Which surfaces are best suited for vacuum grippers?

• A. Porous rough surfaces
• B. Highly curved surfaces
• C. Surfaces with rough texture
• D. Smooth, non-porous surfaces

Answer: (D)

Vacuum grippers rely on an airtight seal to generate suction. A smooth, non-porous surface allows full contact without gaps, so the suction stays strong and stable. Porous surfaces leak air through tiny pores, breaking the seal, while rough textures introduce uneven contact and air pockets that reduce gripping force. Highly curved surfaces challenge the seal because the cup cannot conform perfectly, causing leaks or partial adhesion. Therefore, surfaces that are smooth and non-porous—like polished metal, glass, or finished plastics—are best suited for vacuum gripping.