incredibly high speed of about 30,000 to 35,000 RPM. A suction motor's power is measured by multiplying the rate of air flow and the vacuum pressure, which induces air flow from the brush through the hose. Brush.